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  - Mićić, Nenad
AU  - Stanojević, Dragan
AU  - Samolovac, Ljiljana
AU  - Petričević, Veselin
AU  - Stojiljković, Nenad
AU  - Gantner, Vesna
AU  - Bogdanović, Vladan
PY  - 2022
UR  - https://hrcak.srce.hr/284183
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6204
AB  - The study aimed to determine the effect of different fixed factors (breed, region, calving year,
calving season, parity and lactation stage) on daily milk production (yield and content) of four
dairy cattle breeds under the heat stress conditions (THI≥72). The research was conducted
on a set of test-day records of four dairy cattle breeds (Simmental, Holstein-Friesian, Red
Holstein and Brown Swiss) reared in the Republic of Serbia (Region of Mačva, Podunavlje and
Šumadija). The statistical analysis included test-day records collected in the period from the
beginning of the year 2012 to the end of the year 2019. Based on the performed analysis, it
could be demonstrated that all the effects included in the statistical model (breed, region,
calving year, calving season, parity and lactation stage) statistically highly significant (p<0.001)
affected daily milk production (yield and content) of cows reared in the terms of the heat stress
conditions. The highest daily milk production was determined in the region of Podunavlje, and
by the Holstein-Friesian breed. Furthermore, dairy cows calved during the spring season, in the
third lactation and from the 61st to the 120th day of lactation, had the highest milk production
during the summer period in an environment characterised by heat stress. Also, daily milk yield
of cows in a heat stress environment decreased in the period from June to September. The
results obtained indicate different animals’ responses to heat stress concerning the animal’s
breed, rearing region, calving year, calving season, parity and lactation stage.
T2  - Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka
T2  - Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka
T1  - The effect of animal-related and some environmental effects on daily milk production of dairy cows under the heat stress conditions
EP  - 260
IS  - 4
SP  - 250
VL  - 72
DO  - 10.15567/mljekarstvo.2022.0406
ER  - 

@article{
author = "Mićić, Nenad and Stanojević, Dragan and Samolovac, Ljiljana and Petričević, Veselin and Stojiljković, Nenad and Gantner, Vesna and Bogdanović, Vladan",
year = "2022",
abstract = "The study aimed to determine the effect of different fixed factors (breed, region, calving year,
calving season, parity and lactation stage) on daily milk production (yield and content) of four
dairy cattle breeds under the heat stress conditions (THI≥72). The research was conducted
on a set of test-day records of four dairy cattle breeds (Simmental, Holstein-Friesian, Red
Holstein and Brown Swiss) reared in the Republic of Serbia (Region of Mačva, Podunavlje and
Šumadija). The statistical analysis included test-day records collected in the period from the
beginning of the year 2012 to the end of the year 2019. Based on the performed analysis, it
could be demonstrated that all the effects included in the statistical model (breed, region,
calving year, calving season, parity and lactation stage) statistically highly significant (p<0.001)
affected daily milk production (yield and content) of cows reared in the terms of the heat stress
conditions. The highest daily milk production was determined in the region of Podunavlje, and
by the Holstein-Friesian breed. Furthermore, dairy cows calved during the spring season, in the
third lactation and from the 61st to the 120th day of lactation, had the highest milk production
during the summer period in an environment characterised by heat stress. Also, daily milk yield
of cows in a heat stress environment decreased in the period from June to September. The
results obtained indicate different animals’ responses to heat stress concerning the animal’s
breed, rearing region, calving year, calving season, parity and lactation stage.",
journal = "Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka, Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka",
title = "The effect of animal-related and some environmental effects on daily milk production of dairy cows under the heat stress conditions",
pages = "260-250",
number = "4",
volume = "72",
doi = "10.15567/mljekarstvo.2022.0406"
}

Mićić, N., Stanojević, D., Samolovac, L., Petričević, V., Stojiljković, N., Gantner, V.,& Bogdanović, V.. (2022). The effect of animal-related and some environmental effects on daily milk production of dairy cows under the heat stress conditions. in Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka, 72(4), 250-260.
https://doi.org/10.15567/mljekarstvo.2022.0406

Mićić N, Stanojević D, Samolovac L, Petričević V, Stojiljković N, Gantner V, Bogdanović V. The effect of animal-related and some environmental effects on daily milk production of dairy cows under the heat stress conditions. in Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka. 2022;72(4):250-260.
doi:10.15567/mljekarstvo.2022.0406 .

Mićić, Nenad, Stanojević, Dragan, Samolovac, Ljiljana, Petričević, Veselin, Stojiljković, Nenad, Gantner, Vesna, Bogdanović, Vladan, "The effect of animal-related and some environmental effects on daily milk production of dairy cows under the heat stress conditions" in Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka, 72, no. 4 (2022):250-260,
https://doi.org/10.15567/mljekarstvo.2022.0406 . .

TY  - JOUR
AU  - Nikšić, Dragan
AU  - Pantelić, Vlada
AU  - Ostojić Andrić, Dušica
AU  - Stanojević, Dragan
AU  - Delić, Nikola
AU  - Stanojković, Aleksandar
AU  - Petričević, Maja
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5863
AB  - Nikšić D., V. Pantelić, D. Ostojić Andrić D. Stanojević, N. Delić, A. Stanojković, M. Petričević (2021). The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the Simmental breed in Serbia.-Genetika, Vol 53, No.1, 263-270. The study of the link between genes controlling protein polymorphism and milk performance traits of domestic animals has great economic importance from a selection point of view, as it reduces the generation interval, leading to increased productivity in livestock. The objective of this paper was to establish the influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in Serbiа. For the research blood samples were taken from a total of 157 Simmental cows. The genotypes of Simmental cows for β-lactoblobulin and their effect on quantitative milk performance traits were determined using the PCR-RFLP analysis. The variability of traits influenced by the genetic polymorphism of β-lactoblobulin was statistically very highly significant (p <0.0001) for milk yield in standard lactation and milk fat and protein yields, while it showed no statistically significant variability (p> 0.05) for content of milk fat and protein. The AB genotype cows achieved a 121 kg and 338 kg increase in milk production compared to the BB genotype and AA genotype cows, respectively.
PB  - Serbian Genetics Society
T2  - Genetika
T1  - [The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in serbia] [Uticaj genetičkog polimorfizma β-laktoglobulina na količinu i kvalitet mleka]
EP  - 270
IS  - 1
SP  - 263
VL  - 53
DO  - 10.2298/GENSR2101263N
ER  - 

@article{
author = "Nikšić, Dragan and Pantelić, Vlada and Ostojić Andrić, Dušica and Stanojević, Dragan and Delić, Nikola and Stanojković, Aleksandar and Petričević, Maja",
year = "2021",
abstract = "Nikšić D., V. Pantelić, D. Ostojić Andrić D. Stanojević, N. Delić, A. Stanojković, M. Petričević (2021). The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the Simmental breed in Serbia.-Genetika, Vol 53, No.1, 263-270. The study of the link between genes controlling protein polymorphism and milk performance traits of domestic animals has great economic importance from a selection point of view, as it reduces the generation interval, leading to increased productivity in livestock. The objective of this paper was to establish the influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in Serbiа. For the research blood samples were taken from a total of 157 Simmental cows. The genotypes of Simmental cows for β-lactoblobulin and their effect on quantitative milk performance traits were determined using the PCR-RFLP analysis. The variability of traits influenced by the genetic polymorphism of β-lactoblobulin was statistically very highly significant (p <0.0001) for milk yield in standard lactation and milk fat and protein yields, while it showed no statistically significant variability (p> 0.05) for content of milk fat and protein. The AB genotype cows achieved a 121 kg and 338 kg increase in milk production compared to the BB genotype and AA genotype cows, respectively.",
publisher = "Serbian Genetics Society",
journal = "Genetika",
title = "[The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in serbia] [Uticaj genetičkog polimorfizma β-laktoglobulina na količinu i kvalitet mleka]",
pages = "270-263",
number = "1",
volume = "53",
doi = "10.2298/GENSR2101263N"
}

