TY  - JOUR
AU  - Djedović, Radica
AU  - Vukasinovic, Natascha
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Ismael, Hasan
AU  - Janković, Dobrila
AU  - Gligović, Nikolija
AU  - Brka, Muhamed
AU  - Štrbac, Ljuba
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6281
AB  - In this study, the authors focused on the evaluation of the genetic parameters of longevity, milk yield traits, and type traits in dairy cattle populations in the Republic of Serbia. The total dataset used consisted of production records and pedigree data for 32,512 Holstein cows that calved from 1981 to 2015. The animal model was applied to determine the variance and covariance components and genetic parameters of the analyzed traits by applying the restricted maximum likelihood (REML) approach and using the programs VCE6 and PEST. The heritability of longevity traits was estimated using the Survival Kit V6.0 software package. Variance and covariance were estimated for five production traits: milk yield (MY), fat yield (FY), protein yield (PY), milk fat content (MC), and protein content (PC), and three longevity traits: length of productive life (LPL), lifetime milk yield (LMY), and the number of lactations achieved (NL) as well as for 18 standard type traits. Heritabilities for the milk, fat, and protein yield traits were 0.20 (MY), 0.15 (FY), and 0.19 (PY), respectively. The estimated coefficients of heritability for the longevity traits were higher when using the Weibull proportional hazards model compared to the traditional linear methods and ranged from 0.08 for NL to 0.10 for LPL. Heritability values for the type traits varied from a low of 0.10 (RLSsv—rear legs set–side view) to medium values of 0.32 (ST-stature). Genetic correlations were found between MY and the following longevity traits: LPL, LMY, and NL with values of −0.18, −0.11, and −0.09, respectively. Genetic correlations were found between MY and a number of linear type traits and varied from 0.02 (between MY and RUH-rear udder height) to 0.28 (between MY and FUA-fore udder attachment). Genetic correlations between the 18 investigated type traits ranged from −0.33 between TL (top line) and RTP (rear teats position) to 0.71 between AN (angularity) and RUH (rear udder height). Genetic correlations between most linear type traits and longevity traits (LPL, LMY, and NL) were generally negative and very low. The highest positive genetic correlation was found between UD and LPL (rxy = 0.38). © 2023 by the authors.
T2  - Animals
T2  - Animals
T1  - Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein
IS  - 3
VL  - 13
DO  - 10.3390/ani13030534
ER  - 

@article{
author = "Djedović, Radica and Vukasinovic, Natascha and Stanojević, Dragan and Bogdanović, Vladan and Ismael, Hasan and Janković, Dobrila and Gligović, Nikolija and Brka, Muhamed and Štrbac, Ljuba",
year = "2023",
abstract = "In this study, the authors focused on the evaluation of the genetic parameters of longevity, milk yield traits, and type traits in dairy cattle populations in the Republic of Serbia. The total dataset used consisted of production records and pedigree data for 32,512 Holstein cows that calved from 1981 to 2015. The animal model was applied to determine the variance and covariance components and genetic parameters of the analyzed traits by applying the restricted maximum likelihood (REML) approach and using the programs VCE6 and PEST. The heritability of longevity traits was estimated using the Survival Kit V6.0 software package. Variance and covariance were estimated for five production traits: milk yield (MY), fat yield (FY), protein yield (PY), milk fat content (MC), and protein content (PC), and three longevity traits: length of productive life (LPL), lifetime milk yield (LMY), and the number of lactations achieved (NL) as well as for 18 standard type traits. Heritabilities for the milk, fat, and protein yield traits were 0.20 (MY), 0.15 (FY), and 0.19 (PY), respectively. The estimated coefficients of heritability for the longevity traits were higher when using the Weibull proportional hazards model compared to the traditional linear methods and ranged from 0.08 for NL to 0.10 for LPL. Heritability values for the type traits varied from a low of 0.10 (RLSsv—rear legs set–side view) to medium values of 0.32 (ST-stature). Genetic correlations were found between MY and the following longevity traits: LPL, LMY, and NL with values of −0.18, −0.11, and −0.09, respectively. Genetic correlations were found between MY and a number of linear type traits and varied from 0.02 (between MY and RUH-rear udder height) to 0.28 (between MY and FUA-fore udder attachment). Genetic correlations between the 18 investigated type traits ranged from −0.33 between TL (top line) and RTP (rear teats position) to 0.71 between AN (angularity) and RUH (rear udder height). Genetic correlations between most linear type traits and longevity traits (LPL, LMY, and NL) were generally negative and very low. The highest positive genetic correlation was found between UD and LPL (rxy = 0.38). © 2023 by the authors.",
journal = "Animals, Animals",
title = "Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein",
number = "3",
volume = "13",
doi = "10.3390/ani13030534"
}

Djedović, R., Vukasinovic, N., Stanojević, D., Bogdanović, V., Ismael, H., Janković, D., Gligović, N., Brka, M.,& Štrbac, L.. (2023). Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein. in Animals, 13(3).
https://doi.org/10.3390/ani13030534

Djedović R, Vukasinovic N, Stanojević D, Bogdanović V, Ismael H, Janković D, Gligović N, Brka M, Štrbac L. Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein. in Animals. 2023;13(3).
doi:10.3390/ani13030534 .

Djedović, Radica, Vukasinovic, Natascha, Stanojević, Dragan, Bogdanović, Vladan, Ismael, Hasan, Janković, Dobrila, Gligović, Nikolija, Brka, Muhamed, Štrbac, Ljuba, "Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein" in Animals, 13, no. 3 (2023),
https://doi.org/10.3390/ani13030534 . .

TY  - JOUR
AU  - Ismael, H.
AU  - Djedović, R.
AU  - Bogdanović, V.
AU  - Stanojević, D.
AU  - Trivunović, S.
AU  - Janković, D.
AU  - Stamenić, T.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6196
AB  - The present research aimed to investigate the genetic trends for udder traits (fore udder attachment; rear udder height; udder depth; front teat placement; rear teat placement; front teat length and rear teat length) and angularity of Holstein Friesian cows in Serbia. A multi-trait animal model was used to estimate genetic parameters, through REML procedures. In the study 10403 first-lactation cows Holstein type from 12 different regions in Serbia were included. The cows were daughters of 221 Holstein Friesian sires. The age at first calving was from 19 to 44 months, and there were 10 stages of lactation. Udder type traits and angularity were classified by 24 classifiers on a linear scale of 1 to 9. Udder type traits had heritability estimates ranging from 0.03 for rear teat placement to 0.12 for fore udder attachment, and angularity had heritability 0.10. Genetic trend for angularity of Holstein Friesian cows in Serbia shows that ribs are becoming less angular and extremely rounded, while genetic trends for udder traits show that teat lengths are becoming longer and inside of quarter, and udder is shallow. The genetic trend for fore udder attachment indicates there is indirect selection for weaker udders. © 2022, Pakistan Agricultural Scientists Forum. All rights reserved.
T2  - Journal of Animal and Plant Sciences
T2  - Journal of Animal and Plant Sciences
T1  - GENETIC AND PHENOTYPIC TRENDS FOR UDDER TRAITS AND ANGULARITY OF HOLSTEIN FRIESIAN COWS
EP  - 1184
IS  - 5
SP  - 1176
VL  - 32
DO  - 10.36899/JAPS.2022.5.0523
ER  - 

@article{
author = "Ismael, H. and Djedović, R. and Bogdanović, V. and Stanojević, D. and Trivunović, S. and Janković, D. and Stamenić, T.",
year = "2022",
abstract = "The present research aimed to investigate the genetic trends for udder traits (fore udder attachment; rear udder height; udder depth; front teat placement; rear teat placement; front teat length and rear teat length) and angularity of Holstein Friesian cows in Serbia. A multi-trait animal model was used to estimate genetic parameters, through REML procedures. In the study 10403 first-lactation cows Holstein type from 12 different regions in Serbia were included. The cows were daughters of 221 Holstein Friesian sires. The age at first calving was from 19 to 44 months, and there were 10 stages of lactation. Udder type traits and angularity were classified by 24 classifiers on a linear scale of 1 to 9. Udder type traits had heritability estimates ranging from 0.03 for rear teat placement to 0.12 for fore udder attachment, and angularity had heritability 0.10. Genetic trend for angularity of Holstein Friesian cows in Serbia shows that ribs are becoming less angular and extremely rounded, while genetic trends for udder traits show that teat lengths are becoming longer and inside of quarter, and udder is shallow. The genetic trend for fore udder attachment indicates there is indirect selection for weaker udders. © 2022, Pakistan Agricultural Scientists Forum. All rights reserved.",
journal = "Journal of Animal and Plant Sciences, Journal of Animal and Plant Sciences",
title = "GENETIC AND PHENOTYPIC TRENDS FOR UDDER TRAITS AND ANGULARITY OF HOLSTEIN FRIESIAN COWS",
pages = "1184-1176",
number = "5",
volume = "32",
doi = "10.36899/JAPS.2022.5.0523"
}

Ismael, H., Djedović, R., Bogdanović, V., Stanojević, D., Trivunović, S., Janković, D.,& Stamenić, T.. (2022). GENETIC AND PHENOTYPIC TRENDS FOR UDDER TRAITS AND ANGULARITY OF HOLSTEIN FRIESIAN COWS. in Journal of Animal and Plant Sciences, 32(5), 1176-1184.
https://doi.org/10.36899/JAPS.2022.5.0523

Ismael H, Djedović R, Bogdanović V, Stanojević D, Trivunović S, Janković D, Stamenić T. GENETIC AND PHENOTYPIC TRENDS FOR UDDER TRAITS AND ANGULARITY OF HOLSTEIN FRIESIAN COWS. in Journal of Animal and Plant Sciences. 2022;32(5):1176-1184.
doi:10.36899/JAPS.2022.5.0523 .

Ismael, H., Djedović, R., Bogdanović, V., Stanojević, D., Trivunović, S., Janković, D., Stamenić, T., "GENETIC AND PHENOTYPIC TRENDS FOR UDDER TRAITS AND ANGULARITY OF HOLSTEIN FRIESIAN COWS" in Journal of Animal and Plant Sciences, 32, no. 5 (2022):1176-1184,
https://doi.org/10.36899/JAPS.2022.5.0523 . .

TY  - JOUR
AU  - Djedović, Radica
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Ostojić Andrić, Dušica
AU  - Samolovac, Ljiljana
AU  - Stamenić, Tamara
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5923
AB  - In order to examine the biased milk production depending on the sex of calves, data on calving and milk yield characteristics of 15,181 Holstein type cows in PK Belgrade, Serbia were analyzed. A total of 30,362 lactations that were realized in the period from 1985 to 2017 were analyzed. Data were prepared and analyzed using the SAS software package (SAS Institute Inc. Software License 9.3, 2012). The expression and variability of investigated traits were determined using the PROC MEANS procedure, while the effect of individual factors on milk yield traits was analyzed using the PROC GLM procedure. Obtained results deviate from the views of the Trivers–Willard (TW) hypothesis. The results indicate that mothers invest more in female offspring by producing a higher milk and fat yield in the first and second lactation compared to male offspring. This is especially emphasized under better environmental conditions. The highest milk yield (7788 kg) and fat yield (271 kg) in the second lactation were achieved in the combination with two consecutive female calves in the group of higher-than-average milk production farms, and lowest in the combination of two consecutive male calves (6783 kg for the MY and 243 kg for the FY), respectively.
PB  - MDPI AG
T2  - Animals
T1  - Bias of calf sex on milk yield and fat yield in holstein crossbreed cows
IS  - 9
SP  - 2536
VL  - 11
DO  - 10.3390/ani11092536
ER  - 

@article{
author = "Djedović, Radica and Stanojević, Dragan and Bogdanović, Vladan and Ostojić Andrić, Dušica and Samolovac, Ljiljana and Stamenić, Tamara",
year = "2021",
abstract = "In order to examine the biased milk production depending on the sex of calves, data on calving and milk yield characteristics of 15,181 Holstein type cows in PK Belgrade, Serbia were analyzed. A total of 30,362 lactations that were realized in the period from 1985 to 2017 were analyzed. Data were prepared and analyzed using the SAS software package (SAS Institute Inc. Software License 9.3, 2012). The expression and variability of investigated traits were determined using the PROC MEANS procedure, while the effect of individual factors on milk yield traits was analyzed using the PROC GLM procedure. Obtained results deviate from the views of the Trivers–Willard (TW) hypothesis. The results indicate that mothers invest more in female offspring by producing a higher milk and fat yield in the first and second lactation compared to male offspring. This is especially emphasized under better environmental conditions. The highest milk yield (7788 kg) and fat yield (271 kg) in the second lactation were achieved in the combination with two consecutive female calves in the group of higher-than-average milk production farms, and lowest in the combination of two consecutive male calves (6783 kg for the MY and 243 kg for the FY), respectively.",
publisher = "MDPI AG",
journal = "Animals",
title = "Bias of calf sex on milk yield and fat yield in holstein crossbreed cows",
number = "9",
pages = "2536",
volume = "11",
doi = "10.3390/ani11092536"
}

Djedović, R., Stanojević, D., Bogdanović, V., Ostojić Andrić, D., Samolovac, L.,& Stamenić, T.. (2021). Bias of calf sex on milk yield and fat yield in holstein crossbreed cows. in Animals
MDPI AG., 11(9), 2536.
https://doi.org/10.3390/ani11092536

Djedović R, Stanojević D, Bogdanović V, Ostojić Andrić D, Samolovac L, Stamenić T. Bias of calf sex on milk yield and fat yield in holstein crossbreed cows. in Animals. 2021;11(9):2536.
doi:10.3390/ani11092536 .

Djedović, Radica, Stanojević, Dragan, Bogdanović, Vladan, Ostojić Andrić, Dušica, Samolovac, Ljiljana, Stamenić, Tamara, "Bias of calf sex on milk yield and fat yield in holstein crossbreed cows" in Animals, 11, no. 9 (2021):2536,
https://doi.org/10.3390/ani11092536 . .

TY  - JOUR
AU  - Kučević, Denis
AU  - Trivunović, Snežana
AU  - Šoronja, Žika
AU  - Janković, Dobrila
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Papović, Tamara
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5483
AB  - The objective of this research was to determine the association between age at first calving (AFC) and milk production in the first lactation of longevity traits for Holstein cows. The research was conducted on 2307 cows raised on 4 farms in AP Vojvodina. The cows were culled in the period from 2017 to 2018. The cows belonged to the group of Holstein Friesian breed of cattle. Cow longevity was observed using three parameters: number of lactations (NL), lifetime milk yield (LMY) and length of productive life (LPL). The research involved the influence of the farm on which the animals realized their production, the season of first calving. A mean value obtained for the length of productive life in the analysed population was 1207 days (3.30 years on average). During this period the animals on average realized 2.45 lactations and produced on average 18798 kg milk. All studied traits showed a high level of variability. From these data, the study sought to determine the influence of factors on the traits of longevity, our research present that studied factors showed high statistical significance on these traits except in the case of the season of first calving where a statistical significance effect wasn't observed. The season of first calving did not affect the animal traits for longevity and, generally, didn't affect the calving interval. Regarding the obtained correlation data between age at first calving and length of productive life, it can be concluded that belated AFC leads to reduced reproductive performance.
AB  - Sprovedeno istraživanje imalo je za cilj da utvrdi povezanost između uzrasta pri prvom teljenju i proizvodnje mleka u prvoj laktaciji sa osobinama dugovečnosti za krave holštajn-frizijske rase. Istraživanjem je obuhvaćeno 2307 krava, sa 4 različite farme sa teritorije AP Vojvodine. Krave su izlučene u periodu od 2017 do 2018 godine. Dugovečnost krava je posmatrana kroz tri pokazatelja: broj ostvarenih laktacija (NL), životna količina proizvedenog mleka (LMY) i dužina produktivnog života (LPL). Prosečno trajanje produktivnog života za sva grla uključena u analizu iznosilo je 1207 dana (3.30 godine u proseku). Grla obuhvaćena analizom u toku svog produktivnog života su prosečno proizvela 18798 kg mleka. Broj laktacija koje je svako grlo prosečno ostvarilo u toku trajanja svog produktivnog života iznosio je 2.45, pri čemu su svi ispitani parametri pokazali visok nivo varijabilnosti. U istraživanju su ispitani fiksni uticaji farme na kojoj je grlo proizvodilo, uzrasta pri prvom teljenju, sistema proizvodnje i sezone pri prvom teljenju na osobine dugovečnosti i međutelidbeni interval, korišćenjem linearnog modela. Na osnovu rezultata dobijenih istraživanjem, fiksni faktori su pokazali visoku statističku značajnost za ispitivane osobine, osim u slučaju sezone pri prvom teljenju, gde nije ispoljena statistička značajnost za osobine obuhvaćene istraživanjem. Na osnovu rezultata, utvrđena je povezanost između uzrasta pri prvom teljenju i dužine produktivnog života, pri čemu se može zaključiti da su kraći produktivni život imale životinje koje su se kasnije telile.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows
T1  - Povezanost između uzrasta pri prvom teljenju i proizvodnje u prvoj laktaciji sa osobinama dugovečnosti kod mlečnih krava
EP  - 35
IS  - 1
SP  - 27
VL  - 36
DO  - 10.2298/BAH2001027K
ER  - 

@article{
author = "Kučević, Denis and Trivunović, Snežana and Šoronja, Žika and Janković, Dobrila and Stanojević, Dragan and Djedović, Radica and Papović, Tamara",
year = "2020",
abstract = "The objective of this research was to determine the association between age at first calving (AFC) and milk production in the first lactation of longevity traits for Holstein cows. The research was conducted on 2307 cows raised on 4 farms in AP Vojvodina. The cows were culled in the period from 2017 to 2018. The cows belonged to the group of Holstein Friesian breed of cattle. Cow longevity was observed using three parameters: number of lactations (NL), lifetime milk yield (LMY) and length of productive life (LPL). The research involved the influence of the farm on which the animals realized their production, the season of first calving. A mean value obtained for the length of productive life in the analysed population was 1207 days (3.30 years on average). During this period the animals on average realized 2.45 lactations and produced on average 18798 kg milk. All studied traits showed a high level of variability. From these data, the study sought to determine the influence of factors on the traits of longevity, our research present that studied factors showed high statistical significance on these traits except in the case of the season of first calving where a statistical significance effect wasn't observed. The season of first calving did not affect the animal traits for longevity and, generally, didn't affect the calving interval. Regarding the obtained correlation data between age at first calving and length of productive life, it can be concluded that belated AFC leads to reduced reproductive performance., Sprovedeno istraživanje imalo je za cilj da utvrdi povezanost između uzrasta pri prvom teljenju i proizvodnje mleka u prvoj laktaciji sa osobinama dugovečnosti za krave holštajn-frizijske rase. Istraživanjem je obuhvaćeno 2307 krava, sa 4 različite farme sa teritorije AP Vojvodine. Krave su izlučene u periodu od 2017 do 2018 godine. Dugovečnost krava je posmatrana kroz tri pokazatelja: broj ostvarenih laktacija (NL), životna količina proizvedenog mleka (LMY) i dužina produktivnog života (LPL). Prosečno trajanje produktivnog života za sva grla uključena u analizu iznosilo je 1207 dana (3.30 godine u proseku). Grla obuhvaćena analizom u toku svog produktivnog života su prosečno proizvela 18798 kg mleka. Broj laktacija koje je svako grlo prosečno ostvarilo u toku trajanja svog produktivnog života iznosio je 2.45, pri čemu su svi ispitani parametri pokazali visok nivo varijabilnosti. U istraživanju su ispitani fiksni uticaji farme na kojoj je grlo proizvodilo, uzrasta pri prvom teljenju, sistema proizvodnje i sezone pri prvom teljenju na osobine dugovečnosti i međutelidbeni interval, korišćenjem linearnog modela. Na osnovu rezultata dobijenih istraživanjem, fiksni faktori su pokazali visoku statističku značajnost za ispitivane osobine, osim u slučaju sezone pri prvom teljenju, gde nije ispoljena statistička značajnost za osobine obuhvaćene istraživanjem. Na osnovu rezultata, utvrđena je povezanost između uzrasta pri prvom teljenju i dužine produktivnog života, pri čemu se može zaključiti da su kraći produktivni život imale životinje koje su se kasnije telile.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows, Povezanost između uzrasta pri prvom teljenju i proizvodnje u prvoj laktaciji sa osobinama dugovečnosti kod mlečnih krava",
pages = "35-27",
number = "1",
volume = "36",
doi = "10.2298/BAH2001027K"
}

Kučević, D., Trivunović, S., Šoronja, Ž., Janković, D., Stanojević, D., Djedović, R.,& Papović, T.. (2020). Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 36(1), 27-35.
https://doi.org/10.2298/BAH2001027K

Kučević D, Trivunović S, Šoronja Ž, Janković D, Stanojević D, Djedović R, Papović T. Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows. in Biotechnology in Animal Husbandry. 2020;36(1):27-35.
doi:10.2298/BAH2001027K .

Kučević, Denis, Trivunović, Snežana, Šoronja, Žika, Janković, Dobrila, Stanojević, Dragan, Djedović, Radica, Papović, Tamara, "Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows" in Biotechnology in Animal Husbandry, 36, no. 1 (2020):27-35,
https://doi.org/10.2298/BAH2001027K . .

TY  - JOUR
AU  - Petrović, Milun D.
AU  - Rakonjac, Simeon
AU  - Bogdanović, Vladan
AU  - Bogosavljević-Bošković, Snežana
AU  - Djoković, Radojica
AU  - Djedović, Radica
AU  - Petrović, Miloš
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5177
AB  - The effects of fixed non-genetic factors (farm, season of birth, year of birth, total number of lactations) and a continuous non-genetic factor (age at first conception) on the expression and variability of longevity traits such as age at culling, length of productive life, days in milk and cow efficiency index were investigated in 2548 Simmental cows in three farming areas. Based on the model used for the analysis of the effects of non-genetic factors, including the environment and cow age at first conception, on the expression and variability of longevity traits, the overall means for age at culling, length of productive life, days in milk and cow efficiency index were 2445.21±17.49 days, 1562.55±17.71 days, 1094.17±12.28 days and 58.68±0.32%, respectively. The effect of farming area, year of birth and lactation group on longevity traits was very significant (P lt 0.01), whereas the effect of season of birth was significant (P lt 0.05). Age at first conception had a highly significant (P lt 0.01) effect on age at culling, length of productive life and cow efficiency index, and no significant effect on days in milk (P>0.05). Based on the model used, the coefficients of determination (R2 ) were very significant (P lt 0.01) for all longevity traits, and ranged from 0.898 for age at culling to 0.959 for days in milk.
AB  - Uticaj fiksnih (farma, sezona i godina rođenja, ukupan broj laktacija) i kontinuelnih (uzrast pri prvoj oplodnji) sistematskih faktora na ispoljenost i varijabilnost osobina dugovečnosti kao što su uzrast pri izlučenju, dužina produktivnog života, ukupan broj muznih dana i indeks iskorišćavanja krava proučavan je na uzorku od 2548 simentalskih krava raspoređenih na tri odgajivačka područja. Na osnovu primenjenog modela za analizu uticaja sistematskih faktora okoline i uzrasta krava pri prvoj oplodnji na ispoljenost i varijabilnost osobina dugovečnosti opšti prosek za uzrast pri izlučenju, dužinu produktivnog života, ukupan broj muznih dana i indeks iskorišćavanja krava iznosio je 2445,21±17,49 dana, 1562,55±17,71 dana, 1094,17±12,28 dana i 58,68±0,32%. Uticaj odgajivačkog područja, godine rođenja i grupe laktacija na osobine dugovečnosti bio je vrlo značajan (P lt 0.01), dok je uticaj sezone rođenja krava bio značajan (P lt 0.05). Uzrast pri prvoj oplodnji visoko značajno (P lt 0.01) je uticao na uzrast pri izlučenju, dužinu produktivnog života i indeks iskorišćavanja krava, dok na ukupan broj muznih dana nije imao značajan uticaj (P>0.05). Dobijeni koeficijenti determinacije (R2 ), na osnovu primenjenog modela, za sve osobine dugovečnosti bili su vrlo značajni (P lt 0.01) i kretali su se od 0,898 kod uzrasta pri izlučenju do 0,959 kod ukupnog broja muznih dana.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Effect of non-genetic factors on longevity traits in Simmental cows
T1  - Uticaj sistematskih faktora na osobine dugovečnosti kod krava simentalske rase
EP  - 241
IS  - 3
SP  - 229
VL  - 35
DO  - 10.2298/BAH1903229P
ER  - 

@article{
author = "Petrović, Milun D. and Rakonjac, Simeon and Bogdanović, Vladan and Bogosavljević-Bošković, Snežana and Djoković, Radojica and Djedović, Radica and Petrović, Miloš",
year = "2019",
abstract = "The effects of fixed non-genetic factors (farm, season of birth, year of birth, total number of lactations) and a continuous non-genetic factor (age at first conception) on the expression and variability of longevity traits such as age at culling, length of productive life, days in milk and cow efficiency index were investigated in 2548 Simmental cows in three farming areas. Based on the model used for the analysis of the effects of non-genetic factors, including the environment and cow age at first conception, on the expression and variability of longevity traits, the overall means for age at culling, length of productive life, days in milk and cow efficiency index were 2445.21±17.49 days, 1562.55±17.71 days, 1094.17±12.28 days and 58.68±0.32%, respectively. The effect of farming area, year of birth and lactation group on longevity traits was very significant (P lt 0.01), whereas the effect of season of birth was significant (P lt 0.05). Age at first conception had a highly significant (P lt 0.01) effect on age at culling, length of productive life and cow efficiency index, and no significant effect on days in milk (P>0.05). Based on the model used, the coefficients of determination (R2 ) were very significant (P lt 0.01) for all longevity traits, and ranged from 0.898 for age at culling to 0.959 for days in milk., Uticaj fiksnih (farma, sezona i godina rođenja, ukupan broj laktacija) i kontinuelnih (uzrast pri prvoj oplodnji) sistematskih faktora na ispoljenost i varijabilnost osobina dugovečnosti kao što su uzrast pri izlučenju, dužina produktivnog života, ukupan broj muznih dana i indeks iskorišćavanja krava proučavan je na uzorku od 2548 simentalskih krava raspoređenih na tri odgajivačka područja. Na osnovu primenjenog modela za analizu uticaja sistematskih faktora okoline i uzrasta krava pri prvoj oplodnji na ispoljenost i varijabilnost osobina dugovečnosti opšti prosek za uzrast pri izlučenju, dužinu produktivnog života, ukupan broj muznih dana i indeks iskorišćavanja krava iznosio je 2445,21±17,49 dana, 1562,55±17,71 dana, 1094,17±12,28 dana i 58,68±0,32%. Uticaj odgajivačkog područja, godine rođenja i grupe laktacija na osobine dugovečnosti bio je vrlo značajan (P lt 0.01), dok je uticaj sezone rođenja krava bio značajan (P lt 0.05). Uzrast pri prvoj oplodnji visoko značajno (P lt 0.01) je uticao na uzrast pri izlučenju, dužinu produktivnog života i indeks iskorišćavanja krava, dok na ukupan broj muznih dana nije imao značajan uticaj (P>0.05). Dobijeni koeficijenti determinacije (R2 ), na osnovu primenjenog modela, za sve osobine dugovečnosti bili su vrlo značajni (P lt 0.01) i kretali su se od 0,898 kod uzrasta pri izlučenju do 0,959 kod ukupnog broja muznih dana.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Effect of non-genetic factors on longevity traits in Simmental cows, Uticaj sistematskih faktora na osobine dugovečnosti kod krava simentalske rase",
pages = "241-229",
number = "3",
volume = "35",
doi = "10.2298/BAH1903229P"
}

Petrović, M. D., Rakonjac, S., Bogdanović, V., Bogosavljević-Bošković, S., Djoković, R., Djedović, R.,& Petrović, M.. (2019). Effect of non-genetic factors on longevity traits in Simmental cows. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 35(3), 229-241.
https://doi.org/10.2298/BAH1903229P

Petrović MD, Rakonjac S, Bogdanović V, Bogosavljević-Bošković S, Djoković R, Djedović R, Petrović M. Effect of non-genetic factors on longevity traits in Simmental cows. in Biotechnology in Animal Husbandry. 2019;35(3):229-241.
doi:10.2298/BAH1903229P .

Petrović, Milun D., Rakonjac, Simeon, Bogdanović, Vladan, Bogosavljević-Bošković, Snežana, Djoković, Radojica, Djedović, Radica, Petrović, Miloš, "Effect of non-genetic factors on longevity traits in Simmental cows" in Biotechnology in Animal Husbandry, 35, no. 3 (2019):229-241,
https://doi.org/10.2298/BAH1903229P . .

TY  - JOUR
AU  - Molerović, Nikola
AU  - Rašković, Božidar
AU  - Djedović, Radica
AU  - Ostojić-Andrić, Dušica
AU  - Marković, Zoran
AU  - Marić, Saša
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5196
AB  - Due to the ecological concerns and preservation of genetic resources, the characterization of genetic structure of the brown trout (Salmo trutta) was carried out on the "Braduljica" fish farm. DNA was isolated from fin clips of 10 individuals, and after that molecular PCR-RFLP methods were used for distinguishing between Atlantic and Danubian lineages based on control region of the mitochondrial DNA (CR mtDNA) and lactate dehydrogenase gene of the nuclear DNA (LDH nDNA). Based on phenotypic characteristics it was estimated that out of 10 individuals included in this study five belonged to the allochtonous Atlantic lineage and remaining five belonged to the native Danubian lineage of brown trout. However, results of molecular analyses showed a high percentage of allochthonous genes among the individuals, which confirms the hybridization between these two lineages. Also, the results showed that the selection based on the phenotype is not adequate. In order to continue with proper broodstock management, it is necessary to eliminate allochtonous individuals of the Atlantic lineage from the broodstock.
AB  - U cilju zaštite ţivotne sredine i genetiĉkih resursa potoĉne pastrmke (Salmo trutta) u radu je ispitivana genetiĉka struktura ove vrste na ribnjaku ―Braduljica‖ u blizini Ivanjice. DNK je izolovana iz odseĉaka peraja 10 jedinki, a nakon toga molekularne PCR-RFLP metode su korišćene za razlikovanje izmeĊu atlantske i dunavske linije na bazi kontrolnog regiona mitohondrijalne DNK (KR mtDNK) i jedarnog gena za laktat dehidrogenazu (LDH nDNK). Na osnovu fenotipskih karakteristika procenjeno je da je pet jedinki pripadalo alohtonoj atlantskoj liniji, a preostalih pet autohtonoj dunavskoj liniji potoĉne pastrmke. MeĊutim, rezultati molekularnih analiza pokazali su prisustvo visokog procenta alohtonih gena u analiziranom uzorku, što potvrĊuje hibridizaciju izmeĊu ove dve linije. TakoĊe, rezultati ukazuju na to da selekcija na osnovu fenotipa nije adekvatna. Kako bi ribnjak nastavio da se bavi gajenjem potoĉne pastrmke za potrebe poribljavanja okolnih reka, neophodno je da se eliminišu jedinke atlantske linije iz matiĉnog fonda.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Characterization of the genetic structure of the brown trout (Salmo trutta) from "Braduljica" fish farm, Serbia
T1  - Određivanje genetičke strukture potočne pastrmke (Salmo trutta) iz ribnjaka "Braduljica", Srbija
EP  - 299
IS  - 3
SP  - 289
VL  - 35
DO  - 10.2298/BAH1903289M
ER  - 

@article{
author = "Molerović, Nikola and Rašković, Božidar and Djedović, Radica and Ostojić-Andrić, Dušica and Marković, Zoran and Marić, Saša",
year = "2019",
abstract = "Due to the ecological concerns and preservation of genetic resources, the characterization of genetic structure of the brown trout (Salmo trutta) was carried out on the "Braduljica" fish farm. DNA was isolated from fin clips of 10 individuals, and after that molecular PCR-RFLP methods were used for distinguishing between Atlantic and Danubian lineages based on control region of the mitochondrial DNA (CR mtDNA) and lactate dehydrogenase gene of the nuclear DNA (LDH nDNA). Based on phenotypic characteristics it was estimated that out of 10 individuals included in this study five belonged to the allochtonous Atlantic lineage and remaining five belonged to the native Danubian lineage of brown trout. However, results of molecular analyses showed a high percentage of allochthonous genes among the individuals, which confirms the hybridization between these two lineages. Also, the results showed that the selection based on the phenotype is not adequate. In order to continue with proper broodstock management, it is necessary to eliminate allochtonous individuals of the Atlantic lineage from the broodstock., U cilju zaštite ţivotne sredine i genetiĉkih resursa potoĉne pastrmke (Salmo trutta) u radu je ispitivana genetiĉka struktura ove vrste na ribnjaku ―Braduljica‖ u blizini Ivanjice. DNK je izolovana iz odseĉaka peraja 10 jedinki, a nakon toga molekularne PCR-RFLP metode su korišćene za razlikovanje izmeĊu atlantske i dunavske linije na bazi kontrolnog regiona mitohondrijalne DNK (KR mtDNK) i jedarnog gena za laktat dehidrogenazu (LDH nDNK). Na osnovu fenotipskih karakteristika procenjeno je da je pet jedinki pripadalo alohtonoj atlantskoj liniji, a preostalih pet autohtonoj dunavskoj liniji potoĉne pastrmke. MeĊutim, rezultati molekularnih analiza pokazali su prisustvo visokog procenta alohtonih gena u analiziranom uzorku, što potvrĊuje hibridizaciju izmeĊu ove dve linije. TakoĊe, rezultati ukazuju na to da selekcija na osnovu fenotipa nije adekvatna. Kako bi ribnjak nastavio da se bavi gajenjem potoĉne pastrmke za potrebe poribljavanja okolnih reka, neophodno je da se eliminišu jedinke atlantske linije iz matiĉnog fonda.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Characterization of the genetic structure of the brown trout (Salmo trutta) from "Braduljica" fish farm, Serbia, Određivanje genetičke strukture potočne pastrmke (Salmo trutta) iz ribnjaka "Braduljica", Srbija",
pages = "299-289",
number = "3",
volume = "35",
doi = "10.2298/BAH1903289M"
}

Molerović, N., Rašković, B., Djedović, R., Ostojić-Andrić, D., Marković, Z.,& Marić, S.. (2019). Characterization of the genetic structure of the brown trout (Salmo trutta) from "Braduljica" fish farm, Serbia. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 35(3), 289-299.
https://doi.org/10.2298/BAH1903289M

Molerović N, Rašković B, Djedović R, Ostojić-Andrić D, Marković Z, Marić S. Characterization of the genetic structure of the brown trout (Salmo trutta) from "Braduljica" fish farm, Serbia. in Biotechnology in Animal Husbandry. 2019;35(3):289-299.
doi:10.2298/BAH1903289M .