Nikšić, D., Pantelić, V., Ostojić Andrić, D., Stanojević, D., Delić, N., Stanojković, A.,& Petričević, M.. (2021). [The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in serbia] [Uticaj genetičkog polimorfizma β-laktoglobulina na količinu i kvalitet mleka]. in Genetika
Serbian Genetics Society., 53(1), 263-270.
https://doi.org/10.2298/GENSR2101263N

Nikšić D, Pantelić V, Ostojić Andrić D, Stanojević D, Delić N, Stanojković A, Petričević M. [The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in serbia] [Uticaj genetičkog polimorfizma β-laktoglobulina na količinu i kvalitet mleka]. in Genetika. 2021;53(1):263-270.
doi:10.2298/GENSR2101263N .

Nikšić, Dragan, Pantelić, Vlada, Ostojić Andrić, Dušica, Stanojević, Dragan, Delić, Nikola, Stanojković, Aleksandar, Petričević, Maja, "[The influence of genetic β-lactoglobulin polymorphism on the quantity and quality of milk of the simmental breed in serbia] [Uticaj genetičkog polimorfizma β-laktoglobulina na količinu i kvalitet mleka]" in Genetika, 53, no. 1 (2021):263-270,
https://doi.org/10.2298/GENSR2101263N . .

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  - Popovac, Mladen
AU  - Miletić, Aleksandar
AU  - Raguz, Nikola
AU  - Beskorovajni, Radmila
AU  - Stanojević, Dragan
AU  - Radivojević, Mihailo
AU  - Micić, Nenad
AU  - Durić, Nenad
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5269
AB  - The objective of this paper was to study variability, heritability and correlation of the three production traits in 1409 first-calf heifers of Holstein-Friesian breed; including the determination of the quantity of milk during lactation (ML), the quantity of milk fat during lactation (MM) and the quantity of protein during lactation (PR). According to the obtained results it could be concluded that there were statistically significant differences (P lt 0.01, P lt 0.05, P lt 0.001) between ML, MM and PR regarding the effect of season of the first calving and the length of the first lactation. In addition, there were also significant differences (P lt 0.01, P lt 0.001) between ML and PR with respect to the effect of farm on which animals were raised, while on MM variability the year and age at first calving had a significant effect (P lt 0.05). A share of Holstein genes and the ration which animals were fed had no effect (P>0.05) on variability of any of the examined traits, while the farm on which animals were raised had no effect (P>0.05) on MM, and year and age at first calving did not demonstrate (P>0.05) statistically significant effect on ML and PR. By applying the animal model, based on the use of kinship matrix which involved 3867 animals, by help of REML methodology following heritability coefficients were evaluated: ML h(2) = 0.25; MM h(2) = 0.40; PR h(2) = 037. Coefficients determined for genetic and phenotypic correlations indicated existence of complete and positive correlations between these traits the interval of values being from r(g )= 0.96 between ML and MM to r(g) = 1.00 between ML and PR.
PB  - Croatian Dairy Union, Zagreb
T2  - Mljekarstvo
T1  - Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
EP  - 102
IS  - 2
SP  - 93
VL  - 70
DO  - 10.15567/mljekarstvo.2020.0203
ER  - 

@article{
author = "Popovac, Mladen and Miletić, Aleksandar and Raguz, Nikola and Beskorovajni, Radmila and Stanojević, Dragan and Radivojević, Mihailo and Micić, Nenad and Durić, Nenad",
year = "2020",
abstract = "The objective of this paper was to study variability, heritability and correlation of the three production traits in 1409 first-calf heifers of Holstein-Friesian breed; including the determination of the quantity of milk during lactation (ML), the quantity of milk fat during lactation (MM) and the quantity of protein during lactation (PR). According to the obtained results it could be concluded that there were statistically significant differences (P lt 0.01, P lt 0.05, P lt 0.001) between ML, MM and PR regarding the effect of season of the first calving and the length of the first lactation. In addition, there were also significant differences (P lt 0.01, P lt 0.001) between ML and PR with respect to the effect of farm on which animals were raised, while on MM variability the year and age at first calving had a significant effect (P lt 0.05). A share of Holstein genes and the ration which animals were fed had no effect (P>0.05) on variability of any of the examined traits, while the farm on which animals were raised had no effect (P>0.05) on MM, and year and age at first calving did not demonstrate (P>0.05) statistically significant effect on ML and PR. By applying the animal model, based on the use of kinship matrix which involved 3867 animals, by help of REML methodology following heritability coefficients were evaluated: ML h(2) = 0.25; MM h(2) = 0.40; PR h(2) = 037. Coefficients determined for genetic and phenotypic correlations indicated existence of complete and positive correlations between these traits the interval of values being from r(g )= 0.96 between ML and MM to r(g) = 1.00 between ML and PR.",
publisher = "Croatian Dairy Union, Zagreb",
journal = "Mljekarstvo",
title = "Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed",
pages = "102-93",
number = "2",
volume = "70",
doi = "10.15567/mljekarstvo.2020.0203"
}

Popovac, M., Miletić, A., Raguz, N., Beskorovajni, R., Stanojević, D., Radivojević, M., Micić, N.,& Durić, N.. (2020). Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed. in Mljekarstvo
Croatian Dairy Union, Zagreb., 70(2), 93-102.
https://doi.org/10.15567/mljekarstvo.2020.0203

Popovac M, Miletić A, Raguz N, Beskorovajni R, Stanojević D, Radivojević M, Micić N, Durić N. Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed. in Mljekarstvo. 2020;70(2):93-102.
doi:10.15567/mljekarstvo.2020.0203 .

Popovac, Mladen, Miletić, Aleksandar, Raguz, Nikola, Beskorovajni, Radmila, Stanojević, Dragan, Radivojević, Mihailo, Micić, Nenad, Durić, Nenad, "Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed" in Mljekarstvo, 70, no. 2 (2020):93-102,
https://doi.org/10.15567/mljekarstvo.2020.0203 . .