Molerović, Nikola, Rašković, Božidar, Djedović, Radica, Ostojić-Andrić, Dušica, Marković, Zoran, Marić, Saša, "Characterization of the genetic structure of the brown trout (Salmo trutta) from "Braduljica" fish farm, Serbia" in Biotechnology in Animal Husbandry, 35, no. 3 (2019):289-299,
https://doi.org/10.2298/BAH1903289M . .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Raguz, Nikola
AU  - Kučević, Denis
AU  - Popovac, Mladen
AU  - Stojić, Petar
AU  - Samolovac, Ljiljana
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4691
AB  - This research was conducted with the aim of estimating genetic trend for a functional length of productive life (FLPL) in the population of Black and White cattle in Serbia. Research and bulls genetic evaluation for functional longevity were performed on a set of data provided by Agricultural Corporation Belgrade AD (PKB) which contained data on longevity and origin of 22109 cows out of which 26% records were right-censored. Functional length of productive life (FPLP) represents a time period from the first calving to culling or censoring corrected for milk production. Breeding values were estimated using Weibull method of proportional risks within survival analysis a genetic trend for FLPL was calculated using of a regression analysis. The cows included in the analysis were on average first calved in the age of 809 days and had an average share of 81.9% genes of Holstein Friesian breed. An average length of productive life was 1267 days (41.6 months). Distribution of bull standardised breeding values did not statistically significantly differ from normal distribution. An average standardised breeding value was 99. A slightly positive genetic trend was determined, that is, the length of functional productive life was by selection increased by 0.021 day at an annual level while a reliability of estimated breeding values showed a negative trend.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - Genetic trend of functional productive life in the population of black and white cattle in Serbia
EP  - 862
IS  - 3
SP  - 855
VL  - 50
DO  - 10.2298/GENSR1803855S
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Raguz, Nikola and Kučević, Denis and Popovac, Mladen and Stojić, Petar and Samolovac, Ljiljana",
year = "2018",
abstract = "This research was conducted with the aim of estimating genetic trend for a functional length of productive life (FLPL) in the population of Black and White cattle in Serbia. Research and bulls genetic evaluation for functional longevity were performed on a set of data provided by Agricultural Corporation Belgrade AD (PKB) which contained data on longevity and origin of 22109 cows out of which 26% records were right-censored. Functional length of productive life (FPLP) represents a time period from the first calving to culling or censoring corrected for milk production. Breeding values were estimated using Weibull method of proportional risks within survival analysis a genetic trend for FLPL was calculated using of a regression analysis. The cows included in the analysis were on average first calved in the age of 809 days and had an average share of 81.9% genes of Holstein Friesian breed. An average length of productive life was 1267 days (41.6 months). Distribution of bull standardised breeding values did not statistically significantly differ from normal distribution. An average standardised breeding value was 99. A slightly positive genetic trend was determined, that is, the length of functional productive life was by selection increased by 0.021 day at an annual level while a reliability of estimated breeding values showed a negative trend.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "Genetic trend of functional productive life in the population of black and white cattle in Serbia",
pages = "862-855",
number = "3",
volume = "50",
doi = "10.2298/GENSR1803855S"
}

Stanojević, D., Djedović, R., Bogdanović, V., Raguz, N., Kučević, D., Popovac, M., Stojić, P.,& Samolovac, L.. (2018). Genetic trend of functional productive life in the population of black and white cattle in Serbia. in Genetika
Društvo genetičara Srbije, Beograd., 50(3), 855-862.
https://doi.org/10.2298/GENSR1803855S

Stanojević D, Djedović R, Bogdanović V, Raguz N, Kučević D, Popovac M, Stojić P, Samolovac L. Genetic trend of functional productive life in the population of black and white cattle in Serbia. in Genetika. 2018;50(3):855-862.
doi:10.2298/GENSR1803855S .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Raguz, Nikola, Kučević, Denis, Popovac, Mladen, Stojić, Petar, Samolovac, Ljiljana, "Genetic trend of functional productive life in the population of black and white cattle in Serbia" in Genetika, 50, no. 3 (2018):855-862,
https://doi.org/10.2298/GENSR1803855S . .

TY  - JOUR
AU  - Ostojić-Andrić, Dušica
AU  - Hristov, Slavča
AU  - Djedović, Radica
AU  - Pantelić, Vlada
AU  - Nikšić, Dragan
AU  - Dimitrijević, Blagoje
AU  - Tolimir, Nataša
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4871
AB  - The farm animal welfare science has undergone a thorny path of development, often disputed because of its lack of measurability and the purpose of existence. At the very beginning, primarily based on moral and ethical attitudes, over time it pointed to the importance of meeting the needs of animals and the consequences of their neglect and exhaustion in the conditions of intensive livestock production. An important segment of its development was the definition and development of methodologies for the assessment of welfare indicators, which made it measurable and accepted as a scientific discipline with the knowledge applicable and useful in modern production systems. This paper is a concise review of the evolution of the animal welfare science, but also an indication of its future in the context of the development of "symbiotic" connections with the concepts of sustainable agriculture and food safety as integral parts of the modern ecological movement arose from a unified concern for the welfare of people and animals, a care for planetary welfare in general.
AB  - Nauka o dobrobiti farmskih životinja prošla je trnovit put razvoja, često osporavana zbog svoje nemerljivosti i svrsishodnosti postojanja. U samom začetku prvenstveno zasnovana na moralnim i etičkim stavovima, tokom vremena ukazala je na značaj zadovoljenja potreba životinja i posledice njihovog zanemarivanja i iscrpljivanja u uslovima intenzivne stočarske proizvodnje. Važan segment njenog razvoja bili su definisanje i razvoj metodologija za ocenu indikatora dobrobiti, čime je ona postala merljiva i prihvaćena kao naučna disciplina sa saznanjima primenljivim i korisnim u savremenim sistemima proizvodnje. Ovaj rad predstavlja sažet prikaz evolucije nauke o dobrobiti, ali i nagoveštaj njene budućnosti u smislu razvoja "simbiotičkih" veza sa konceptima održive poljoprivrede i bezbednosti hrane kao integralnih delova savremenog ekološkog pokreta proisteklog iz objedinjene brige o dobrobiti ljudi i životinja, brige o dobrobiti planete generalno.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Farm animal welfare concept: From beginnings to integration in modern production systems
T1  - Koncept dobrobiti farmskih životinja - od začetaka do integracije u savremene sisteme proizvodnje
EP  - 277
IS  - 3
SP  - 269
VL  - 34
DO  - 10.2298/BAH1803269O
ER  - 

@article{
author = "Ostojić-Andrić, Dušica and Hristov, Slavča and Djedović, Radica and Pantelić, Vlada and Nikšić, Dragan and Dimitrijević, Blagoje and Tolimir, Nataša",
year = "2018",
abstract = "The farm animal welfare science has undergone a thorny path of development, often disputed because of its lack of measurability and the purpose of existence. At the very beginning, primarily based on moral and ethical attitudes, over time it pointed to the importance of meeting the needs of animals and the consequences of their neglect and exhaustion in the conditions of intensive livestock production. An important segment of its development was the definition and development of methodologies for the assessment of welfare indicators, which made it measurable and accepted as a scientific discipline with the knowledge applicable and useful in modern production systems. This paper is a concise review of the evolution of the animal welfare science, but also an indication of its future in the context of the development of "symbiotic" connections with the concepts of sustainable agriculture and food safety as integral parts of the modern ecological movement arose from a unified concern for the welfare of people and animals, a care for planetary welfare in general., Nauka o dobrobiti farmskih životinja prošla je trnovit put razvoja, često osporavana zbog svoje nemerljivosti i svrsishodnosti postojanja. U samom začetku prvenstveno zasnovana na moralnim i etičkim stavovima, tokom vremena ukazala je na značaj zadovoljenja potreba životinja i posledice njihovog zanemarivanja i iscrpljivanja u uslovima intenzivne stočarske proizvodnje. Važan segment njenog razvoja bili su definisanje i razvoj metodologija za ocenu indikatora dobrobiti, čime je ona postala merljiva i prihvaćena kao naučna disciplina sa saznanjima primenljivim i korisnim u savremenim sistemima proizvodnje. Ovaj rad predstavlja sažet prikaz evolucije nauke o dobrobiti, ali i nagoveštaj njene budućnosti u smislu razvoja "simbiotičkih" veza sa konceptima održive poljoprivrede i bezbednosti hrane kao integralnih delova savremenog ekološkog pokreta proisteklog iz objedinjene brige o dobrobiti ljudi i životinja, brige o dobrobiti planete generalno.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Farm animal welfare concept: From beginnings to integration in modern production systems, Koncept dobrobiti farmskih životinja - od začetaka do integracije u savremene sisteme proizvodnje",
pages = "277-269",
number = "3",
volume = "34",
doi = "10.2298/BAH1803269O"
}

Ostojić-Andrić, D., Hristov, S., Djedović, R., Pantelić, V., Nikšić, D., Dimitrijević, B.,& Tolimir, N.. (2018). Farm animal welfare concept: From beginnings to integration in modern production systems. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 34(3), 269-277.
https://doi.org/10.2298/BAH1803269O

Ostojić-Andrić D, Hristov S, Djedović R, Pantelić V, Nikšić D, Dimitrijević B, Tolimir N. Farm animal welfare concept: From beginnings to integration in modern production systems. in Biotechnology in Animal Husbandry. 2018;34(3):269-277.
doi:10.2298/BAH1803269O .

Ostojić-Andrić, Dušica, Hristov, Slavča, Djedović, Radica, Pantelić, Vlada, Nikšić, Dragan, Dimitrijević, Blagoje, Tolimir, Nataša, "Farm animal welfare concept: From beginnings to integration in modern production systems" in Biotechnology in Animal Husbandry, 34, no. 3 (2018):269-277,
https://doi.org/10.2298/BAH1803269O . .

TY  - JOUR
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Stanojević, Dragan
AU  - Nemes, Zsolt
AU  - Gaspardy, Andras
AU  - Cseh, Sandor
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4039
AB  - The objective of this study was to compare the reproductive traits of heifers and the development characteristics of their calves following artificial insemination (AI) with sexed and non-sexed semen. The analysed characteristics included conception rate, gestation length, calf birth weight, calf vigour, stillbirth rate, and twinning rate. Data of 530 calves produced with sexed and 1,163 calves produced with non-sexed semen were analysed. The General Linear Model (GLM) was applied to assess the influence of semen type, farm, season of insemination, the calf's sex and the inseminating sire on gestation length and calf birth weight. With the exception of gestation length (P > 0.05), all other traits studied were significantly (P  lt  0.01) influenced by the type of semen. The conception rate was 55% for conventional and 44% for sexed semen, and the average gestation length was 274.6 and 274.9 days, respectively. The mean calf birth weight was 37.47 kg for non-sexed and 36.75 kg for sexed semen. The stillbirth rate was 6.19% for conventional and 7.54% for sexed semen, while the twinning rate was 3.78% for conventional and 1.13% for sexed semen. The calves produced with non-sexed and sexed semen differed significantly in viability (P  lt  0.001), the latter having a lower calf vigour score. The use of conventional semen did not affect the ratio of female and male calves (52.7:47.3%; P > 0.05); however, artificial insemination with X-sorted sexed semen significantly altered the sex ratio of calves (85.1:14.9%, P  lt  0.01). The results obtained in this investigation are in agreement with the majority of studies which compared the fertility traits, sex ratio and calf characteristics depending on the application of artificial insemination with sexed or conventional semen.
PB  - Akademiai Kiado Rt, Budapest
T2  - Acta Veterinaria Hungarica
T1  - Involuntary reduction in vigour of calves born from sexed semen
EP  - 238
IS  - 2
SP  - 229
VL  - 64
DO  - 10.1556/004.2016.023
ER  - 

@article{
author = "Djedović, Radica and Bogdanović, Vladan and Stanojević, Dragan and Nemes, Zsolt and Gaspardy, Andras and Cseh, Sandor",
year = "2016",
abstract = "The objective of this study was to compare the reproductive traits of heifers and the development characteristics of their calves following artificial insemination (AI) with sexed and non-sexed semen. The analysed characteristics included conception rate, gestation length, calf birth weight, calf vigour, stillbirth rate, and twinning rate. Data of 530 calves produced with sexed and 1,163 calves produced with non-sexed semen were analysed. The General Linear Model (GLM) was applied to assess the influence of semen type, farm, season of insemination, the calf's sex and the inseminating sire on gestation length and calf birth weight. With the exception of gestation length (P > 0.05), all other traits studied were significantly (P  lt  0.01) influenced by the type of semen. The conception rate was 55% for conventional and 44% for sexed semen, and the average gestation length was 274.6 and 274.9 days, respectively. The mean calf birth weight was 37.47 kg for non-sexed and 36.75 kg for sexed semen. The stillbirth rate was 6.19% for conventional and 7.54% for sexed semen, while the twinning rate was 3.78% for conventional and 1.13% for sexed semen. The calves produced with non-sexed and sexed semen differed significantly in viability (P  lt  0.001), the latter having a lower calf vigour score. The use of conventional semen did not affect the ratio of female and male calves (52.7:47.3%; P > 0.05); however, artificial insemination with X-sorted sexed semen significantly altered the sex ratio of calves (85.1:14.9%, P  lt  0.01). The results obtained in this investigation are in agreement with the majority of studies which compared the fertility traits, sex ratio and calf characteristics depending on the application of artificial insemination with sexed or conventional semen.",
publisher = "Akademiai Kiado Rt, Budapest",
journal = "Acta Veterinaria Hungarica",
title = "Involuntary reduction in vigour of calves born from sexed semen",
pages = "238-229",
number = "2",
volume = "64",
doi = "10.1556/004.2016.023"
}

Djedović, R., Bogdanović, V., Stanojević, D., Nemes, Z., Gaspardy, A.,& Cseh, S.. (2016). Involuntary reduction in vigour of calves born from sexed semen. in Acta Veterinaria Hungarica
Akademiai Kiado Rt, Budapest., 64(2), 229-238.
https://doi.org/10.1556/004.2016.023

Djedović R, Bogdanović V, Stanojević D, Nemes Z, Gaspardy A, Cseh S. Involuntary reduction in vigour of calves born from sexed semen. in Acta Veterinaria Hungarica. 2016;64(2):229-238.
doi:10.1556/004.2016.023 .

Djedović, Radica, Bogdanović, Vladan, Stanojević, Dragan, Nemes, Zsolt, Gaspardy, Andras, Cseh, Sandor, "Involuntary reduction in vigour of calves born from sexed semen" in Acta Veterinaria Hungarica, 64, no. 2 (2016):229-238,
https://doi.org/10.1556/004.2016.023 . .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Raguz, Nikola
AU  - Popovac, Mladen
AU  - Janković, Dobrila
AU  - Strbac, Ljuba
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4064
AB  - Assessment of the heritability coefficients of longevity traits in the population of Black and White cows was performed on a data set that included production results of 16,539 of black and white culled cows, which reached a total of 50,382 lactations in the period from 1985 to 2012. The cows were grown on 7 farms of the Agricultural Corporation Belgrade and are progeny of 277 bulls. The analysis covered the following traits: length of productive life (LPL), lifetime milk yield (LMY) and number of lactations (NL). Variance components of longevity traits were estimated using a BLUP linear mixed model with animal as a random effect. Cows included in the analysis calved for the first time in the average age of 26.86 months, while the average length of productive life amounted to 1,299.9 days and during that time the animals achieved an average of 3.04 lactations and life time production of 21,016 kg of milk. The values of the heritability coefficients of longevity traits ranged from 0.066; 0.061 and 0.074 regarding the length of productive life, lifetime milk yield and number of lactations respectively.
PB  - Croatian Dairy Union, Zagreb
T2  - Mljekarstvo
T1  - Evaluation of the heritability coefficients of longevity in the population of Black and White cows in Serbia
EP  - 329
IS  - 4
SP  - 322
VL  - 66
DO  - 10.15567/mljekarstvo.2016.0408
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Raguz, Nikola and Popovac, Mladen and Janković, Dobrila and Strbac, Ljuba",
year = "2016",
abstract = "Assessment of the heritability coefficients of longevity traits in the population of Black and White cows was performed on a data set that included production results of 16,539 of black and white culled cows, which reached a total of 50,382 lactations in the period from 1985 to 2012. The cows were grown on 7 farms of the Agricultural Corporation Belgrade and are progeny of 277 bulls. The analysis covered the following traits: length of productive life (LPL), lifetime milk yield (LMY) and number of lactations (NL). Variance components of longevity traits were estimated using a BLUP linear mixed model with animal as a random effect. Cows included in the analysis calved for the first time in the average age of 26.86 months, while the average length of productive life amounted to 1,299.9 days and during that time the animals achieved an average of 3.04 lactations and life time production of 21,016 kg of milk. The values of the heritability coefficients of longevity traits ranged from 0.066; 0.061 and 0.074 regarding the length of productive life, lifetime milk yield and number of lactations respectively.",
publisher = "Croatian Dairy Union, Zagreb",
journal = "Mljekarstvo",
title = "Evaluation of the heritability coefficients of longevity in the population of Black and White cows in Serbia",
pages = "329-322",
number = "4",
volume = "66",
doi = "10.15567/mljekarstvo.2016.0408"
}

Stanojević, D., Djedović, R., Bogdanović, V., Raguz, N., Popovac, M., Janković, D.,& Strbac, L.. (2016). Evaluation of the heritability coefficients of longevity in the population of Black and White cows in Serbia. in Mljekarstvo
Croatian Dairy Union, Zagreb., 66(4), 322-329.
https://doi.org/10.15567/mljekarstvo.2016.0408

Stanojević D, Djedović R, Bogdanović V, Raguz N, Popovac M, Janković D, Strbac L. Evaluation of the heritability coefficients of longevity in the population of Black and White cows in Serbia. in Mljekarstvo. 2016;66(4):322-329.
doi:10.15567/mljekarstvo.2016.0408 .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Raguz, Nikola, Popovac, Mladen, Janković, Dobrila, Strbac, Ljuba, "Evaluation of the heritability coefficients of longevity in the population of Black and White cows in Serbia" in Mljekarstvo, 66, no. 4 (2016):322-329,
https://doi.org/10.15567/mljekarstvo.2016.0408 . .

TY  - JOUR
AU  - Petrović, Milun D.
AU  - Bogdanović, Vladan
AU  - Petrović, Milan M.
AU  - Bogosavljević-Bošković, Snežana
AU  - Doković, Radojica
AU  - Djedović, Radica
AU  - Rakonjac, Simeon
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3797
AB  - The effect of systematic and continuous environmental factors on milk performance traits over standard lactations in 2805 Simmental cows was evaluated using the general linear model. The systematic factors included the effect of farm or breeding area, calving season, year of birth, season of birth, lactation group and their interactions. The continuous factor analysed was the effect of age at first conception. The effect of farm, lactation group and calving season on standard lactation milk performance was found to be highly significant (P lt 0.01), excepting the effect of calving season on milk fat percent in standard lactations which showed statistical significance (P lt 0.05). The interactions between year and season of birth, farm and calving season, and farm and lactation group had a highly significant effect (P lt 0.01) on all performance traits studied. Age at first conception, as a continuous factor, had a highly significant effect (P lt 0.01) on milk yield and milk fat percent, and a non-significant effect on milk fat yield. The model used to correct the performance traits over standard lactations for the effect of systematic factors was highly significant (P lt 0.01). The variance of the model accounted for 20.06 and 37.31% of the total variance of milk fat yield and milk fat percent, respectively. The resulting coefficients of determination (R-2) ranged from 0.20 for milk fat yield to 0.37 for milk fat percent.
PB  - De Gruyter Open Ltd, Warsaw
T2  - Annals of Animal Science
T1  - Effect of non-genetic factors on standard lactation milk performance traits in simmental cows
EP  - 220
IS  - 1
SP  - 211
VL  - 15
DO  - 10.2478/aoas-2014-0073
ER  - 

@article{
author = "Petrović, Milun D. and Bogdanović, Vladan and Petrović, Milan M. and Bogosavljević-Bošković, Snežana and Doković, Radojica and Djedović, Radica and Rakonjac, Simeon",
year = "2015",
abstract = "The effect of systematic and continuous environmental factors on milk performance traits over standard lactations in 2805 Simmental cows was evaluated using the general linear model. The systematic factors included the effect of farm or breeding area, calving season, year of birth, season of birth, lactation group and their interactions. The continuous factor analysed was the effect of age at first conception. The effect of farm, lactation group and calving season on standard lactation milk performance was found to be highly significant (P lt 0.01), excepting the effect of calving season on milk fat percent in standard lactations which showed statistical significance (P lt 0.05). The interactions between year and season of birth, farm and calving season, and farm and lactation group had a highly significant effect (P lt 0.01) on all performance traits studied. Age at first conception, as a continuous factor, had a highly significant effect (P lt 0.01) on milk yield and milk fat percent, and a non-significant effect on milk fat yield. The model used to correct the performance traits over standard lactations for the effect of systematic factors was highly significant (P lt 0.01). The variance of the model accounted for 20.06 and 37.31% of the total variance of milk fat yield and milk fat percent, respectively. The resulting coefficients of determination (R-2) ranged from 0.20 for milk fat yield to 0.37 for milk fat percent.",
publisher = "De Gruyter Open Ltd, Warsaw",
journal = "Annals of Animal Science",
title = "Effect of non-genetic factors on standard lactation milk performance traits in simmental cows",
pages = "220-211",
number = "1",
volume = "15",
doi = "10.2478/aoas-2014-0073"
}

Petrović, M. D., Bogdanović, V., Petrović, M. M., Bogosavljević-Bošković, S., Doković, R., Djedović, R.,& Rakonjac, S.. (2015). Effect of non-genetic factors on standard lactation milk performance traits in simmental cows. in Annals of Animal Science
De Gruyter Open Ltd, Warsaw., 15(1), 211-220.
https://doi.org/10.2478/aoas-2014-0073

Petrović MD, Bogdanović V, Petrović MM, Bogosavljević-Bošković S, Doković R, Djedović R, Rakonjac S. Effect of non-genetic factors on standard lactation milk performance traits in simmental cows. in Annals of Animal Science. 2015;15(1):211-220.
doi:10.2478/aoas-2014-0073 .

Petrović, Milun D., Bogdanović, Vladan, Petrović, Milan M., Bogosavljević-Bošković, Snežana, Doković, Radojica, Djedović, Radica, Rakonjac, Simeon, "Effect of non-genetic factors on standard lactation milk performance traits in simmental cows" in Annals of Animal Science, 15, no. 1 (2015):211-220,
https://doi.org/10.2478/aoas-2014-0073 . .

TY  - JOUR
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Perišić, Predrag
AU  - Stanojević, Dragan
AU  - Popović, Jelena
AU  - Brka, Muhamed
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3776
AB  - The quality and yield of milk, and therefore of dairy products as well, depends directly on their protein composition. Milk gene proteins represent structural locuses that are functionally associated with milk production. In cattle selection a special importance is attached to the variability of kappa casein (kappa-CN) as one of the four casein milk proteins. Genotypes of 21 Simmental breed cows, 20 crossbred cows obtained by crossing of Simmental and Red Holstein breed, and 25 cows of autochthonous Busha breed were determined for kappa casein by restriction fragment length polymorphism analysis (PCR-RFLP) of amplified DNA. The kappa-CN genotype frequencies for Simmental breed were: 42.8; 47.6 and 9.6 % for AA, AB and BB genotype, for crossbreds: 75.0; 25.0 and 0.0% and for Busha individuals: 41.7; 50.0 and 8.3 %, respectively. Frequencies of A and B alleles, assessed on the basis of genotypic frequencies were 0.667 and 0.333 for Simmental breed, 0.875 and 0.125 for crossbreds and 0.667 and 0.333 for autochthonous Busha cattle breed, respectively. For confirming the phenotypic variability of milk yield in standard lactation, yield of milk fat and the content of milk fat per kappa-CN genotypes within breeds observed the fixed model which included the breed effect, lactation in order and effect of kappa-CN genotype (AA, AB and BB) was used. The kappa-CN genotype statistically significantly (p  lt = 0.05) influenced milk yield and highly significantly (p  lt = 0.01) milk fat yield, while the content of milk fat was not statistically significantly (p >0.05) influenced in examined animals.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia
EP  - 32
IS  - 1
SP  - 23
VL  - 47
DO  - 10.2298/GENSR1501023D
ER  - 

@article{
author = "Djedović, Radica and Bogdanović, Vladan and Perišić, Predrag and Stanojević, Dragan and Popović, Jelena and Brka, Muhamed",
year = "2015",
abstract = "The quality and yield of milk, and therefore of dairy products as well, depends directly on their protein composition. Milk gene proteins represent structural locuses that are functionally associated with milk production. In cattle selection a special importance is attached to the variability of kappa casein (kappa-CN) as one of the four casein milk proteins. Genotypes of 21 Simmental breed cows, 20 crossbred cows obtained by crossing of Simmental and Red Holstein breed, and 25 cows of autochthonous Busha breed were determined for kappa casein by restriction fragment length polymorphism analysis (PCR-RFLP) of amplified DNA. The kappa-CN genotype frequencies for Simmental breed were: 42.8; 47.6 and 9.6 % for AA, AB and BB genotype, for crossbreds: 75.0; 25.0 and 0.0% and for Busha individuals: 41.7; 50.0 and 8.3 %, respectively. Frequencies of A and B alleles, assessed on the basis of genotypic frequencies were 0.667 and 0.333 for Simmental breed, 0.875 and 0.125 for crossbreds and 0.667 and 0.333 for autochthonous Busha cattle breed, respectively. For confirming the phenotypic variability of milk yield in standard lactation, yield of milk fat and the content of milk fat per kappa-CN genotypes within breeds observed the fixed model which included the breed effect, lactation in order and effect of kappa-CN genotype (AA, AB and BB) was used. The kappa-CN genotype statistically significantly (p  lt = 0.05) influenced milk yield and highly significantly (p  lt = 0.01) milk fat yield, while the content of milk fat was not statistically significantly (p >0.05) influenced in examined animals.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia",
pages = "32-23",
number = "1",
volume = "47",
doi = "10.2298/GENSR1501023D"
}

Djedović, R., Bogdanović, V., Perišić, P., Stanojević, D., Popović, J.,& Brka, M.. (2015). Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia. in Genetika
Društvo genetičara Srbije, Beograd., 47(1), 23-32.
https://doi.org/10.2298/GENSR1501023D

Djedović R, Bogdanović V, Perišić P, Stanojević D, Popović J, Brka M. Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia. in Genetika. 2015;47(1):23-32.
doi:10.2298/GENSR1501023D .

Djedović, Radica, Bogdanović, Vladan, Perišić, Predrag, Stanojević, Dragan, Popović, Jelena, Brka, Muhamed, "Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia" in Genetika, 47, no. 1 (2015):23-32,
https://doi.org/10.2298/GENSR1501023D . .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Popovac, Mladen
AU  - Perišić, Predrag
AU  - Beskorovajni, Radmila
AU  - Lazarević, M.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3900
AB  - The conducted research was aimed at constructing equations of selection index that would be used in the selection of the Holstein-Friesian breed animals in Serbia. The construction of the selection index includes the most important milk traits observed in standard lactation: milk yield (MY305), milk fat content (% MF305) and protein content (% MP305). The variance and covariance necessary for the construction of selection index are calculated using the mixed model by the method of least squares. The economic value of traits is expressed as a ratio of relative changes in costs per unit of traits included in the selection index. Livestock included in the research produced, in the first standard lactation, an average of 7681 kg of milk with 3.58% milk fat and 3.28% protein. The equation of the selection index presented in the paper is selected from the group of equations of selection index, as an equation with the highest correlation between the equation and the aggregate genotype, which amounted to 0.2156.
AB  - Sprovedeno istraživanje imalo je za cilj konstruisanje jednačine selekcijskog indeksa koja bi se koristila u odabiru grla holštajn-frizijske rase u Srbiji. U konstrukciju selekcijskog indeksa uključene su najvažnije osobine mlečnosti posmatrane u standardnoj laktaciji: prinos mleka (PM305), sadržaj mlečne masti (%MM305) i sadržaj proteina (%MP305). Varijanse i kovarijanse neophodne za konstrukciju selekcijskog indeksa izračunate su primenom mešovitog modela metodom najmanjih kvadrata. Ekonomska vrednost osobina je izražena kao odnos relativne promene troškova po jedinici osobina uključenih u selekcijski indeks. Grla obuhvaćena istraživanjem prosečno su proizvela u prvoj standardnoj laktaciji 7681 kg mleka sa 3,58 % mlečne masti i 3,28% proteina. Jednačina selekcijskog indeksa prikazana u radu odabrana je iz grupe jednačina selekcijskog indeksa, kao jednačina sa najvećom korelacijom između jednačine i agregatnog genotipa, koja je iznosila 0,2156. .
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - The potentials of using selection index in the assessment of breeding values of Holstein breeds in Serbia
T1  - Mogućnosti upotrebe selekcijskog indeksa u proceni priplodne vrednosti krava Holštajn rase u Srbiji
EP  - 532
IS  - 4
SP  - 523
VL  - 31
DO  - 10.2298/bah1504523S
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Popovac, Mladen and Perišić, Predrag and Beskorovajni, Radmila and Lazarević, M.",
year = "2015",
abstract = "The conducted research was aimed at constructing equations of selection index that would be used in the selection of the Holstein-Friesian breed animals in Serbia. The construction of the selection index includes the most important milk traits observed in standard lactation: milk yield (MY305), milk fat content (% MF305) and protein content (% MP305). The variance and covariance necessary for the construction of selection index are calculated using the mixed model by the method of least squares. The economic value of traits is expressed as a ratio of relative changes in costs per unit of traits included in the selection index. Livestock included in the research produced, in the first standard lactation, an average of 7681 kg of milk with 3.58% milk fat and 3.28% protein. The equation of the selection index presented in the paper is selected from the group of equations of selection index, as an equation with the highest correlation between the equation and the aggregate genotype, which amounted to 0.2156., Sprovedeno istraživanje imalo je za cilj konstruisanje jednačine selekcijskog indeksa koja bi se koristila u odabiru grla holštajn-frizijske rase u Srbiji. U konstrukciju selekcijskog indeksa uključene su najvažnije osobine mlečnosti posmatrane u standardnoj laktaciji: prinos mleka (PM305), sadržaj mlečne masti (%MM305) i sadržaj proteina (%MP305). Varijanse i kovarijanse neophodne za konstrukciju selekcijskog indeksa izračunate su primenom mešovitog modela metodom najmanjih kvadrata. Ekonomska vrednost osobina je izražena kao odnos relativne promene troškova po jedinici osobina uključenih u selekcijski indeks. Grla obuhvaćena istraživanjem prosečno su proizvela u prvoj standardnoj laktaciji 7681 kg mleka sa 3,58 % mlečne masti i 3,28% proteina. Jednačina selekcijskog indeksa prikazana u radu odabrana je iz grupe jednačina selekcijskog indeksa, kao jednačina sa najvećom korelacijom između jednačine i agregatnog genotipa, koja je iznosila 0,2156. .",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "The potentials of using selection index in the assessment of breeding values of Holstein breeds in Serbia, Mogućnosti upotrebe selekcijskog indeksa u proceni priplodne vrednosti krava Holštajn rase u Srbiji",
pages = "532-523",
number = "4",
volume = "31",
doi = "10.2298/bah1504523S"
}

Stanojević, D., Djedović, R., Bogdanović, V., Popovac, M., Perišić, P., Beskorovajni, R.,& Lazarević, M.. (2015). The potentials of using selection index in the assessment of breeding values of Holstein breeds in Serbia. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 31(4), 523-532.
https://doi.org/10.2298/bah1504523S

Stanojević D, Djedović R, Bogdanović V, Popovac M, Perišić P, Beskorovajni R, Lazarević M. The potentials of using selection index in the assessment of breeding values of Holstein breeds in Serbia. in Biotechnology in Animal Husbandry. 2015;31(4):523-532.
doi:10.2298/bah1504523S .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Popovac, Mladen, Perišić, Predrag, Beskorovajni, Radmila, Lazarević, M., "The potentials of using selection index in the assessment of breeding values of Holstein breeds in Serbia" in Biotechnology in Animal Husbandry, 31, no. 4 (2015):523-532,
https://doi.org/10.2298/bah1504523S . .