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  - Zeljić, Krstina
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Mekić, Cvijan
AU  - Ružić-Muslić, Dragana
AU  - Maksimović, Nevena
AU  - Stojiljković, Nenad
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5194
AB  - The objective of this research paper was to estimate heritability coefficients (heritability) of growth traits in the lambs of indigenous Sjenicka Pramenka breed. The research was conducted on a sample which included 421 lambs the descendants of 15 sires and 187 sheep-dams, raised on 3 private farms in Kolubarski district, Serbia. The effect of fixed factors was studied while the values of heritability coefficients were estimated within the frame of SAS software package. A statistically highly significant (**=P lt 0.01) effect on studied traits had following parameters: sex, year of lambing, type of lambing, farm and method of applied reproductive technology. By means of REML method and using the sire model the values of heritability coefficients were determined for the following traits: average lamb birth weight (BW0), average lamb body weight at 30 days (BW30) and average lamb body weight at 90 days (BW90) being: 0.0355; 0.4642 and 0.3018, respectively.
AB  - Cilj rada bio je da se procene koeficijenti naslednosti (heritabilitet) osobina porasta kod jagnjadi sjeničke pramenke. Istraživanje je sprovedeno na uzorku od 421 jagnjadi, potomaka 15 očeva i 187 ovaca-majki sa 3 privatne farme u Kolubarskom okrugu. Ispitan je uticaj fiksnih faktora i procenjene su vrednosti koeficijenata naslednosti u okviru SAS softverskog paketa. Visoko statistički značajan (**=P lt 0,01) uticaj na ispitivane osobine imali su: pol, godina jagnjenja, tip jagnjenja, farma i metod primenjene reproduktivne tehnologije. Metodom intraklasne korelacije polusrodnika po ocu utvrđene su vrednosti koeficijenta naslednosti za osobine: prosečna telesna masa jagnjadi na rođenju (BW0), prosečna telesna masa jagnjadi sa 30 dana starosti (BW30) i prosečna telesna masa jagnjadi sa 90 dana starosti (BW90) i iznosile su: 0,0355; 0,4642 i 0,3018, respektivno.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Estimation of growth traits heritability coefficients in sheep
T1  - Procena koeficijenta naslednosti za osobine porasta kod ovaca
EP  - 355
IS  - 4
SP  - 347
VL  - 35
DO  - 10.2298/BAH1904347Z
ER  - 

@article{
author = "Zeljić, Krstina and Stanojević, Dragan and Bogdanović, Vladan and Mekić, Cvijan and Ružić-Muslić, Dragana and Maksimović, Nevena and Stojiljković, Nenad",
year = "2019",
abstract = "The objective of this research paper was to estimate heritability coefficients (heritability) of growth traits in the lambs of indigenous Sjenicka Pramenka breed. The research was conducted on a sample which included 421 lambs the descendants of 15 sires and 187 sheep-dams, raised on 3 private farms in Kolubarski district, Serbia. The effect of fixed factors was studied while the values of heritability coefficients were estimated within the frame of SAS software package. A statistically highly significant (**=P lt 0.01) effect on studied traits had following parameters: sex, year of lambing, type of lambing, farm and method of applied reproductive technology. By means of REML method and using the sire model the values of heritability coefficients were determined for the following traits: average lamb birth weight (BW0), average lamb body weight at 30 days (BW30) and average lamb body weight at 90 days (BW90) being: 0.0355; 0.4642 and 0.3018, respectively., Cilj rada bio je da se procene koeficijenti naslednosti (heritabilitet) osobina porasta kod jagnjadi sjeničke pramenke. Istraživanje je sprovedeno na uzorku od 421 jagnjadi, potomaka 15 očeva i 187 ovaca-majki sa 3 privatne farme u Kolubarskom okrugu. Ispitan je uticaj fiksnih faktora i procenjene su vrednosti koeficijenata naslednosti u okviru SAS softverskog paketa. Visoko statistički značajan (**=P lt 0,01) uticaj na ispitivane osobine imali su: pol, godina jagnjenja, tip jagnjenja, farma i metod primenjene reproduktivne tehnologije. Metodom intraklasne korelacije polusrodnika po ocu utvrđene su vrednosti koeficijenta naslednosti za osobine: prosečna telesna masa jagnjadi na rođenju (BW0), prosečna telesna masa jagnjadi sa 30 dana starosti (BW30) i prosečna telesna masa jagnjadi sa 90 dana starosti (BW90) i iznosile su: 0,0355; 0,4642 i 0,3018, respektivno.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Estimation of growth traits heritability coefficients in sheep, Procena koeficijenta naslednosti za osobine porasta kod ovaca",
pages = "355-347",
number = "4",
volume = "35",
doi = "10.2298/BAH1904347Z"
}

Zeljić, K., Stanojević, D., Bogdanović, V., Mekić, C., Ružić-Muslić, D., Maksimović, N.,& Stojiljković, N.. (2019). Estimation of growth traits heritability coefficients in sheep. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 35(4), 347-355.
https://doi.org/10.2298/BAH1904347Z

Zeljić K, Stanojević D, Bogdanović V, Mekić C, Ružić-Muslić D, Maksimović N, Stojiljković N. Estimation of growth traits heritability coefficients in sheep. in Biotechnology in Animal Husbandry. 2019;35(4):347-355.
doi:10.2298/BAH1904347Z .

Zeljić, Krstina, Stanojević, Dragan, Bogdanović, Vladan, Mekić, Cvijan, Ružić-Muslić, Dragana, Maksimović, Nevena, Stojiljković, Nenad, "Estimation of growth traits heritability coefficients in sheep" in Biotechnology in Animal Husbandry, 35, no. 4 (2019):347-355,
https://doi.org/10.2298/BAH1904347Z . .

TY  - JOUR
AU  - Kučević, Denis
AU  - Papović, Tamara
AU  - Tomović, Vladimir
AU  - Plavsić, Miroslav
AU  - Jajić, Igor
AU  - Krstović, Sasa
AU  - Stanojević, Dragan
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4969
AB  - Simple Summary: Cattle have been selected for their adaptation to a specific environment and productive system, in which they show, in theory, their best economical results. With appropriate nutrition, the calf's performance enhances during early life and improve the production limit providing distinctive opportunities to optimize feeding strategies and increase the profitability of beef production. There is considerable variation in fattening protocols as well as in farm conditions. Meat quality parameters and carcass traits are the main objectives of most research carried out in the beef production area. Optimizing meat quality parameters and carcass traits are important for farmer profits and consumer satisfaction. According to that, at the phenotypic level, growth performance and traits could be observed. Rearing practices are known to have an impact on cattle carcasses and meat characteristics. The rearing practices applied after calving have an influence on the animal's performance at the growth period and can involve different animal properties at the beginning of the fattening period. Abstract: This study assessed the effects of farm management during rearing practices in the first months of a calf's life on growth performance and meat quality traits during the fattening period. A total of 48 Simmental calves were divided into two groups at a commercial cattle feedlot. In the first group were calves from the same farm and herd (n = 12 male and n = 12 female). The second group included calves from several different herds and farms (n = 12 male and n= 12 female). Calves were transferred to a feedlot and fed with a commercial feedlot ration at three to four months of age. The aim was to determine if identical fattening conditions at feedlot can reduce initial calf rearing differences between cattle during the fattening period. Bulls grew faster than heifers reaching higher total gain and showed significantly higher slaughter weight than heifers. Meat samples of heifers from the same herd had the highest intramuscular fat content and reddest color with significant differences among cattle groups. The most abundant fatty acid was oleic acid (C18:1), followed by palmitic (C16:0), stearic (C18:0), linoleic (C18:2), and myristic acid (C14:0). Meat samples of heifers from different herds were darkest with highest content of iron (Fe) with significant differences among cattle groups.
PB  - MDPI, BASEL
T2  - Animals
T1  - Influence of Farm Management for Calves on Growth Performance and Meat Quality Traits Duration Fattening of Simmental Bulls and Heifers
IS  - 11
VL  - 9
DO  - 10.3390/ani9110941
ER  - 