TY  - JOUR
AU  - Beskorovajni, Radmila
AU  - Djedović, Radica
AU  - Stojić, Petar
AU  - Novaković, Željko
AU  - Stanojević, Dragan
AU  - Popović, Nikola
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3945
AB  - Improving the genetic capacity for highyielding, highquality and profitable milk production is the priority of countries with cattle production.Due to their marked phenotypic and genetic variability, milk production traits are particularly important in all breeding and improvement programmes. The paper presents the average values and phenotypic variability of major milk production traits examined in the first three complete and standard lactations, as well as the effect of systemic environmental factors on the expression of these traits. The bull-sire, farm, year, calving season and lactation sequence had a highly significant effect on the studiedmilk production parameters (P  lt 0.01). The paper also shows the heritability of milk production parameters, calculated with the method of least squares (LS) and the REML method. The coefficients of heritability for milk yield, milk fat content, fat yield and 4% in the standard lactation, calculated with the method of least squares, were 0.109; 0.047; 0.098 and 0.106, respectively. The coefficients of heritability calculated with the REML method were higher for all milk production traits in the standard lactation, being 0.148; 0.086; 0.128, and 0.138, respectively.
AB  - U zemljama koje se bave govedarskom proizvodnjom primaran značaj se daje unapređenju genetskih kapaciteta za visoku, kvalitetnu i ekonomski isplativu proizvodnju mleka. Osobine mlečnosti zbog izražene fenotipske i genetske varijabilnosti imaju poseban značaj u svim programima selekcije i oplemenjivanja. U radu su prikazane prosečne vrednosti i fenotipska varijabilnost važnijih osobina mlečnosti ispitivanih u prve tri cele i standardne laktacije, kao i uticaj sistematskih faktora okoline na ispoljenost ovih svojstava. Ustanovljen je visoko značajan uticaj bika-oca, farme, godine, sezone teljenja i redosleda laktacije na ispoljenost posmatranih osobina mlečnosti (P lt 0,01). Prikazana je i naslednost posmatranih osobina mlečnosti, ustanovljena primenom metode najmanjih kvadrata (LS) i REML metodom.Heritabiliteti dobijeni primenom metode najmanjih kvadrata za prinos mleka, sadržaj mlečne masti, prinos mlečne masti i 4% MKM u standardnoj laktaciji bili su 0,109; 0,047; 0,098 i 0,106, respektivno. Koeficijenti naslednosti dobijeni REML metodom imali su veće vrednosti za sve osobine mlečnosti u standardnoj laktaciji: 0,148; 0,086; 0,128 i 0,138, po istom redosledu osobina.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Phenotypic and genetic variability of milk production traits of the black-and-white dairy cattle breed in the first three complete and standard lactations
T1  - Fenotipska i genetska varijabilnost osobina mlečnosti krava oplemenjene crno bele rase u prve tri cele i standardne laktacije
EP  - 53
IS  - 3-4
SP  - 47
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3945
ER  - 

@article{
author = "Beskorovajni, Radmila and Djedović, Radica and Stojić, Petar and Novaković, Željko and Stanojević, Dragan and Popović, Nikola",
year = "2015",
abstract = "Improving the genetic capacity for highyielding, highquality and profitable milk production is the priority of countries with cattle production.Due to their marked phenotypic and genetic variability, milk production traits are particularly important in all breeding and improvement programmes. The paper presents the average values and phenotypic variability of major milk production traits examined in the first three complete and standard lactations, as well as the effect of systemic environmental factors on the expression of these traits. The bull-sire, farm, year, calving season and lactation sequence had a highly significant effect on the studiedmilk production parameters (P  lt 0.01). The paper also shows the heritability of milk production parameters, calculated with the method of least squares (LS) and the REML method. The coefficients of heritability for milk yield, milk fat content, fat yield and 4% in the standard lactation, calculated with the method of least squares, were 0.109; 0.047; 0.098 and 0.106, respectively. The coefficients of heritability calculated with the REML method were higher for all milk production traits in the standard lactation, being 0.148; 0.086; 0.128, and 0.138, respectively., U zemljama koje se bave govedarskom proizvodnjom primaran značaj se daje unapređenju genetskih kapaciteta za visoku, kvalitetnu i ekonomski isplativu proizvodnju mleka. Osobine mlečnosti zbog izražene fenotipske i genetske varijabilnosti imaju poseban značaj u svim programima selekcije i oplemenjivanja. U radu su prikazane prosečne vrednosti i fenotipska varijabilnost važnijih osobina mlečnosti ispitivanih u prve tri cele i standardne laktacije, kao i uticaj sistematskih faktora okoline na ispoljenost ovih svojstava. Ustanovljen je visoko značajan uticaj bika-oca, farme, godine, sezone teljenja i redosleda laktacije na ispoljenost posmatranih osobina mlečnosti (P lt 0,01). Prikazana je i naslednost posmatranih osobina mlečnosti, ustanovljena primenom metode najmanjih kvadrata (LS) i REML metodom.Heritabiliteti dobijeni primenom metode najmanjih kvadrata za prinos mleka, sadržaj mlečne masti, prinos mlečne masti i 4% MKM u standardnoj laktaciji bili su 0,109; 0,047; 0,098 i 0,106, respektivno. Koeficijenti naslednosti dobijeni REML metodom imali su veće vrednosti za sve osobine mlečnosti u standardnoj laktaciji: 0,148; 0,086; 0,128 i 0,138, po istom redosledu osobina.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Phenotypic and genetic variability of milk production traits of the black-and-white dairy cattle breed in the first three complete and standard lactations, Fenotipska i genetska varijabilnost osobina mlečnosti krava oplemenjene crno bele rase u prve tri cele i standardne laktacije",
pages = "53-47",
number = "3-4",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3945"
}

Beskorovajni, R., Djedović, R., Stojić, P., Novaković, Ž., Stanojević, D.,& Popović, N.. (2015). Phenotypic and genetic variability of milk production traits of the black-and-white dairy cattle breed in the first three complete and standard lactations. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 21(3-4), 47-53.
https://hdl.handle.net/21.15107/rcub_agrospace_3945

Beskorovajni R, Djedović R, Stojić P, Novaković Ž, Stanojević D, Popović N. Phenotypic and genetic variability of milk production traits of the black-and-white dairy cattle breed in the first three complete and standard lactations. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2015;21(3-4):47-53.
https://hdl.handle.net/21.15107/rcub_agrospace_3945 .

Beskorovajni, Radmila, Djedović, Radica, Stojić, Petar, Novaković, Željko, Stanojević, Dragan, Popović, Nikola, "Phenotypic and genetic variability of milk production traits of the black-and-white dairy cattle breed in the first three complete and standard lactations" in Zbornik naučnih radova Instituta PKB Agroekonomik, 21, no. 3-4 (2015):47-53,
https://hdl.handle.net/21.15107/rcub_agrospace_3945 .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Popovac, Mladen
AU  - Perišić, Predrag
AU  - Beskorovajni, Radmila
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3946
AB  - The objective of this study was a construction of selection index on the basis of whose score the cows could be graded during their selection and formation of parent pairs. The most important milk yield traits in standard lactation: milk yield (PM305), milk fat content (%MM305) and protein content (%MP305) were included in the construction of selection index. Variances and covariances deemed necessary for construction of selection index were calculated by use of the mixed model of the Least Squares method. Economic value of the traits was expressed as a relationship of relative cost changes per unit of the traits included in the selection index. The individuals included in the trial on average produced 8261 kg milk with 294.14 kg milk fat and 270.07 kg protein in standard lactation. Equation of selection index used in this study was chosen from a set of selection index equations, as an equation having the highest correlation between the equation and aggregate genotype which amounted to 0.4275.
AB  - Cilj istraživanja bila je konstrukcija selekcijskog indeksa, na osnovu čijeg skora bi se mogle rangirati krave prilikom njihovog odabira i formiranja roditeljskih parova. U konstrukciju selekcijskog indeksa uključene su najvažnije osobine mlečnosti posmatrane u standardnoj laktaciji: prinos mleka (PM305), sadržaj mlečne masti (%MM305) i sadržaj proteina (%MP305). Varijanse i kovarijanse neophodne za konstrukciju selekcijskog indeksa izračunate su primenom mešovitog modela metodom najmanjih kvadrata. Ekonomska vrednost osobina je izražena kao odnos relativne promene troškova po jedinici osobina uključenih u selekcijski indeks. Grla obuhvaćena istraživanjem prosečno su proizvela u standardnoj laktaciji 8261 kg mleka sa 294,14 kg mlečne masti i 270,07 kg proteina. Jednačina selekcijskog indeksa prikazana u radu odabrana je iz grupe jednacina selekcijskog indeksa, kao jednacina sa najvećom korelacijom između jednačine i agregatnog genotipa, koja je iznosila 0,4275.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - The assessment of breeding value in black and white cattle by use of selection index
T1  - Procena priplodne vrednosti krava crno-bele rase upotrebom selekcijskog indeksa
EP  - 45
IS  - 3-4
SP  - 39
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3946
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Popovac, Mladen and Perišić, Predrag and Beskorovajni, Radmila",
year = "2015",
abstract = "The objective of this study was a construction of selection index on the basis of whose score the cows could be graded during their selection and formation of parent pairs. The most important milk yield traits in standard lactation: milk yield (PM305), milk fat content (%MM305) and protein content (%MP305) were included in the construction of selection index. Variances and covariances deemed necessary for construction of selection index were calculated by use of the mixed model of the Least Squares method. Economic value of the traits was expressed as a relationship of relative cost changes per unit of the traits included in the selection index. The individuals included in the trial on average produced 8261 kg milk with 294.14 kg milk fat and 270.07 kg protein in standard lactation. Equation of selection index used in this study was chosen from a set of selection index equations, as an equation having the highest correlation between the equation and aggregate genotype which amounted to 0.4275., Cilj istraživanja bila je konstrukcija selekcijskog indeksa, na osnovu čijeg skora bi se mogle rangirati krave prilikom njihovog odabira i formiranja roditeljskih parova. U konstrukciju selekcijskog indeksa uključene su najvažnije osobine mlečnosti posmatrane u standardnoj laktaciji: prinos mleka (PM305), sadržaj mlečne masti (%MM305) i sadržaj proteina (%MP305). Varijanse i kovarijanse neophodne za konstrukciju selekcijskog indeksa izračunate su primenom mešovitog modela metodom najmanjih kvadrata. Ekonomska vrednost osobina je izražena kao odnos relativne promene troškova po jedinici osobina uključenih u selekcijski indeks. Grla obuhvaćena istraživanjem prosečno su proizvela u standardnoj laktaciji 8261 kg mleka sa 294,14 kg mlečne masti i 270,07 kg proteina. Jednačina selekcijskog indeksa prikazana u radu odabrana je iz grupe jednacina selekcijskog indeksa, kao jednacina sa najvećom korelacijom između jednačine i agregatnog genotipa, koja je iznosila 0,4275.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "The assessment of breeding value in black and white cattle by use of selection index, Procena priplodne vrednosti krava crno-bele rase upotrebom selekcijskog indeksa",
pages = "45-39",
number = "3-4",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3946"
}

Stanojević, D., Djedović, R., Bogdanović, V., Popovac, M., Perišić, P.,& Beskorovajni, R.. (2015). The assessment of breeding value in black and white cattle by use of selection index. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 21(3-4), 39-45.
https://hdl.handle.net/21.15107/rcub_agrospace_3946

Stanojević D, Djedović R, Bogdanović V, Popovac M, Perišić P, Beskorovajni R. The assessment of breeding value in black and white cattle by use of selection index. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2015;21(3-4):39-45.
https://hdl.handle.net/21.15107/rcub_agrospace_3946 .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Popovac, Mladen, Perišić, Predrag, Beskorovajni, Radmila, "The assessment of breeding value in black and white cattle by use of selection index" in Zbornik naučnih radova Instituta PKB Agroekonomik, 21, no. 3-4 (2015):39-45,
https://hdl.handle.net/21.15107/rcub_agrospace_3946 .

TY  - CONF
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Stanojević, D.
AU  - Samolovac, Lj
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5539
AB  - Sperm sexing is a relatively new biotechnological procedure which offers us the possibility to choose the offspring sex. This method is widely used today in the insemination of the dairy cattle breeds and it is based on the difference in total DNA quantity between X and Y chromosome spermatozoa. In this research paper we have analysed the fertility, sex ratio and characteristics of female  Black and White breed calves inseminated by the sexed sperm produced by 6 bulls on 6 commercial farms of the PK Belgrade. Conception rate was 44% with average gestation length of 274.9 days. Average calf birth weight was 36.75 kg. The stillbirths and twinning rates were 7.16 and 1.13%, respectively. Artificial insemination by sexed sperm assessed by c2 test highly significantly (P lt 0.01) alters the sex ratio between female and male calves (85:15%). By means of GL model we have assessed the effects of farm, insemination season, sex of the calves and  inseminating bull on gestation length and calf birth weight. All mentioned factors have manifested statistical significance (P lt 0.01) on studied traits, except for the inseminating bull trait which did not statistically significantly affect (P>0.05) gestation length. Regardless the low conception rate, the application of sexed sperm in dairy cattle breeding is very significant since it enables the breeders to use the best replacement female animals what may result in the improvement of genetic basis of breeding stock.
C3  - International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia
T1  - The Effect of the Use of Sexed Semen on Reproductive Traits and Sex Ratio of Black and White Calves
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5539
ER  - 

@conference{
author = "Djedović, Radica and Bogdanović, Vladan and Stanojević, D. and Samolovac, Lj",
year = "2014",
abstract = "Sperm sexing is a relatively new biotechnological procedure which offers us the possibility to choose the offspring sex. This method is widely used today in the insemination of the dairy cattle breeds and it is based on the difference in total DNA quantity between X and Y chromosome spermatozoa. In this research paper we have analysed the fertility, sex ratio and characteristics of female  Black and White breed calves inseminated by the sexed sperm produced by 6 bulls on 6 commercial farms of the PK Belgrade. Conception rate was 44% with average gestation length of 274.9 days. Average calf birth weight was 36.75 kg. The stillbirths and twinning rates were 7.16 and 1.13%, respectively. Artificial insemination by sexed sperm assessed by c2 test highly significantly (P lt 0.01) alters the sex ratio between female and male calves (85:15%). By means of GL model we have assessed the effects of farm, insemination season, sex of the calves and  inseminating bull on gestation length and calf birth weight. All mentioned factors have manifested statistical significance (P lt 0.01) on studied traits, except for the inseminating bull trait which did not statistically significantly affect (P>0.05) gestation length. Regardless the low conception rate, the application of sexed sperm in dairy cattle breeding is very significant since it enables the breeders to use the best replacement female animals what may result in the improvement of genetic basis of breeding stock.",
journal = "International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia",
title = "The Effect of the Use of Sexed Semen on Reproductive Traits and Sex Ratio of Black and White Calves",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5539"
}

Djedović, R., Bogdanović, V., Stanojević, D.,& Samolovac, L.. (2014). The Effect of the Use of Sexed Semen on Reproductive Traits and Sex Ratio of Black and White Calves. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia.
https://hdl.handle.net/21.15107/rcub_agrospace_5539

Djedović R, Bogdanović V, Stanojević D, Samolovac L. The Effect of the Use of Sexed Semen on Reproductive Traits and Sex Ratio of Black and White Calves. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia. 2014;.
https://hdl.handle.net/21.15107/rcub_agrospace_5539 .

Djedović, Radica, Bogdanović, Vladan, Stanojević, D., Samolovac, Lj, "The Effect of the Use of Sexed Semen on Reproductive Traits and Sex Ratio of Black and White Calves" in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia (2014),
https://hdl.handle.net/21.15107/rcub_agrospace_5539 .

TY  - CONF
AU  - Bogdanović, Vladan
AU  - Djedović, Radica
AU  - Perišić, Predrag
AU  - Stanojević, Dragan
AU  - Zarić, Vlade
AU  - Petrović, Milun D.
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3528
AB  - Agriculture and food processing are most important branches of the economy in Republic of Serbia and account for 17% of gross domestic product (10.6% agricultural production and 6.4% food processing). In agriculture, 70% of production comes from plants and 30% from livestock. Annual consumption per capita in Serbia is 56 l milk and 38 kg meat products (18 kg of poultry, 16 kg of pork and 4 kg of beef). To obtain a more precise description of the dairy and beef sectors, as well as data for improving zoo-technical and farm conditions for ruminant production, a survey was conducted amongst farmers. A total of 1,180 questionnaires were mailed to farmers whose farms are registered for cattle, sheep, goat or mixed farming production. The questionnaire was divided into 6 sections: (1) general information about the farm; (2) technical and structural information; (3) education and advisory services; (4) perspectives for future activities; (5) sanitary and veterinary information; and (6) zoo-technical aspects. For more than 70% of farmers livestock production is the only source of income. One of the main structural problems which impede efficient development of ruminant production is the small scale of operation. A small property, with a small arable area results in a smaller number of animals being kept. About 37% of farmers have 10 or fewer cows on their farms, less than 20% of farmers have more than 20 sheep, and goat keeping is the least represented sector. Farmers and breeders associations are very fragmented and are not able to support their members in an effective way. About 75% of farmers expressed a positive expectation about future membership of Serbia in the EU, although these expectations are not clearly defined.
PB  - Wageningen Acad Publ, Wageningen
C3  - Cattle Husbandry in Eastern Europe and China: Structure, Development Paths and Optimisation
T1  - An assessment of efficiency and prospects for the cattle sectors in Serbia
EP  - 211
IS  - 135
SP  - 201
DO  - 10.3920/978-90-8686-785-1_16
ER  - 

@conference{
author = "Bogdanović, Vladan and Djedović, Radica and Perišić, Predrag and Stanojević, Dragan and Zarić, Vlade and Petrović, Milun D.",
year = "2014",
abstract = "Agriculture and food processing are most important branches of the economy in Republic of Serbia and account for 17% of gross domestic product (10.6% agricultural production and 6.4% food processing). In agriculture, 70% of production comes from plants and 30% from livestock. Annual consumption per capita in Serbia is 56 l milk and 38 kg meat products (18 kg of poultry, 16 kg of pork and 4 kg of beef). To obtain a more precise description of the dairy and beef sectors, as well as data for improving zoo-technical and farm conditions for ruminant production, a survey was conducted amongst farmers. A total of 1,180 questionnaires were mailed to farmers whose farms are registered for cattle, sheep, goat or mixed farming production. The questionnaire was divided into 6 sections: (1) general information about the farm; (2) technical and structural information; (3) education and advisory services; (4) perspectives for future activities; (5) sanitary and veterinary information; and (6) zoo-technical aspects. For more than 70% of farmers livestock production is the only source of income. One of the main structural problems which impede efficient development of ruminant production is the small scale of operation. A small property, with a small arable area results in a smaller number of animals being kept. About 37% of farmers have 10 or fewer cows on their farms, less than 20% of farmers have more than 20 sheep, and goat keeping is the least represented sector. Farmers and breeders associations are very fragmented and are not able to support their members in an effective way. About 75% of farmers expressed a positive expectation about future membership of Serbia in the EU, although these expectations are not clearly defined.",
publisher = "Wageningen Acad Publ, Wageningen",
journal = "Cattle Husbandry in Eastern Europe and China: Structure, Development Paths and Optimisation",
title = "An assessment of efficiency and prospects for the cattle sectors in Serbia",
pages = "211-201",
number = "135",
doi = "10.3920/978-90-8686-785-1_16"
}

Bogdanović, V., Djedović, R., Perišić, P., Stanojević, D., Zarić, V.,& Petrović, M. D.. (2014). An assessment of efficiency and prospects for the cattle sectors in Serbia. in Cattle Husbandry in Eastern Europe and China: Structure, Development Paths and Optimisation
Wageningen Acad Publ, Wageningen.(135), 201-211.
https://doi.org/10.3920/978-90-8686-785-1_16

Bogdanović V, Djedović R, Perišić P, Stanojević D, Zarić V, Petrović MD. An assessment of efficiency and prospects for the cattle sectors in Serbia. in Cattle Husbandry in Eastern Europe and China: Structure, Development Paths and Optimisation. 2014;(135):201-211.
doi:10.3920/978-90-8686-785-1_16 .