@article{
author = "Kučević, Denis and Papović, Tamara and Tomović, Vladimir and Plavsić, Miroslav and Jajić, Igor and Krstović, Sasa and Stanojević, Dragan",
year = "2019",
abstract = "Simple Summary: Cattle have been selected for their adaptation to a specific environment and productive system, in which they show, in theory, their best economical results. With appropriate nutrition, the calf's performance enhances during early life and improve the production limit providing distinctive opportunities to optimize feeding strategies and increase the profitability of beef production. There is considerable variation in fattening protocols as well as in farm conditions. Meat quality parameters and carcass traits are the main objectives of most research carried out in the beef production area. Optimizing meat quality parameters and carcass traits are important for farmer profits and consumer satisfaction. According to that, at the phenotypic level, growth performance and traits could be observed. Rearing practices are known to have an impact on cattle carcasses and meat characteristics. The rearing practices applied after calving have an influence on the animal's performance at the growth period and can involve different animal properties at the beginning of the fattening period. Abstract: This study assessed the effects of farm management during rearing practices in the first months of a calf's life on growth performance and meat quality traits during the fattening period. A total of 48 Simmental calves were divided into two groups at a commercial cattle feedlot. In the first group were calves from the same farm and herd (n = 12 male and n = 12 female). The second group included calves from several different herds and farms (n = 12 male and n= 12 female). Calves were transferred to a feedlot and fed with a commercial feedlot ration at three to four months of age. The aim was to determine if identical fattening conditions at feedlot can reduce initial calf rearing differences between cattle during the fattening period. Bulls grew faster than heifers reaching higher total gain and showed significantly higher slaughter weight than heifers. Meat samples of heifers from the same herd had the highest intramuscular fat content and reddest color with significant differences among cattle groups. The most abundant fatty acid was oleic acid (C18:1), followed by palmitic (C16:0), stearic (C18:0), linoleic (C18:2), and myristic acid (C14:0). Meat samples of heifers from different herds were darkest with highest content of iron (Fe) with significant differences among cattle groups.",
publisher = "MDPI, BASEL",
journal = "Animals",
title = "Influence of Farm Management for Calves on Growth Performance and Meat Quality Traits Duration Fattening of Simmental Bulls and Heifers",
number = "11",
volume = "9",
doi = "10.3390/ani9110941"
}

Kučević, D., Papović, T., Tomović, V., Plavsić, M., Jajić, I., Krstović, S.,& Stanojević, D.. (2019). Influence of Farm Management for Calves on Growth Performance and Meat Quality Traits Duration Fattening of Simmental Bulls and Heifers. in Animals
MDPI, BASEL., 9(11).
https://doi.org/10.3390/ani9110941

Kučević D, Papović T, Tomović V, Plavsić M, Jajić I, Krstović S, Stanojević D. Influence of Farm Management for Calves on Growth Performance and Meat Quality Traits Duration Fattening of Simmental Bulls and Heifers. in Animals. 2019;9(11).
doi:10.3390/ani9110941 .

Kučević, Denis, Papović, Tamara, Tomović, Vladimir, Plavsić, Miroslav, Jajić, Igor, Krstović, Sasa, Stanojević, Dragan, "Influence of Farm Management for Calves on Growth Performance and Meat Quality Traits Duration Fattening of Simmental Bulls and Heifers" in Animals, 9, no. 11 (2019),
https://doi.org/10.3390/ani9110941 . .

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  - Lazarević, Marina
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Pantelić, Vlada
AU  - Maksimović, Nevena
AU  - Marinković, Milos
AU  - Micić, Nenad
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4769
AB  - The research was performed on Holstein-Friesian and Black and White bull dams reared on five farms of Agricultural Corporation of Belgrade - PKB. The study included 575 lactations of cows selected as bull dams and their progeny calved in the period from 2007 - 2014 and represent progeny of 24 bulls. The following dairy traits were analysed in a standard lactation (305 days): milk yield (kg) - MY, milk fat content (%) - % MF, milk fat yield (kg) - MFY, protein content (%) - % PC and protein yield (kg) - PY. Holstein-Friesian bull dams and their progeny, in standard lactation, produced on average 9239.84 +/- 1607.64 kg of milk, with a milk fat content of 3.44 +/- 0.20 and protein content of 3.21 +/- 0.12. The impact of bull - sire, year of birth, lactation order, farm, year and calving season was present at different levels of statistical significance on yield traits, while the genetic group had no influence on any of the milk traits. Bull sire, year of birth, lactation order and calving season did not influence the variability of milk fat and protein content. Heritability of observed milk traits was medium to low. The content of milk fat and protein had the lowest values of heritability, 0.014, and 0.024, respectively. The heritability of milk yield, milk fat yield and protein yield was 0.293, 0.319 and 0.273, respectively.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - Variability and heritability of milk traits of holstein - frisian bull dams and their progeny
EP  - 251
IS  - 1
SP  - 243
VL  - 50
DO  - 10.2298/GENSR1801243L
ER  - 

@article{
author = "Lazarević, Marina and Stanojević, Dragan and Bogdanović, Vladan and Pantelić, Vlada and Maksimović, Nevena and Marinković, Milos and Micić, Nenad",
year = "2018",
abstract = "The research was performed on Holstein-Friesian and Black and White bull dams reared on five farms of Agricultural Corporation of Belgrade - PKB. The study included 575 lactations of cows selected as bull dams and their progeny calved in the period from 2007 - 2014 and represent progeny of 24 bulls. The following dairy traits were analysed in a standard lactation (305 days): milk yield (kg) - MY, milk fat content (%) - % MF, milk fat yield (kg) - MFY, protein content (%) - % PC and protein yield (kg) - PY. Holstein-Friesian bull dams and their progeny, in standard lactation, produced on average 9239.84 +/- 1607.64 kg of milk, with a milk fat content of 3.44 +/- 0.20 and protein content of 3.21 +/- 0.12. The impact of bull - sire, year of birth, lactation order, farm, year and calving season was present at different levels of statistical significance on yield traits, while the genetic group had no influence on any of the milk traits. Bull sire, year of birth, lactation order and calving season did not influence the variability of milk fat and protein content. Heritability of observed milk traits was medium to low. The content of milk fat and protein had the lowest values of heritability, 0.014, and 0.024, respectively. The heritability of milk yield, milk fat yield and protein yield was 0.293, 0.319 and 0.273, respectively.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "Variability and heritability of milk traits of holstein - frisian bull dams and their progeny",
pages = "251-243",
number = "1",
volume = "50",
doi = "10.2298/GENSR1801243L"
}

Lazarević, M., Stanojević, D., Bogdanović, V., Pantelić, V., Maksimović, N., Marinković, M.,& Micić, N.. (2018). Variability and heritability of milk traits of holstein - frisian bull dams and their progeny. in Genetika
Društvo genetičara Srbije, Beograd., 50(1), 243-251.
https://doi.org/10.2298/GENSR1801243L

Lazarević M, Stanojević D, Bogdanović V, Pantelić V, Maksimović N, Marinković M, Micić N. Variability and heritability of milk traits of holstein - frisian bull dams and their progeny. in Genetika. 2018;50(1):243-251.
doi:10.2298/GENSR1801243L .

Lazarević, Marina, Stanojević, Dragan, Bogdanović, Vladan, Pantelić, Vlada, Maksimović, Nevena, Marinković, Milos, Micić, Nenad, "Variability and heritability of milk traits of holstein - frisian bull dams and their progeny" in Genetika, 50, no. 1 (2018):243-251,
https://doi.org/10.2298/GENSR1801243L . .

TY  - JOUR
AU  - Mićić, Nenad
AU  - Marinković, Miloš
AU  - Lazarević, Marina
AU  - Pantelić, Vlada
AU  - Ostojić-Andrić, Dušica
AU  - Stanojević, Dragan
AU  - Miletić, Aleksandar
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4861
AB  - The analysis included 433 daughters of 10 bulls, calving for the first time in the period from 2007 to 2014, on 6 dairy farms of the Agricultural Corporation Belgrade AD. Fixed factors included in the model were the effects of the farm, year of calving and calving season, and as a random factor the impact of the bull sire. The observed fertility properties on the basis of which breeding values were calculated were the number of days of gestation, the age at the first insemination, the service period duration and the calving interval. Bulls were ranked on the basis of these properties and using the Spearman correlation coefficient, the degree of agreement between the ranks was determined. According to the breeding values calculated by using the Best Linear Unbiased Prediction (BLUP) method, the sire 1517 was best ranked for the trait duration of service period (-34,94 days) and the calving interval (-36,14 days), relative to the average of daughters. The effects of the farm and year of calving showed no significance (p>0.05) except on the duration of the gestation. The effect of the calving season showed a very high significance (p lt 0.001) for the following properties: age at first insemination, duration of the service period and calving interval, as well as significance (p lt 0.05) for the property duration of the gestation. A statistically very significant degree of agreement between the service period and the calving interval of 0.99** (p  lt 0.01) was determined by the Spearman coefficient of correlation, while there was no significant difference between the other properties (p>0.05).
AB  - U analizu je uključeno 433 prvotelke, kćeri 10 bikova, prvi put oteljene u periodu od 2007. do 2014. godine, na 6 farmi krava Poljoprivredne korporacije Beograd AD. Kao fiksni faktori u modelu, uključeni su: uticaji farme, godina telenja i sezona telenja, i kao slučajan faktor uticaj bika oca. Praćene osobine plodnosti na osnovu kojih su izračunate priplodne vrednosti su: broj dana bremenitosti, uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval. Bikovi su rangirani na osnovu pomenutih osobina, a primenom Spirmanovog koeficijenta korelacije utvrđen je stepen slaganja između rangova. Prema izračunatim priplodnim vrednostima metodom najboljih linearnih objektivnih pokazatelja (Best Linear Unbiased Prediction - BLUP) utvrđeno je da je bik otac, broj 1517 je najbolje rangiran za osobine trajanje servis perioda (-34,94 dana) i međutelidbenog intervala (-36,14 dana) u odnosu na prosek kćeri.Uticaji farme i godine telenja nisu pokazali značajnost (p>0,05) samo kod osobine trajanje bremenitosti. Uticaj sezone telenja je pokazao vrlo visoku značajnost (p lt 0,001) za osobine: uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval, kao i značajnost (p lt 0,05) na osobinu trajanje bremenitosti. Spirmanovim koeficijentom korelacije utvrđen je statistički vrlo značajan stepen slaganja između trajanja servis perioda i međutelidbenog intervala (p lt 0,01), dok između drugih osobina nije bilo značajnosti (p>0,05).
PB  - Društvo selekcionara i semenara Republike Srbije, Beograd
T2  - Selekcija i semenarstvo
T1  - Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties
T1  - Procena priplodne vrednosti i rang bikova holštajn-frizijske rase na osobine plodnosti
EP  - 26
IS  - 1
SP  - 19
VL  - 24
DO  - 10.5937/SelSem1801019M
ER  - 

@article{
author = "Mićić, Nenad and Marinković, Miloš and Lazarević, Marina and Pantelić, Vlada and Ostojić-Andrić, Dušica and Stanojević, Dragan and Miletić, Aleksandar",
year = "2018",
abstract = "The analysis included 433 daughters of 10 bulls, calving for the first time in the period from 2007 to 2014, on 6 dairy farms of the Agricultural Corporation Belgrade AD. Fixed factors included in the model were the effects of the farm, year of calving and calving season, and as a random factor the impact of the bull sire. The observed fertility properties on the basis of which breeding values were calculated were the number of days of gestation, the age at the first insemination, the service period duration and the calving interval. Bulls were ranked on the basis of these properties and using the Spearman correlation coefficient, the degree of agreement between the ranks was determined. According to the breeding values calculated by using the Best Linear Unbiased Prediction (BLUP) method, the sire 1517 was best ranked for the trait duration of service period (-34,94 days) and the calving interval (-36,14 days), relative to the average of daughters. The effects of the farm and year of calving showed no significance (p>0.05) except on the duration of the gestation. The effect of the calving season showed a very high significance (p lt 0.001) for the following properties: age at first insemination, duration of the service period and calving interval, as well as significance (p lt 0.05) for the property duration of the gestation. A statistically very significant degree of agreement between the service period and the calving interval of 0.99** (p  lt 0.01) was determined by the Spearman coefficient of correlation, while there was no significant difference between the other properties (p>0.05)., U analizu je uključeno 433 prvotelke, kćeri 10 bikova, prvi put oteljene u periodu od 2007. do 2014. godine, na 6 farmi krava Poljoprivredne korporacije Beograd AD. Kao fiksni faktori u modelu, uključeni su: uticaji farme, godina telenja i sezona telenja, i kao slučajan faktor uticaj bika oca. Praćene osobine plodnosti na osnovu kojih su izračunate priplodne vrednosti su: broj dana bremenitosti, uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval. Bikovi su rangirani na osnovu pomenutih osobina, a primenom Spirmanovog koeficijenta korelacije utvrđen je stepen slaganja između rangova. Prema izračunatim priplodnim vrednostima metodom najboljih linearnih objektivnih pokazatelja (Best Linear Unbiased Prediction - BLUP) utvrđeno je da je bik otac, broj 1517 je najbolje rangiran za osobine trajanje servis perioda (-34,94 dana) i međutelidbenog intervala (-36,14 dana) u odnosu na prosek kćeri.Uticaji farme i godine telenja nisu pokazali značajnost (p>0,05) samo kod osobine trajanje bremenitosti. Uticaj sezone telenja je pokazao vrlo visoku značajnost (p lt 0,001) za osobine: uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval, kao i značajnost (p lt 0,05) na osobinu trajanje bremenitosti. Spirmanovim koeficijentom korelacije utvrđen je statistički vrlo značajan stepen slaganja između trajanja servis perioda i međutelidbenog intervala (p lt 0,01), dok između drugih osobina nije bilo značajnosti (p>0,05).",
publisher = "Društvo selekcionara i semenara Republike Srbije, Beograd",
journal = "Selekcija i semenarstvo",
title = "Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties, Procena priplodne vrednosti i rang bikova holštajn-frizijske rase na osobine plodnosti",
pages = "26-19",
number = "1",
volume = "24",
doi = "10.5937/SelSem1801019M"
}

Mićić, N., Marinković, M., Lazarević, M., Pantelić, V., Ostojić-Andrić, D., Stanojević, D.,& Miletić, A.. (2018). Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties. in Selekcija i semenarstvo
Društvo selekcionara i semenara Republike Srbije, Beograd., 24(1), 19-26.
https://doi.org/10.5937/SelSem1801019M

Mićić N, Marinković M, Lazarević M, Pantelić V, Ostojić-Andrić D, Stanojević D, Miletić A. Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties. in Selekcija i semenarstvo. 2018;24(1):19-26.
doi:10.5937/SelSem1801019M .