Bogdanović, Vladan, Djedović, Radica, Perišić, Predrag, Stanojević, Dragan, Zarić, Vlade, Petrović, Milun D., "An assessment of efficiency and prospects for the cattle sectors in Serbia" in Cattle Husbandry in Eastern Europe and China: Structure, Development Paths and Optimisation, no. 135 (2014):201-211,
https://doi.org/10.3920/978-90-8686-785-1_16 . .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Perišić, Predrag
AU  - Beskorovajni, Radmila
AU  - Popovac, Mladen
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3666
AB  - Well planned breeding program refers to achieving the advancement through selection of milking cattle. One of the most significant parameters of achieved results was the selection effect. The aim of this research was to show potential selection results which can be achieved in optimized breeding conditions for domestic population of milking cattle. Potential effects for the most important milk yield traits were estimated in standard lactation: milk yield, milk fat content and milk fat yield. Values of parameters that were used during the estimation were taken based on data from literature that engages in this type of research. Estimated selection effects in simulation I for milk yield, milk fat content and milk fat yield were 134,84 kg; 0,0258% i 4,95 kg. In second simulation estimated selection effect for same traits was: 217,55 kg; 0,029% i 7,87 kg. Results of conducted simulation point out at significant potential, meaning that in future period in order to put that potential to realization certain conditions have to be created by selective breeding work.
AB  - Dobro osmišljen odgajivački program ima za cilj postizanje selekcijskog napretka u populacijama mlečnih goveda. Jedan od najznačajnijih pokazatelja rezulata postignutih na ovaj način jeste efekat selekcije. Cilj rada bio je da prikaže potencijalne rezulate selekcije koji se mogu postići u domaćoj populaciji mlečnih goveda u optimizovanim uslovima odgajivanja. Procenjeni su potencijalni efekti za najvažnije osobine mlečnosti u standardnoj laktaciji: prinos mleka, sadržaj mlečne masti i prinos mlečne masti. Vrednosti parametara korišćenih prilikom procene uzeti su na osnovu podataka iz literature koja se bavi ovom problematikom. Procenjeni efekti selekcije u simulaciji I za osobine prinos mleka, sadržaj mlečne masti i prinos mlečne masti iznosili su 134,84 kg; 0,0258% i 4,95 kg. U smulaciji II procenjeni efekat selekcije za iste osobine bio je: 217,55 kg; 0,029% i 7,87 kg. Rezultati urađene simulacije ukazuju na značajan potencijal, te u narednom periodu trebalo bi odgajivačkim radom stvoriti uslove kako bi se značajan deo tog potencijala i realizovao.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Estimation of the sellection effects on milk yield traits of black and white cattle in optimized breeding conditions
T1  - Procena efekata selekcije za osobine mlečnosti u optimizovanim uslovima odgajivanja u populaciji crno-belih goveda
EP  - 163
IS  - 1-4
SP  - 157
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3666
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Perišić, Predrag and Beskorovajni, Radmila and Popovac, Mladen",
year = "2014",
abstract = "Well planned breeding program refers to achieving the advancement through selection of milking cattle. One of the most significant parameters of achieved results was the selection effect. The aim of this research was to show potential selection results which can be achieved in optimized breeding conditions for domestic population of milking cattle. Potential effects for the most important milk yield traits were estimated in standard lactation: milk yield, milk fat content and milk fat yield. Values of parameters that were used during the estimation were taken based on data from literature that engages in this type of research. Estimated selection effects in simulation I for milk yield, milk fat content and milk fat yield were 134,84 kg; 0,0258% i 4,95 kg. In second simulation estimated selection effect for same traits was: 217,55 kg; 0,029% i 7,87 kg. Results of conducted simulation point out at significant potential, meaning that in future period in order to put that potential to realization certain conditions have to be created by selective breeding work., Dobro osmišljen odgajivački program ima za cilj postizanje selekcijskog napretka u populacijama mlečnih goveda. Jedan od najznačajnijih pokazatelja rezulata postignutih na ovaj način jeste efekat selekcije. Cilj rada bio je da prikaže potencijalne rezulate selekcije koji se mogu postići u domaćoj populaciji mlečnih goveda u optimizovanim uslovima odgajivanja. Procenjeni su potencijalni efekti za najvažnije osobine mlečnosti u standardnoj laktaciji: prinos mleka, sadržaj mlečne masti i prinos mlečne masti. Vrednosti parametara korišćenih prilikom procene uzeti su na osnovu podataka iz literature koja se bavi ovom problematikom. Procenjeni efekti selekcije u simulaciji I za osobine prinos mleka, sadržaj mlečne masti i prinos mlečne masti iznosili su 134,84 kg; 0,0258% i 4,95 kg. U smulaciji II procenjeni efekat selekcije za iste osobine bio je: 217,55 kg; 0,029% i 7,87 kg. Rezultati urađene simulacije ukazuju na značajan potencijal, te u narednom periodu trebalo bi odgajivačkim radom stvoriti uslove kako bi se značajan deo tog potencijala i realizovao.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Estimation of the sellection effects on milk yield traits of black and white cattle in optimized breeding conditions, Procena efekata selekcije za osobine mlečnosti u optimizovanim uslovima odgajivanja u populaciji crno-belih goveda",
pages = "163-157",
number = "1-4",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3666"
}

Stanojević, D., Djedović, R., Bogdanović, V., Perišić, P., Beskorovajni, R.,& Popovac, M.. (2014). Estimation of the sellection effects on milk yield traits of black and white cattle in optimized breeding conditions. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 20(1-4), 157-163.
https://hdl.handle.net/21.15107/rcub_agrospace_3666

Stanojević D, Djedović R, Bogdanović V, Perišić P, Beskorovajni R, Popovac M. Estimation of the sellection effects on milk yield traits of black and white cattle in optimized breeding conditions. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2014;20(1-4):157-163.
https://hdl.handle.net/21.15107/rcub_agrospace_3666 .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Perišić, Predrag, Beskorovajni, Radmila, Popovac, Mladen, "Estimation of the sellection effects on milk yield traits of black and white cattle in optimized breeding conditions" in Zbornik naučnih radova Instituta PKB Agroekonomik, 20, no. 1-4 (2014):157-163,
https://hdl.handle.net/21.15107/rcub_agrospace_3666 .

TY  - JOUR
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Trifunović, Gligorije
AU  - Beskorovajni, Radmila
AU  - Stanojević, Dragan
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3101
AB  - Genetic parameters (heritability coefficients and genetic correlations) of the type of calving, number of stillbirths and birth weight have been evaluated in the population of Holstein Friesian cattle breed. Data sets have been analysed by means of the Mixed Least Square Model (LSMLMW). Besides a random effect of bull-sires, the model has also included the fixed effects of farm, season, sex, the evaluation of viability of calves and types of birth. Estimated heritability values and heritability errors for the type of calving (TC), number of stillbirths (SB) and birth weight (BWT) were low: 0.190 ± 0.062; 0.018 ± 0.006 and 0.149 ± 0.051, respectively. Heritabilities of the analysed traits were evaluated on the grounds of the calves` bull-sires additive value (direct heritability). The values of the genetic correlation coefficients between examined traits ranged from - 0.251 (correlation between the type of calving and number of stillbirths) to 0.340 (correlation between the number of stillbirths and birth weight).
AB  - Genetski parametri (koeficijent heritabiliteta i genetske korelacije) tipa teljenja, broja mrtvorođene teladi i telesne mase pri rođenju ocenjeni su u populaciji krava holštajn frizijske rase. Setovi podataka analizirani su putem mešovitog modela najmanjih kvadrata (LSMLMW). Model je pored slučajnog uticaja bikova-očeva obuhvatao fiksne uticaje farme, sezone, pola, ocene vitalnosti teladi i tipa rođenja. Ocenjeni heritabiliteti i njihove greške za tip teljenja, broj mrtvorođene teladi i telesnu masu pri rođenju bili su niski i iznosili su: 0,190 ± 0,062; 0,018 ± 0,006 i 0,149 ± 0,051, odgovarajuće. Heritabiliteti analiziranih osobina ocenjeni su na osnovu aditivne vrednosti očeva teladi (direktan heritabilitet). Koeficijenti genetskih korelacija između ispitivanih osobina imali su vrednosti od -0,251 (povezanost tipa teljenja i broja mrtvorođene teladi) do 0,340 (povezanost broja mrtvorođene teladi i telesne mase pri rođenju).
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - The evaluation of genetic parameters of the type of calving in the population of Holstein Friesian cows
T1  - Genetski parametari osobina teljenja u populaciji holštajn frizijskih krava
EP  - 49
IS  - 1
SP  - 41
VL  - 45
DO  - 10.2298/GENSR1301041D
ER  - 

@article{
author = "Djedović, Radica and Bogdanović, Vladan and Trifunović, Gligorije and Beskorovajni, Radmila and Stanojević, Dragan",
year = "2013",
abstract = "Genetic parameters (heritability coefficients and genetic correlations) of the type of calving, number of stillbirths and birth weight have been evaluated in the population of Holstein Friesian cattle breed. Data sets have been analysed by means of the Mixed Least Square Model (LSMLMW). Besides a random effect of bull-sires, the model has also included the fixed effects of farm, season, sex, the evaluation of viability of calves and types of birth. Estimated heritability values and heritability errors for the type of calving (TC), number of stillbirths (SB) and birth weight (BWT) were low: 0.190 ± 0.062; 0.018 ± 0.006 and 0.149 ± 0.051, respectively. Heritabilities of the analysed traits were evaluated on the grounds of the calves` bull-sires additive value (direct heritability). The values of the genetic correlation coefficients between examined traits ranged from - 0.251 (correlation between the type of calving and number of stillbirths) to 0.340 (correlation between the number of stillbirths and birth weight)., Genetski parametri (koeficijent heritabiliteta i genetske korelacije) tipa teljenja, broja mrtvorođene teladi i telesne mase pri rođenju ocenjeni su u populaciji krava holštajn frizijske rase. Setovi podataka analizirani su putem mešovitog modela najmanjih kvadrata (LSMLMW). Model je pored slučajnog uticaja bikova-očeva obuhvatao fiksne uticaje farme, sezone, pola, ocene vitalnosti teladi i tipa rođenja. Ocenjeni heritabiliteti i njihove greške za tip teljenja, broj mrtvorođene teladi i telesnu masu pri rođenju bili su niski i iznosili su: 0,190 ± 0,062; 0,018 ± 0,006 i 0,149 ± 0,051, odgovarajuće. Heritabiliteti analiziranih osobina ocenjeni su na osnovu aditivne vrednosti očeva teladi (direktan heritabilitet). Koeficijenti genetskih korelacija između ispitivanih osobina imali su vrednosti od -0,251 (povezanost tipa teljenja i broja mrtvorođene teladi) do 0,340 (povezanost broja mrtvorođene teladi i telesne mase pri rođenju).",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "The evaluation of genetic parameters of the type of calving in the population of Holstein Friesian cows, Genetski parametari osobina teljenja u populaciji holštajn frizijskih krava",
pages = "49-41",
number = "1",
volume = "45",
doi = "10.2298/GENSR1301041D"
}

Djedović, R., Bogdanović, V., Trifunović, G., Beskorovajni, R.,& Stanojević, D.. (2013). The evaluation of genetic parameters of the type of calving in the population of Holstein Friesian cows. in Genetika
Društvo genetičara Srbije, Beograd., 45(1), 41-49.
https://doi.org/10.2298/GENSR1301041D

Djedović R, Bogdanović V, Trifunović G, Beskorovajni R, Stanojević D. The evaluation of genetic parameters of the type of calving in the population of Holstein Friesian cows. in Genetika. 2013;45(1):41-49.
doi:10.2298/GENSR1301041D .

Djedović, Radica, Bogdanović, Vladan, Trifunović, Gligorije, Beskorovajni, Radmila, Stanojević, Dragan, "The evaluation of genetic parameters of the type of calving in the population of Holstein Friesian cows" in Genetika, 45, no. 1 (2013):41-49,
https://doi.org/10.2298/GENSR1301041D . .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Perišić, Predrag
AU  - Beskorovajni, Radmila
AU  - Popovac, Mladen
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3366
AB  - In order to conduct selection on the larger number of traits, that are significant from the economic aspect, it is necessary to know the direction and strength of correlation between observed traits. In this research average values and variability of the most significant milk yield traits as well as coefficients of genetic and phenotype correlations are described. This research was conducted on 1369 cows that had finished their first three lactations in period from 2006 to 2010th year. Cattle were bread at 7 farms of Agricultural Corporation Belgrade and they are descendants of 29 bulls. The following traits were researched: milk yield, milk fat content and milk fat yield. Obtained genetic correlation values in this research were from -0.375 between milk fat content in entire lactation and milk yield in standard lactation, up to 0.998 for milk fat content in entire and standard lactation. Obtained phenotype correlation values were from -0.207 between milk yield in standard lactation and milk fat content in entire lactation up to 0.958 between milk yield and milk fat content in entire lactation.
AB  - U cilju sprovođenja selekcije na veći broj osobina, koje imaju primarni značaj sa ekonomskog aspekta proizvodnje mleka, neophodno je poznavanje smera i jačine povezanosti između osobina. U radu su prikazane prosečne vrednosti i varijabilnost najvažnijih osobina mlečnosti, kao i koeficijenti fenotipskih i genetskih korelacija. Istraživanjem je obuhvaćeno 1369 grla koja su imala zaključene prve tri laktacije u periodu od 2006. do 2010. godine. Grla su gajena na 7 farmi Poljoprivredne korporacije Beograd i potomci su 29 bikova-očeva. Istraživanjem su obuhvaćene sledeće osobine mlečnosti: prinos mleka, sadržaj mlečne masti i prinos mlečne masti. Vrednosti koeficijenata fenotipskih korelacija imali su vrednosti od - 0.207 između prinosa mleka u standardnoj laktaciji i sadržaja mlečne masti u celoj laktaciji, do 0.958 između prinosa mleka i prinosa mlečne masti u celoj laktaciji. Vrednosti genetskih korelacija utvrđeni u istraživanju imali su vrednosti od -0.375 između sadržaja mlečne masti u celoj laktaciji i prinosa mleka u standardnoj laktaciji, do 0.998 za sadržaj mlečne masti u celoj i standardnoj laktaciji.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Phenotype and genetic correlation between milk yield traits in first three consecutive lactations of black and white cows
T1  - Fenotipska i genetska povezanost osobina mlečnosti u prve tri uzastopne laktacije crno belih krava
EP  - 24
IS  - 3-4
SP  - 17
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3366
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Perišić, Predrag and Beskorovajni, Radmila and Popovac, Mladen",
year = "2013",
abstract = "In order to conduct selection on the larger number of traits, that are significant from the economic aspect, it is necessary to know the direction and strength of correlation between observed traits. In this research average values and variability of the most significant milk yield traits as well as coefficients of genetic and phenotype correlations are described. This research was conducted on 1369 cows that had finished their first three lactations in period from 2006 to 2010th year. Cattle were bread at 7 farms of Agricultural Corporation Belgrade and they are descendants of 29 bulls. The following traits were researched: milk yield, milk fat content and milk fat yield. Obtained genetic correlation values in this research were from -0.375 between milk fat content in entire lactation and milk yield in standard lactation, up to 0.998 for milk fat content in entire and standard lactation. Obtained phenotype correlation values were from -0.207 between milk yield in standard lactation and milk fat content in entire lactation up to 0.958 between milk yield and milk fat content in entire lactation., U cilju sprovođenja selekcije na veći broj osobina, koje imaju primarni značaj sa ekonomskog aspekta proizvodnje mleka, neophodno je poznavanje smera i jačine povezanosti između osobina. U radu su prikazane prosečne vrednosti i varijabilnost najvažnijih osobina mlečnosti, kao i koeficijenti fenotipskih i genetskih korelacija. Istraživanjem je obuhvaćeno 1369 grla koja su imala zaključene prve tri laktacije u periodu od 2006. do 2010. godine. Grla su gajena na 7 farmi Poljoprivredne korporacije Beograd i potomci su 29 bikova-očeva. Istraživanjem su obuhvaćene sledeće osobine mlečnosti: prinos mleka, sadržaj mlečne masti i prinos mlečne masti. Vrednosti koeficijenata fenotipskih korelacija imali su vrednosti od - 0.207 između prinosa mleka u standardnoj laktaciji i sadržaja mlečne masti u celoj laktaciji, do 0.958 između prinosa mleka i prinosa mlečne masti u celoj laktaciji. Vrednosti genetskih korelacija utvrđeni u istraživanju imali su vrednosti od -0.375 između sadržaja mlečne masti u celoj laktaciji i prinosa mleka u standardnoj laktaciji, do 0.998 za sadržaj mlečne masti u celoj i standardnoj laktaciji.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Phenotype and genetic correlation between milk yield traits in first three consecutive lactations of black and white cows, Fenotipska i genetska povezanost osobina mlečnosti u prve tri uzastopne laktacije crno belih krava",
pages = "24-17",
number = "3-4",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3366"
}

Stanojević, D., Djedović, R., Bogdanović, V., Perišić, P., Beskorovajni, R.,& Popovac, M.. (2013). Phenotype and genetic correlation between milk yield traits in first three consecutive lactations of black and white cows. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 19(3-4), 17-24.
https://hdl.handle.net/21.15107/rcub_agrospace_3366

Stanojević D, Djedović R, Bogdanović V, Perišić P, Beskorovajni R, Popovac M. Phenotype and genetic correlation between milk yield traits in first three consecutive lactations of black and white cows. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2013;19(3-4):17-24.
https://hdl.handle.net/21.15107/rcub_agrospace_3366 .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Perišić, Predrag, Beskorovajni, Radmila, Popovac, Mladen, "Phenotype and genetic correlation between milk yield traits in first three consecutive lactations of black and white cows" in Zbornik naučnih radova Instituta PKB Agroekonomik, 19, no. 3-4 (2013):17-24,
https://hdl.handle.net/21.15107/rcub_agrospace_3366 .