Mićić, Nenad, Marinković, Miloš, Lazarević, Marina, Pantelić, Vlada, Ostojić-Andrić, Dušica, Stanojević, Dragan, Miletić, Aleksandar, "Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties" in Selekcija i semenarstvo, 24, no. 1 (2018):19-26,
https://doi.org/10.5937/SelSem1801019M . .

TY  - THES
AU  - Stanojević, Dragan
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/51
AB  - The research was conducted with the aim to estimating genetic parameters of longevity traits as well as to choose adequate methodology and develop optimal model for genetic evaluation of longevity traits in the population of Black and White cattle in Serbia. Besides genetic parameters for longevity traits the culling reasons were also analysed. The research was conducted on the basis of set of data which included records on longevity, culling risks and origin of cows that started first calving in the period from 1989 to 2012 at the Agricultural Corporation Belgrade AD. The culling reason, according to their relationship, were divided into 10 categories and their share in the level of production, lactation in which animals were culled and share of Holstein Friesian breed genes was analysed. Longevity of cows was observed through three indicators: length of productive life (LPL), life milk yield (LMY) and number of realised lactations (NL). Set of data which included 12309 cows in total and on the basis of which the analysis of culling risks was conducted included only the culled animals with known reason for culling. Genetic evaluation of longevity was performed by means of Weibull proportional risk model within the survival analysis and linear models. Weibull model of proportional risk took into account fixed time-independent effects of farm, share of genes of Holstein Friesian breed and age at first calving while the effects of year and season of calving as well as relative milk yield and lactation were treated as fixed time-dependent effects. Sire was regarded as random time-independent effect (sire model). The use of Weibull proportional risk model enabled including the incomplete (censured) records into the analysis as well. Total number of cows involved in the set of data used in the survival analysis was 22109, out of which 26% were incomplete records. Set of data used for genetic evaluation of longevity traits by applying linear models contained data on 16539 cows whose length of productive life was known. Model used in genetic evaluation of longevity traits by applying linear models involved the farm, year and season of first calving, share of genes of Holstein Friesian breed, age at first calving and relative milk yield in first lactation as fixed factors, while the animal itself was treated as a random factor (animal model). The average length of productive life for all animals included in the analysis was 1267 days (41.7 months), that is 1300 days (42.7 months) for the animals with known length of productive life and 1170 days (38.4 months) for censored records...
AB  - Sprovedeno istraživanje imalo je za cilj da se procene genetski parametri osobina dugovečnosti, kao i da se odabere adekvatna metodologija i razvije optimalni model za genetsko vrednovanje osobina dugovečnosti u populaciji crno belih goveda u Srbiji. Pored genetskih parametara osobina dugovečnosti, analizirani su i razlozi izlučenja krava iz proizvodnje. Istraživanje je sprovedeno na setu podataka koji je obuhvatao podatke o dugovečnosti, razlozima izlučenja i poreklu krava, koje su se prvi put telile u periodu od 1989. do 2012. godine na Poljoprivrednoj korporaciji Beograd AD. Razlozi izlučenja su svrstani u 10 kategorija, prema srodnosti, i analiziran je njihov udeo prema nivou proizvodnje, laktaciji u kojoj su grla izlučena i udelu gena holštajn frizijske rase. Dugovečnost krava je posmatrana kroz tri pokazatelja: trajanje produktivnog života (LPL), životnu proizvodnju mleka (LMY) i broj ostvarenih laktacija (NL). Set podataka na kojem je izvršena analiza razloga izlučenja sadržao je samo grla koja su bila izlučena i imala su evidentiran razlog izlučenja, ukupno 12309 krava. Genetsko vrednovanje osobina dugovečnosti je izvršeno je upotrebom Weibull-ovog modela proporcionalnih rizika, u okviru analize preživljavanja, i linearnih modela. Weibull-ov model proporcionalnih rizika je uvažio fiksne vremenski nezavisne efekte farme, udela gena holštajn frizijske rase i uzrasta pri prvom teljenju, dok su efekti godine i sezone teljenja, kao i relativne proizvodnje mleka i laktacije tretirani kao fiksni vremenski zavisni uticaji. Otac je posmatran kao fiksni vremenski nezavisan uticaj (model oca). Primena Weibull-ovog modela proporcionalnih rizika omogućila je uključivanje u analizu i nepotpunih (cenzurisanih) zapisa. Ukupan broj krava koji se nalazio u setu podataka korišćenom u analizi preživljavanja bio je 22109, od čega su 26% činili nepotpuni zapisi. Set podataka koji je korišćen za genetsko vrednovanje osobina dugovečnosti upotrebom linearnih modela, sadržao je podatke o 16539 krava koje su imale poznato trajanje produktivnog života. Model koji je korišćen u genetskom vrednovanju osobina dugovečnosti upotrebom linearnih modela uvažio je farmu, godinu i sezonu prvog teljenja, udeo gena holštajn frizijske rase, uzrast pri prvom teljenju i relativnu proizvodnju mleka u prvoj laktaciji kao fiksne faktore, dok je sama životinja tretirana kao slučajan faktor (model individue)...
PB  - Univerzitet u Beogradu, Poljoprivredni fakultet
T1  - The estimation of genetic parameters of longevity traits in black and white cattle breed
T1  - Procena genetskih parametara osobina dugovečnosti goveda crno bele rase
UR  - https://hdl.handle.net/21.15107/rcub_nardus_8448
ER  - 

@phdthesis{
author = "Stanojević, Dragan",
year = "2017",
abstract = "The research was conducted with the aim to estimating genetic parameters of longevity traits as well as to choose adequate methodology and develop optimal model for genetic evaluation of longevity traits in the population of Black and White cattle in Serbia. Besides genetic parameters for longevity traits the culling reasons were also analysed. The research was conducted on the basis of set of data which included records on longevity, culling risks and origin of cows that started first calving in the period from 1989 to 2012 at the Agricultural Corporation Belgrade AD. The culling reason, according to their relationship, were divided into 10 categories and their share in the level of production, lactation in which animals were culled and share of Holstein Friesian breed genes was analysed. Longevity of cows was observed through three indicators: length of productive life (LPL), life milk yield (LMY) and number of realised lactations (NL). Set of data which included 12309 cows in total and on the basis of which the analysis of culling risks was conducted included only the culled animals with known reason for culling. Genetic evaluation of longevity was performed by means of Weibull proportional risk model within the survival analysis and linear models. Weibull model of proportional risk took into account fixed time-independent effects of farm, share of genes of Holstein Friesian breed and age at first calving while the effects of year and season of calving as well as relative milk yield and lactation were treated as fixed time-dependent effects. Sire was regarded as random time-independent effect (sire model). The use of Weibull proportional risk model enabled including the incomplete (censured) records into the analysis as well. Total number of cows involved in the set of data used in the survival analysis was 22109, out of which 26% were incomplete records. Set of data used for genetic evaluation of longevity traits by applying linear models contained data on 16539 cows whose length of productive life was known. Model used in genetic evaluation of longevity traits by applying linear models involved the farm, year and season of first calving, share of genes of Holstein Friesian breed, age at first calving and relative milk yield in first lactation as fixed factors, while the animal itself was treated as a random factor (animal model). The average length of productive life for all animals included in the analysis was 1267 days (41.7 months), that is 1300 days (42.7 months) for the animals with known length of productive life and 1170 days (38.4 months) for censored records..., Sprovedeno istraživanje imalo je za cilj da se procene genetski parametri osobina dugovečnosti, kao i da se odabere adekvatna metodologija i razvije optimalni model za genetsko vrednovanje osobina dugovečnosti u populaciji crno belih goveda u Srbiji. Pored genetskih parametara osobina dugovečnosti, analizirani su i razlozi izlučenja krava iz proizvodnje. Istraživanje je sprovedeno na setu podataka koji je obuhvatao podatke o dugovečnosti, razlozima izlučenja i poreklu krava, koje su se prvi put telile u periodu od 1989. do 2012. godine na Poljoprivrednoj korporaciji Beograd AD. Razlozi izlučenja su svrstani u 10 kategorija, prema srodnosti, i analiziran je njihov udeo prema nivou proizvodnje, laktaciji u kojoj su grla izlučena i udelu gena holštajn frizijske rase. Dugovečnost krava je posmatrana kroz tri pokazatelja: trajanje produktivnog života (LPL), životnu proizvodnju mleka (LMY) i broj ostvarenih laktacija (NL). Set podataka na kojem je izvršena analiza razloga izlučenja sadržao je samo grla koja su bila izlučena i imala su evidentiran razlog izlučenja, ukupno 12309 krava. Genetsko vrednovanje osobina dugovečnosti je izvršeno je upotrebom Weibull-ovog modela proporcionalnih rizika, u okviru analize preživljavanja, i linearnih modela. Weibull-ov model proporcionalnih rizika je uvažio fiksne vremenski nezavisne efekte farme, udela gena holštajn frizijske rase i uzrasta pri prvom teljenju, dok su efekti godine i sezone teljenja, kao i relativne proizvodnje mleka i laktacije tretirani kao fiksni vremenski zavisni uticaji. Otac je posmatran kao fiksni vremenski nezavisan uticaj (model oca). Primena Weibull-ovog modela proporcionalnih rizika omogućila je uključivanje u analizu i nepotpunih (cenzurisanih) zapisa. Ukupan broj krava koji se nalazio u setu podataka korišćenom u analizi preživljavanja bio je 22109, od čega su 26% činili nepotpuni zapisi. Set podataka koji je korišćen za genetsko vrednovanje osobina dugovečnosti upotrebom linearnih modela, sadržao je podatke o 16539 krava koje su imale poznato trajanje produktivnog života. Model koji je korišćen u genetskom vrednovanju osobina dugovečnosti upotrebom linearnih modela uvažio je farmu, godinu i sezonu prvog teljenja, udeo gena holštajn frizijske rase, uzrast pri prvom teljenju i relativnu proizvodnju mleka u prvoj laktaciji kao fiksne faktore, dok je sama životinja tretirana kao slučajan faktor (model individue)...",
publisher = "Univerzitet u Beogradu, Poljoprivredni fakultet",
title = "The estimation of genetic parameters of longevity traits in black and white cattle breed, Procena genetskih parametara osobina dugovečnosti goveda crno bele rase",
url = "https://hdl.handle.net/21.15107/rcub_nardus_8448"
}

Stanojević, D.. (2017). The estimation of genetic parameters of longevity traits in black and white cattle breed. 
Univerzitet u Beogradu, Poljoprivredni fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_8448

Stanojević D. The estimation of genetic parameters of longevity traits in black and white cattle breed. 2017;.
https://hdl.handle.net/21.15107/rcub_nardus_8448 .

Stanojević, Dragan, "The estimation of genetic parameters of longevity traits in black and white cattle breed" (2017),
https://hdl.handle.net/21.15107/rcub_nardus_8448 .

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  - Kučević, Denis
AU  - Trivunović, Snežana
AU  - Bogdanović, Vladan
AU  - Čobanović, Ksenija
AU  - Janković, Dobrila
AU  - Stanojević, Dragan
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4254
AB  - Possible differences between composition of raw milk due to dairy farming system (organic vs conventional) as well as seasonal variations were investigated. The samples were analysed during one year. A total of 6.782 samples of raw milk were collected (4.496 from organic farming). Dairy farms were located in the northern part of Republic of Serbia (Province of Vojvodina). The principle of analysis of raw milk samples was in accordance with the methodology by midinfrared spectrometry and flow cytometry. The fixed effect of system of farming and season (winter, spring, summer and fall) have shown a high statistical significance (P  lt  0.01) on all examined milk parameters except fat, total solids and somatic cell count, where the impact was slightly lower (P  lt  0.05). Significant difference wasn't found in number of bacterial colonies (P > 0.05). Composition of milk is also affected by a number of other factors, therefore it is recommended to involve factors such as nutrition of dairy cows, breed and farm management.
AB  - Cilj rada je bio da se ispitaju razlike između sirovog mleka dobijenog u različitim sezonama i sistemima proizvodnje (organska/ konvencionalna). Uzorci mleka su sakupljani u toku čitave godine. Ukupno je sakupljeno 6782 (od čega 4496 iz organske proizvodnje). Farme su bile locirane na severnom delu Srbije (AP Vojvodina). Sirovi uzorci mleka su analizirani u skladu sa metodologijom infracrvene spektometrije i protočne citometrije. Fiksni uticaji sistema proizvodnje i sezone (zima, proleće, leto i jesen) su pokazali visoku signifikantnu značajnost (P  lt  0,01) na sve ispitivane parametre mleka osim na mlečnu mast, ukupnu suvu materiju i ukupan broj somatskih ćelija, gde je uticaj bio signifikantan na nivou (P  lt  0,05). Statistički značajna razlika nije pronađena u ukupnom broju bakterija (kolonija) (P > 0,05). Na sastav mleka takođe utiče i veliki broj drugih faktora, stoga je za preporuku da se u ispitivanje uključe i faktori poput ishrane mlečnih krava, rase i farmskog menadžmenta.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Composition of raw milk from conventional and organic dairy farming
T1  - Sastav sirovog mleka dobijen u sistemu konvencionalne i organske proizvodnje
EP  - 143
IS  - 2
SP  - 133
VL  - 32
DO  - 10.2298/BAH1602133K
ER  - 