TY  - JOUR
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Trifunović, Gligorije
AU  - Petrović, Milun D.
AU  - Petrović, Milan M.
AU  - Stanojević, Dragan
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2848
AB  - In this study a relationship between the milk yield and following reproduction traits: number of inseminations per conception [AIS], service period [SP], age at calving [AC], calving interval [CI] and birth weight [BW] is studied. The research involved dairy cows of European type of Black and White cattle which are being intensively improved by the genes of Holstein - Friesian breed. Mean values of general average for number of inseminations per conception, service period, age at calving, calving interval and birth weight are: 2.00; 98.78; 1088.08; 376.70 and 36.40, respectively. In general, the estimated phenotypic correlations (rp) between the milk yield over standard lactations and fertility traits were positive and unfavorable, and ranged from 0.24 for the relationship between milk yield and birth weight to 0.70 for relationship between milk yield and age at calving.
AB  - U radu je ispitivan odnos između prinosa mleka i sledećih osobina plodnosti: indeks osemenjavanja [IO], servis period [SP], uzrast pri teljenju [UT], međutelidbeni interval [MI] i masa teladi pri rođenju [MTR]. Ispitivanja su se odnosila na mlečne krave evropskog tipa crno-belih goveda koje se intenzivno oplemenjuju genima holštajn-frizijske rase. Za analizu je korišćen Metod najmanjih kvadrata - LSMLMW (HARVEY, 1990), fiksni model. Srednje vrednosti opšteg proseka za indeks osemenjavanja, servis period, uzrast pri teljenju, međutelidbeni interval i masu teladi pri rođenju su: 2,00; 98,78; 1088,08 ; 376,70 i 36,40, respektivno. Procenjene fenotipske korelacije (rp) između prinosa mleka i osobina plodnosti generalno su bile pozitivne i nepovoljne, i imale su vrednosti od 0,24 za odnos između prinosa mleka i masu teladi pri rođenju do 0,70 za odnos između prinosa mleka i uzrasta pri teljenju.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - The effect of the level of milk yield on the reproduction traits in black and white cows
T1  - Uticaj nivoa mlečnosti na osobine plodnosti krava crno bele rase
EP  - 496
IS  - 3
SP  - 487
VL  - 28
DO  - 10.2298/BAH1203487D
ER  - 

@article{
author = "Djedović, Radica and Bogdanović, Vladan and Trifunović, Gligorije and Petrović, Milun D. and Petrović, Milan M. and Stanojević, Dragan",
year = "2012",
abstract = "In this study a relationship between the milk yield and following reproduction traits: number of inseminations per conception [AIS], service period [SP], age at calving [AC], calving interval [CI] and birth weight [BW] is studied. The research involved dairy cows of European type of Black and White cattle which are being intensively improved by the genes of Holstein - Friesian breed. Mean values of general average for number of inseminations per conception, service period, age at calving, calving interval and birth weight are: 2.00; 98.78; 1088.08; 376.70 and 36.40, respectively. In general, the estimated phenotypic correlations (rp) between the milk yield over standard lactations and fertility traits were positive and unfavorable, and ranged from 0.24 for the relationship between milk yield and birth weight to 0.70 for relationship between milk yield and age at calving., U radu je ispitivan odnos između prinosa mleka i sledećih osobina plodnosti: indeks osemenjavanja [IO], servis period [SP], uzrast pri teljenju [UT], međutelidbeni interval [MI] i masa teladi pri rođenju [MTR]. Ispitivanja su se odnosila na mlečne krave evropskog tipa crno-belih goveda koje se intenzivno oplemenjuju genima holštajn-frizijske rase. Za analizu je korišćen Metod najmanjih kvadrata - LSMLMW (HARVEY, 1990), fiksni model. Srednje vrednosti opšteg proseka za indeks osemenjavanja, servis period, uzrast pri teljenju, međutelidbeni interval i masu teladi pri rođenju su: 2,00; 98,78; 1088,08 ; 376,70 i 36,40, respektivno. Procenjene fenotipske korelacije (rp) između prinosa mleka i osobina plodnosti generalno su bile pozitivne i nepovoljne, i imale su vrednosti od 0,24 za odnos između prinosa mleka i masu teladi pri rođenju do 0,70 za odnos između prinosa mleka i uzrasta pri teljenju.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "The effect of the level of milk yield on the reproduction traits in black and white cows, Uticaj nivoa mlečnosti na osobine plodnosti krava crno bele rase",
pages = "496-487",
number = "3",
volume = "28",
doi = "10.2298/BAH1203487D"
}

Djedović, R., Bogdanović, V., Trifunović, G., Petrović, M. D., Petrović, M. M.,& Stanojević, D.. (2012). The effect of the level of milk yield on the reproduction traits in black and white cows. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 28(3), 487-496.
https://doi.org/10.2298/BAH1203487D

Djedović R, Bogdanović V, Trifunović G, Petrović MD, Petrović MM, Stanojević D. The effect of the level of milk yield on the reproduction traits in black and white cows. in Biotechnology in Animal Husbandry. 2012;28(3):487-496.
doi:10.2298/BAH1203487D .

Djedović, Radica, Bogdanović, Vladan, Trifunović, Gligorije, Petrović, Milun D., Petrović, Milan M., Stanojević, Dragan, "The effect of the level of milk yield on the reproduction traits in black and white cows" in Biotechnology in Animal Husbandry, 28, no. 3 (2012):487-496,
https://doi.org/10.2298/BAH1203487D . .

TY  - JOUR
AU  - Nikšić, Dragan
AU  - Pantelić, Vlada
AU  - Ostojić-Andrić, Dušica
AU  - Perišić, Predrag
AU  - Petričević, M.
AU  - Djedović, Radica
AU  - Lazarević, M.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2844
AB  - Exceptionally important aspect in cattle production, from the aspect of production and economy, is ensuring normal and regular fertility. Every cattle breeder wants to have high-yielding animals which at the same time have good fertility. In proper cattle breeding this means that from each cow during single year one healthy calf is obtained. Use of artificial insemination has enabled that one breeding male is used as sire for several tens of thousands of progeny, however, there is always the risk that sires could be carriers of lethal and semi-lethal genes, which can cause huge losses of calves. In order to bring these undesirable occurrences to a minimum, so called bilogical test is included in the breeding and selection activities, i.e. bulls are tested through their progeny for presence of difficult calving (dystocia) abd calf losses caused by genetic anomalies. In Republic of Serbia, this test is carried out on ehtire Simmental population in an exchange of data produced by primary breeding organizations. Per each tested bull, it is necessary to have data on minimum 50 randomly selected calves. Calves are examined visually 65 days after the birth, at the latest. In the present study, the results of the biological testing of 35 Simmental bulls, sires of total 3572 calves on the territory of Central Serbia, in the period 2008-2009, are used. The effect of sires on parameters of biological test were studied: body mass of calves at birth, calf score and calving score. Also, bulls were ranked based on said parameters, male/female calves ratio and percentage of twins and still-born calves for each bull individually were determined. After the rank of bulls was established, the correlation between the rank and studied fertility traits was determined. Correlations were expressed using the Spearman coefficient. Research results show that the effect of bulls was very high p lt 0,001 on all three parameters of the biological test, and also that the percentage of still born calves for all bulls was within limits, with the exception of bulls Zahlo (HB 1497) and Woz (HB 1433) where it was above 5.
AB  - Izuzetno važan aspekt u govedarskoj proizvodnji, gledano sa proizvodnog i ekonomskog stanovišta je obezbeđivanje normalne i redovne plodnosti. Svaki odgajivač goveda želi da ima grla koja su visoko proizvodna i istovremeno poseduju dobru plodnost. Za pravilno odgajivanje goveda to znači da se od svake krave u toku godine dobije po jedno zdravo tele. Upotreba veštačkog osemenjavanja omogućila je da jedan priplodnjak bude otac nekoliko desetina hiljada potomaka. Međutim, uvek postoji rizik da su očevi nosioci letalnih i semiletalnih gena, što može prouzrokovati velike gubitke teladi. Da bi se ove nepoželjne pojave svele na najmanju moguću meru u odgajivački i selekcijski rad uključeno je ispitivanje bikova po potomstvu na teška teljenja i gubitke teladi izazvane genetskim anomalijama, tzv. biološki test. Ovaj test se u Republici Srbiji vrši jedinstveno za čitavu populaciju simentalske rase, razmenom podataka između odgajivačkih organizacija. Po svakom biku koji se testira, neophodno je imati podatke za najmanje 50 slučajno odabrane teladi. Vizualni pregled teladi se obavlja najkasnije do 65 dana, od datuma rođenja teleta. U ovom istraživanju korišćeni su rezultati biološkog testa 35 bikova simentalske rase koji su bili očevi ukupno 3572 teladi na teritoriji centralne Srbije u periodu 2008. i 2009. godine. U radu je ispitivan uticaj očeva na parametre biološkog testa: telesnu masu teladi po rođenju, ocenu teleta i ocenu toka teljenja. Takođe je izvršeno rangiranje bikova na ove parametre, kao i utvrđivanje odnosa muške i ženske teladi, procenat bližnjenja kao i procenat mrtvorođene teladi za svakog bika posebno. Nakon utvrđenog ranga bikova izvršena je korelacija ranga ispitivanih osobina plodnosti. Korelacije su iskazane Spirmanovim koeficijentom. Rezultati istraživanja pokazali su da je uticaj bikova izuzetno visok p lt 0,001 na sva tri parametra u biološkom testu, kao i da je procenat mrtvorođene teladi kod svih bikova u dozvoljenim granica, osim bikova Zahlo (HB 1497) i Woz (HB 1433) gde je iznosio preko 5.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Results of the biological test of simmental bulls in central Serbia
T1  - Rezultati biološkog testa bikova simentalske rase u centralnoj Srbiji
EP  - 507
IS  - 3
SP  - 497
VL  - 28
DO  - 10.2298/BAH1203497N
ER  - 

@article{
author = "Nikšić, Dragan and Pantelić, Vlada and Ostojić-Andrić, Dušica and Perišić, Predrag and Petričević, M. and Djedović, Radica and Lazarević, M.",
year = "2012",
abstract = "Exceptionally important aspect in cattle production, from the aspect of production and economy, is ensuring normal and regular fertility. Every cattle breeder wants to have high-yielding animals which at the same time have good fertility. In proper cattle breeding this means that from each cow during single year one healthy calf is obtained. Use of artificial insemination has enabled that one breeding male is used as sire for several tens of thousands of progeny, however, there is always the risk that sires could be carriers of lethal and semi-lethal genes, which can cause huge losses of calves. In order to bring these undesirable occurrences to a minimum, so called bilogical test is included in the breeding and selection activities, i.e. bulls are tested through their progeny for presence of difficult calving (dystocia) abd calf losses caused by genetic anomalies. In Republic of Serbia, this test is carried out on ehtire Simmental population in an exchange of data produced by primary breeding organizations. Per each tested bull, it is necessary to have data on minimum 50 randomly selected calves. Calves are examined visually 65 days after the birth, at the latest. In the present study, the results of the biological testing of 35 Simmental bulls, sires of total 3572 calves on the territory of Central Serbia, in the period 2008-2009, are used. The effect of sires on parameters of biological test were studied: body mass of calves at birth, calf score and calving score. Also, bulls were ranked based on said parameters, male/female calves ratio and percentage of twins and still-born calves for each bull individually were determined. After the rank of bulls was established, the correlation between the rank and studied fertility traits was determined. Correlations were expressed using the Spearman coefficient. Research results show that the effect of bulls was very high p lt 0,001 on all three parameters of the biological test, and also that the percentage of still born calves for all bulls was within limits, with the exception of bulls Zahlo (HB 1497) and Woz (HB 1433) where it was above 5., Izuzetno važan aspekt u govedarskoj proizvodnji, gledano sa proizvodnog i ekonomskog stanovišta je obezbeđivanje normalne i redovne plodnosti. Svaki odgajivač goveda želi da ima grla koja su visoko proizvodna i istovremeno poseduju dobru plodnost. Za pravilno odgajivanje goveda to znači da se od svake krave u toku godine dobije po jedno zdravo tele. Upotreba veštačkog osemenjavanja omogućila je da jedan priplodnjak bude otac nekoliko desetina hiljada potomaka. Međutim, uvek postoji rizik da su očevi nosioci letalnih i semiletalnih gena, što može prouzrokovati velike gubitke teladi. Da bi se ove nepoželjne pojave svele na najmanju moguću meru u odgajivački i selekcijski rad uključeno je ispitivanje bikova po potomstvu na teška teljenja i gubitke teladi izazvane genetskim anomalijama, tzv. biološki test. Ovaj test se u Republici Srbiji vrši jedinstveno za čitavu populaciju simentalske rase, razmenom podataka između odgajivačkih organizacija. Po svakom biku koji se testira, neophodno je imati podatke za najmanje 50 slučajno odabrane teladi. Vizualni pregled teladi se obavlja najkasnije do 65 dana, od datuma rođenja teleta. U ovom istraživanju korišćeni su rezultati biološkog testa 35 bikova simentalske rase koji su bili očevi ukupno 3572 teladi na teritoriji centralne Srbije u periodu 2008. i 2009. godine. U radu je ispitivan uticaj očeva na parametre biološkog testa: telesnu masu teladi po rođenju, ocenu teleta i ocenu toka teljenja. Takođe je izvršeno rangiranje bikova na ove parametre, kao i utvrđivanje odnosa muške i ženske teladi, procenat bližnjenja kao i procenat mrtvorođene teladi za svakog bika posebno. Nakon utvrđenog ranga bikova izvršena je korelacija ranga ispitivanih osobina plodnosti. Korelacije su iskazane Spirmanovim koeficijentom. Rezultati istraživanja pokazali su da je uticaj bikova izuzetno visok p lt 0,001 na sva tri parametra u biološkom testu, kao i da je procenat mrtvorođene teladi kod svih bikova u dozvoljenim granica, osim bikova Zahlo (HB 1497) i Woz (HB 1433) gde je iznosio preko 5.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Results of the biological test of simmental bulls in central Serbia, Rezultati biološkog testa bikova simentalske rase u centralnoj Srbiji",
pages = "507-497",
number = "3",
volume = "28",
doi = "10.2298/BAH1203497N"
}

Nikšić, D., Pantelić, V., Ostojić-Andrić, D., Perišić, P., Petričević, M., Djedović, R.,& Lazarević, M.. (2012). Results of the biological test of simmental bulls in central Serbia. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 28(3), 497-507.
https://doi.org/10.2298/BAH1203497N

Nikšić D, Pantelić V, Ostojić-Andrić D, Perišić P, Petričević M, Djedović R, Lazarević M. Results of the biological test of simmental bulls in central Serbia. in Biotechnology in Animal Husbandry. 2012;28(3):497-507.
doi:10.2298/BAH1203497N .

Nikšić, Dragan, Pantelić, Vlada, Ostojić-Andrić, Dušica, Perišić, Predrag, Petričević, M., Djedović, Radica, Lazarević, M., "Results of the biological test of simmental bulls in central Serbia" in Biotechnology in Animal Husbandry, 28, no. 3 (2012):497-507,
https://doi.org/10.2298/BAH1203497N . .

TY  - JOUR
AU  - Bogdanović, Vladan
AU  - Djedović, Radica
AU  - Perišić, Predrag
AU  - Stanojević, Dragan
AU  - Petrović, Milun D.
AU  - Trivunović, Snežana
AU  - Kučević, Denis
AU  - Petrović, Milan M.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2899
AB  - In order to have a more precise description of dairy farm structure and characteristics of dairy production systems, as well as to assess possibilities for improving production and farming conditions in which milk production is organized, a survey based research was directed at a select group of farms across the Serbia. 1180 questionnaires have been mailed to farmers whose farms are registered for either cattle or mixed production. Questionnaire was divided into 6 sections: general information of the farm, agricultural and structural information, zootechnical information, sanitary and veterinarian information, information about education and extension, and information on the perspectives of future farming. About 59% of analyzed farms have size up to 20 ha, with average size of about 10 ha. On the other hand, about 55% farms raises up to 15 cows and heifers with average of 6 heads per farm, while 3% of farms have more than 200 cows and heifers. Over 86% of surveyed farmers intend to expand existing farm production, mainly by increasing the number of animals, stricter selection and improvement of the conditions for feeding, housing, care and milking. About 75% of farmers have expressed a positive expectation from future membership of Serbia in EU, although these expectations are not clearly defined.
AB  - U cilju preciznijeg opisa strukture mlečnih farmi i karakteristika sistema za proizvodnju mleka, kao i procene mogućnosti za unapređenje proizvodnje i farmskih uslova u kojima se proizvodnja mleka organizuje, sprovedena je anketa među poljoprivrednim proizvođačima (farmerima) širom Srbije. Ukupno je poslato 1180 anketa farmerima čije su farme registrovane za govedarsku ili mešovitu proizvodnju. Upitnik koji je poslat farmerima sastojao se iz 6 delova i obuhvatao je opšte informacije o farmi, poljoprivredne i strukturne informacije, zootehničke informacije, sanitarne i veterinarske aspekte proizvodnje, edukaciju i savetodavstvo, kao i perspektive budućeg poslovanja. Oko 59% analiziranih farmi ima veličinu do 20ha, sa prosekom od oko 10ha. Sa druge strane, na oko 55% farmi odgaja se do 15 krava i junica, sa prosekom od 6 grla po farmi. Preko 86% anketiranih farmera namerava da proširi postojeću proizvodnju i to uglavnom povećanjem broja životinja, strožijom selekcijom roditeljskih parova, kao i unapređenjem uslova ishrane, smeštaja i nege. Oko 75% anketiranih farmera izrazilo je pozitivna očekivanja od budućeg članstva Srbije u EU, iako ta očekivanja nisu uvek jasna ili precizno definisana.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - An assessment of dairy farm structure and characteristics of dairy production systems in Serbia
T1  - Procena strukture mlečnih farmi i karakteristika sistema za proizvodnju mleka u Srbiji
EP  - 696
IS  - 4
SP  - 689
VL  - 28
DO  - 10.2298/BAH1204689B
ER  - 

@article{
author = "Bogdanović, Vladan and Djedović, Radica and Perišić, Predrag and Stanojević, Dragan and Petrović, Milun D. and Trivunović, Snežana and Kučević, Denis and Petrović, Milan M.",
year = "2012",
abstract = "In order to have a more precise description of dairy farm structure and characteristics of dairy production systems, as well as to assess possibilities for improving production and farming conditions in which milk production is organized, a survey based research was directed at a select group of farms across the Serbia. 1180 questionnaires have been mailed to farmers whose farms are registered for either cattle or mixed production. Questionnaire was divided into 6 sections: general information of the farm, agricultural and structural information, zootechnical information, sanitary and veterinarian information, information about education and extension, and information on the perspectives of future farming. About 59% of analyzed farms have size up to 20 ha, with average size of about 10 ha. On the other hand, about 55% farms raises up to 15 cows and heifers with average of 6 heads per farm, while 3% of farms have more than 200 cows and heifers. Over 86% of surveyed farmers intend to expand existing farm production, mainly by increasing the number of animals, stricter selection and improvement of the conditions for feeding, housing, care and milking. About 75% of farmers have expressed a positive expectation from future membership of Serbia in EU, although these expectations are not clearly defined., U cilju preciznijeg opisa strukture mlečnih farmi i karakteristika sistema za proizvodnju mleka, kao i procene mogućnosti za unapređenje proizvodnje i farmskih uslova u kojima se proizvodnja mleka organizuje, sprovedena je anketa među poljoprivrednim proizvođačima (farmerima) širom Srbije. Ukupno je poslato 1180 anketa farmerima čije su farme registrovane za govedarsku ili mešovitu proizvodnju. Upitnik koji je poslat farmerima sastojao se iz 6 delova i obuhvatao je opšte informacije o farmi, poljoprivredne i strukturne informacije, zootehničke informacije, sanitarne i veterinarske aspekte proizvodnje, edukaciju i savetodavstvo, kao i perspektive budućeg poslovanja. Oko 59% analiziranih farmi ima veličinu do 20ha, sa prosekom od oko 10ha. Sa druge strane, na oko 55% farmi odgaja se do 15 krava i junica, sa prosekom od 6 grla po farmi. Preko 86% anketiranih farmera namerava da proširi postojeću proizvodnju i to uglavnom povećanjem broja životinja, strožijom selekcijom roditeljskih parova, kao i unapređenjem uslova ishrane, smeštaja i nege. Oko 75% anketiranih farmera izrazilo je pozitivna očekivanja od budućeg članstva Srbije u EU, iako ta očekivanja nisu uvek jasna ili precizno definisana.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "An assessment of dairy farm structure and characteristics of dairy production systems in Serbia, Procena strukture mlečnih farmi i karakteristika sistema za proizvodnju mleka u Srbiji",
pages = "696-689",
number = "4",
volume = "28",
doi = "10.2298/BAH1204689B"
}

Bogdanović, V., Djedović, R., Perišić, P., Stanojević, D., Petrović, M. D., Trivunović, S., Kučević, D.,& Petrović, M. M.. (2012). An assessment of dairy farm structure and characteristics of dairy production systems in Serbia. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 28(4), 689-696.
https://doi.org/10.2298/BAH1204689B

Bogdanović V, Djedović R, Perišić P, Stanojević D, Petrović MD, Trivunović S, Kučević D, Petrović MM. An assessment of dairy farm structure and characteristics of dairy production systems in Serbia. in Biotechnology in Animal Husbandry. 2012;28(4):689-696.
doi:10.2298/BAH1204689B .

Bogdanović, Vladan, Djedović, Radica, Perišić, Predrag, Stanojević, Dragan, Petrović, Milun D., Trivunović, Snežana, Kučević, Denis, Petrović, Milan M., "An assessment of dairy farm structure and characteristics of dairy production systems in Serbia" in Biotechnology in Animal Husbandry, 28, no. 4 (2012):689-696,
https://doi.org/10.2298/BAH1204689B . .

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Popovac, Mladen
AU  - Perišić, Predrag
AU  - Beskorovajni, Radmila
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3074
AB  - Aim of this paper was to assess the values of genetic parameters which have crucial influence on selection effect. Values of phenotype variability as well as coefficient of heritability and correlations between milk yield traits analyzed in this research are shown in this paper. The paper includes 1109 first standard lactations of black and white breed cows, offspring of 9 fathers bred at 7 farms of Agricultural Corporation Belgrade during the year 2008. The paternal influence was researched as well as breeding farm, calving season influence to phenotype expression and variations of milk yield traits in standard lactation. Statistically very significant (p lt 0,01) influence of the bull, farm and calving season on phenotype expressiveness, variability of milk yield, milk fat yield and protein yield in standard lactation was determined. Determined values of heritability for milk yield traits, milk fat contents, protein contents in milk, milk fat yield and milk protein yield were: 0.115, 0.049, 0.017, 0.119. and 0.111, retrospectively. Genetic correlations coefficient values of milk yield traits were from: -0.746 (milk fat yield - protein content) to 0.983 (milk fat yield-protein yield).
AB  - Cilj rada bio je da se procene vrednosti genetskih parametara koji imaju presudan uticaj na efekat selekcije. U radu su prikazane vrednosti fenotipske varijabilnosti kao i koeficijenata naslednosti i povezanosti između osobina mlečnosti analiziranih u ovom istraživanju. U radu je obuhvaćeno 1109 prvih standardnih laktacija, krava crnobele rase, potomaka 9 očeva gajenih na 7 farmi Poljoprivredne korporacije Beograd u toku 2008. godine. U istraživanju je ispitan uticaj oca grla, farme na kojoj je grlo gajeno i sezone teljenja na fenotipsko ispoljavanje i variranje osobina mlečnosti u standardnoj laktaciji. Na fenotipsku ispoljenost i varijabilnost prinosa mleka, prinosa mlečne masti i prinosa proteina u standardnoj laktaciji, visoku statističku značajnost (p lt 0,01) ispoljili su otac grla, farma i sezona teljenja. Utvrđene vrednosti koeficijenata naslednosti za prinos mleka, sadržaj mlečne masti, sadržaj proteina u mleku, prinos mlečne masti, prinos proteina iznosile su: 0.115, 0.049, 0.017, 0.119. i 0.111, retrospektivno. Vrednosti koeficijenata genetskih korelacija osobina mlečnosti iznosile su od: -0.746 (prinos mlečne masti-sadržaj proteina) do 0.983 (prinos mlečne masti-prinos proteina).
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Phenotype and genotype variability and correlations between milk yield traits of black and white cattle breed primiparous cows
T1  - Fenotipska i genotipska varijabilnost i povezanost osobina mlečnosti prvotelki crno-bele rase
EP  - 22
IS  - 3-4
SP  - 15
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3074
ER  - 

@article{
author = "Stanojević, Dragan and Djedović, Radica and Bogdanović, Vladan and Popovac, Mladen and Perišić, Predrag and Beskorovajni, Radmila",
year = "2012",
abstract = "Aim of this paper was to assess the values of genetic parameters which have crucial influence on selection effect. Values of phenotype variability as well as coefficient of heritability and correlations between milk yield traits analyzed in this research are shown in this paper. The paper includes 1109 first standard lactations of black and white breed cows, offspring of 9 fathers bred at 7 farms of Agricultural Corporation Belgrade during the year 2008. The paternal influence was researched as well as breeding farm, calving season influence to phenotype expression and variations of milk yield traits in standard lactation. Statistically very significant (p lt 0,01) influence of the bull, farm and calving season on phenotype expressiveness, variability of milk yield, milk fat yield and protein yield in standard lactation was determined. Determined values of heritability for milk yield traits, milk fat contents, protein contents in milk, milk fat yield and milk protein yield were: 0.115, 0.049, 0.017, 0.119. and 0.111, retrospectively. Genetic correlations coefficient values of milk yield traits were from: -0.746 (milk fat yield - protein content) to 0.983 (milk fat yield-protein yield)., Cilj rada bio je da se procene vrednosti genetskih parametara koji imaju presudan uticaj na efekat selekcije. U radu su prikazane vrednosti fenotipske varijabilnosti kao i koeficijenata naslednosti i povezanosti između osobina mlečnosti analiziranih u ovom istraživanju. U radu je obuhvaćeno 1109 prvih standardnih laktacija, krava crnobele rase, potomaka 9 očeva gajenih na 7 farmi Poljoprivredne korporacije Beograd u toku 2008. godine. U istraživanju je ispitan uticaj oca grla, farme na kojoj je grlo gajeno i sezone teljenja na fenotipsko ispoljavanje i variranje osobina mlečnosti u standardnoj laktaciji. Na fenotipsku ispoljenost i varijabilnost prinosa mleka, prinosa mlečne masti i prinosa proteina u standardnoj laktaciji, visoku statističku značajnost (p lt 0,01) ispoljili su otac grla, farma i sezona teljenja. Utvrđene vrednosti koeficijenata naslednosti za prinos mleka, sadržaj mlečne masti, sadržaj proteina u mleku, prinos mlečne masti, prinos proteina iznosile su: 0.115, 0.049, 0.017, 0.119. i 0.111, retrospektivno. Vrednosti koeficijenata genetskih korelacija osobina mlečnosti iznosile su od: -0.746 (prinos mlečne masti-sadržaj proteina) do 0.983 (prinos mlečne masti-prinos proteina).",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Phenotype and genotype variability and correlations between milk yield traits of black and white cattle breed primiparous cows, Fenotipska i genotipska varijabilnost i povezanost osobina mlečnosti prvotelki crno-bele rase",
pages = "22-15",
number = "3-4",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3074"
}

Stanojević, D., Djedović, R., Bogdanović, V., Popovac, M., Perišić, P.,& Beskorovajni, R.. (2012). Phenotype and genotype variability and correlations between milk yield traits of black and white cattle breed primiparous cows. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 18(3-4), 15-22.
https://hdl.handle.net/21.15107/rcub_agrospace_3074

Stanojević D, Djedović R, Bogdanović V, Popovac M, Perišić P, Beskorovajni R. Phenotype and genotype variability and correlations between milk yield traits of black and white cattle breed primiparous cows. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2012;18(3-4):15-22.
https://hdl.handle.net/21.15107/rcub_agrospace_3074 .

Stanojević, Dragan, Djedović, Radica, Bogdanović, Vladan, Popovac, Mladen, Perišić, Predrag, Beskorovajni, Radmila, "Phenotype and genotype variability and correlations between milk yield traits of black and white cattle breed primiparous cows" in Zbornik naučnih radova Instituta PKB Agroekonomik, 18, no. 3-4 (2012):15-22,
https://hdl.handle.net/21.15107/rcub_agrospace_3074 .

TY  - JOUR
AU  - Bogdanović, Vladan
AU  - Djedović, Radica
AU  - Perišić, Predrag
AU  - Stanojević, Dragan
AU  - Beskorovajni, Radmila
AU  - Petrović, Milun D.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3075
AB  - It is of economic interest for breeders that dairy cattle should be long enough in production, without compromising their health or reproductive performance. In modern dairy cattle breeding programs, in addition to traits of which dairy production directly depends on, emphasis is also placed on those traits that contribute to improving production efficiency, primarily by reducing production cost. These traits are known as functional traits, among which is longevity of cows one of the most important. Longevity indicates the time period during which the cow remains in the herd before being culled. The aim of this paper is to present the most important characteristics of longevity of cows as a very important functional traits of dairy cattle.
AB  - Da bi jedno grlo u proizvodnji mleka bilo od ekonomskog interesa za odgajivača ono mora dovoljno dugo da bude u proizvodnji bez narušavanja zdravstvenih ili reproduktivnih sposobnosti. U modernim odgajivačkim programima, pored osobina od kojih direktno zavisi proizvodnja mleka, akcenat se stavlja i na one osobine koje doprinose unapređenju efikasnosti proizvodnje, pre svega, smanjivanjem troškova. U te osobine ubrajaju se i funkcionalne osobine, među kojima je jedna od najznačajnijih dugovečnost krava koja ukazuje na vremenski period tokom koga grlo ostaje u zapatu pre nego što se izluči. Cilj ovog rada je da se prikažu najznačajnije karakteristike dugovečnosti kao izuzetno važne funkcionalne osobine krava.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Longevity as functional traits of dairy cows
T1  - Karakteristike dugovečnosti kao funkcionalne osobine mlečnih krava
EP  - 33
IS  - 3-4
SP  - 23
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3075
ER  - 

@article{
author = "Bogdanović, Vladan and Djedović, Radica and Perišić, Predrag and Stanojević, Dragan and Beskorovajni, Radmila and Petrović, Milun D.",
year = "2012",
abstract = "It is of economic interest for breeders that dairy cattle should be long enough in production, without compromising their health or reproductive performance. In modern dairy cattle breeding programs, in addition to traits of which dairy production directly depends on, emphasis is also placed on those traits that contribute to improving production efficiency, primarily by reducing production cost. These traits are known as functional traits, among which is longevity of cows one of the most important. Longevity indicates the time period during which the cow remains in the herd before being culled. The aim of this paper is to present the most important characteristics of longevity of cows as a very important functional traits of dairy cattle., Da bi jedno grlo u proizvodnji mleka bilo od ekonomskog interesa za odgajivača ono mora dovoljno dugo da bude u proizvodnji bez narušavanja zdravstvenih ili reproduktivnih sposobnosti. U modernim odgajivačkim programima, pored osobina od kojih direktno zavisi proizvodnja mleka, akcenat se stavlja i na one osobine koje doprinose unapređenju efikasnosti proizvodnje, pre svega, smanjivanjem troškova. U te osobine ubrajaju se i funkcionalne osobine, među kojima je jedna od najznačajnijih dugovečnost krava koja ukazuje na vremenski period tokom koga grlo ostaje u zapatu pre nego što se izluči. Cilj ovog rada je da se prikažu najznačajnije karakteristike dugovečnosti kao izuzetno važne funkcionalne osobine krava.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Longevity as functional traits of dairy cows, Karakteristike dugovečnosti kao funkcionalne osobine mlečnih krava",
pages = "33-23",
number = "3-4",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3075"
}

Bogdanović, V., Djedović, R., Perišić, P., Stanojević, D., Beskorovajni, R.,& Petrović, M. D.. (2012). Longevity as functional traits of dairy cows. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 18(3-4), 23-33.
https://hdl.handle.net/21.15107/rcub_agrospace_3075

Bogdanović V, Djedović R, Perišić P, Stanojević D, Beskorovajni R, Petrović MD. Longevity as functional traits of dairy cows. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2012;18(3-4):23-33.
https://hdl.handle.net/21.15107/rcub_agrospace_3075 .

Bogdanović, Vladan, Djedović, Radica, Perišić, Predrag, Stanojević, Dragan, Beskorovajni, Radmila, Petrović, Milun D., "Longevity as functional traits of dairy cows" in Zbornik naučnih radova Instituta PKB Agroekonomik, 18, no. 3-4 (2012):23-33,
https://hdl.handle.net/21.15107/rcub_agrospace_3075 .