@article{
author = "Kučević, Denis and Trivunović, Snežana and Bogdanović, Vladan and Čobanović, Ksenija and Janković, Dobrila and Stanojević, Dragan",
year = "2016",
abstract = "Possible differences between composition of raw milk due to dairy farming system (organic vs conventional) as well as seasonal variations were investigated. The samples were analysed during one year. A total of 6.782 samples of raw milk were collected (4.496 from organic farming). Dairy farms were located in the northern part of Republic of Serbia (Province of Vojvodina). The principle of analysis of raw milk samples was in accordance with the methodology by midinfrared spectrometry and flow cytometry. The fixed effect of system of farming and season (winter, spring, summer and fall) have shown a high statistical significance (P  lt  0.01) on all examined milk parameters except fat, total solids and somatic cell count, where the impact was slightly lower (P  lt  0.05). Significant difference wasn't found in number of bacterial colonies (P > 0.05). Composition of milk is also affected by a number of other factors, therefore it is recommended to involve factors such as nutrition of dairy cows, breed and farm management., Cilj rada je bio da se ispitaju razlike između sirovog mleka dobijenog u različitim sezonama i sistemima proizvodnje (organska/ konvencionalna). Uzorci mleka su sakupljani u toku čitave godine. Ukupno je sakupljeno 6782 (od čega 4496 iz organske proizvodnje). Farme su bile locirane na severnom delu Srbije (AP Vojvodina). Sirovi uzorci mleka su analizirani u skladu sa metodologijom infracrvene spektometrije i protočne citometrije. Fiksni uticaji sistema proizvodnje i sezone (zima, proleće, leto i jesen) su pokazali visoku signifikantnu značajnost (P  lt  0,01) na sve ispitivane parametre mleka osim na mlečnu mast, ukupnu suvu materiju i ukupan broj somatskih ćelija, gde je uticaj bio signifikantan na nivou (P  lt  0,05). Statistički značajna razlika nije pronađena u ukupnom broju bakterija (kolonija) (P > 0,05). Na sastav mleka takođe utiče i veliki broj drugih faktora, stoga je za preporuku da se u ispitivanje uključe i faktori poput ishrane mlečnih krava, rase i farmskog menadžmenta.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Composition of raw milk from conventional and organic dairy farming, Sastav sirovog mleka dobijen u sistemu konvencionalne i organske proizvodnje",
pages = "143-133",
number = "2",
volume = "32",
doi = "10.2298/BAH1602133K"
}

Kučević, D., Trivunović, S., Bogdanović, V., Čobanović, K., Janković, D.,& Stanojević, D.. (2016). Composition of raw milk from conventional and organic dairy farming. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 32(2), 133-143.
https://doi.org/10.2298/BAH1602133K

Kučević D, Trivunović S, Bogdanović V, Čobanović K, Janković D, Stanojević D. Composition of raw milk from conventional and organic dairy farming. in Biotechnology in Animal Husbandry. 2016;32(2):133-143.
doi:10.2298/BAH1602133K .

Kučević, Denis, Trivunović, Snežana, Bogdanović, Vladan, Čobanović, Ksenija, Janković, Dobrila, Stanojević, Dragan, "Composition of raw milk from conventional and organic dairy farming" in Biotechnology in Animal Husbandry, 32, no. 2 (2016):133-143,
https://doi.org/10.2298/BAH1602133K . .

TY  - CONF
AU  - Popović, Nikola
AU  - Beskorovajni, Radmila
AU  - Stanojević, Dragan
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5587
AB  - Modern beef production in intensive rearing conditions imposes a need for constant improvement of production traits of individuals. Meeting the growing requirements that accompany this type of production means the provision of optimal rearing conditions, not only in terms of cattle nutrition, care and housing but also in terms of health. Milk yield, milk fat and protein are properties of primary importance in dairy cattle breeding. These properties express a pronounced variability that occurs due to a large number of factors. The paper presents the average values and phenotypic variability of major milk production traits in the black-and-white cattle population raised on the farm "PK Beograd". In the first three standard lactations the average milk yield was 7.241 kg with 3.56% fat. The impact of major non-genetic factors (farm, year, season of calving) on the expression of milk production traits was also observed. The impact of the examined factors on the variability of the production traits was highly significant (P  lt 0.01).
AB  - Savremena govedarska proizvodnja u intenzivnim uslovima odgajivanja nameće potrebu konstantnog unapređenja proizvodnih osobina jedinki. Realizacija sve većih zahteva koji prate ovu proizvodnju podrazumeva obezbeđenje optimalnih uslova gajenja, kako u pogledu ishrane, nege i smeštaja, tako i zdravstvenog stanja goveda. Prinosi mleka, mlečne masti i proteina su osobine od primarnog značaja u selekciji i oplemenjivanju mlečnih rasa goveda. Ove osobine pokazuju izraženu varijabilnost koja se javlja usled delovanja velikog broja činilaca na njihovu ispoljenost. U radu su prikazane prosečne vrednosti i fenotipska varijabilnost važnijih osobina mlečnosti u populaciji crno belih goveda gajenih na farmi PK “Beograd”. U prve tri standardne laktacije ostvaren je prosečan prinos od 7241 kg mleka sa 3,56% mlečne masti. Posmatran je i uticaj važnijih negenetskih faktora (farme, godine, sezone teljenja) na ispoljenost osobina mlečnosti. Ustanovljen je visoko značajan uticaj ispitivanih faktora na varijabilnost posmatranih proizvodnih svojstava (P lt  0.01).
C3  - 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015.
T1  - Impact of Major Non-Genetic Factors on Phenotypic Variability of Milk Production Traits in the Black And White Cattle Population
T1  - Uticaj važnijih negenetskih faktora na fenotipsku varijabilnost osobina mlečnosti u populaciji crno belih goveda
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5587
ER  - 

@conference{
author = "Popović, Nikola and Beskorovajni, Radmila and Stanojević, Dragan",
year = "2015",
abstract = "Modern beef production in intensive rearing conditions imposes a need for constant improvement of production traits of individuals. Meeting the growing requirements that accompany this type of production means the provision of optimal rearing conditions, not only in terms of cattle nutrition, care and housing but also in terms of health. Milk yield, milk fat and protein are properties of primary importance in dairy cattle breeding. These properties express a pronounced variability that occurs due to a large number of factors. The paper presents the average values and phenotypic variability of major milk production traits in the black-and-white cattle population raised on the farm "PK Beograd". In the first three standard lactations the average milk yield was 7.241 kg with 3.56% fat. The impact of major non-genetic factors (farm, year, season of calving) on the expression of milk production traits was also observed. The impact of the examined factors on the variability of the production traits was highly significant (P  lt 0.01)., Savremena govedarska proizvodnja u intenzivnim uslovima odgajivanja nameće potrebu konstantnog unapređenja proizvodnih osobina jedinki. Realizacija sve većih zahteva koji prate ovu proizvodnju podrazumeva obezbeđenje optimalnih uslova gajenja, kako u pogledu ishrane, nege i smeštaja, tako i zdravstvenog stanja goveda. Prinosi mleka, mlečne masti i proteina su osobine od primarnog značaja u selekciji i oplemenjivanju mlečnih rasa goveda. Ove osobine pokazuju izraženu varijabilnost koja se javlja usled delovanja velikog broja činilaca na njihovu ispoljenost. U radu su prikazane prosečne vrednosti i fenotipska varijabilnost važnijih osobina mlečnosti u populaciji crno belih goveda gajenih na farmi PK “Beograd”. U prve tri standardne laktacije ostvaren je prosečan prinos od 7241 kg mleka sa 3,56% mlečne masti. Posmatran je i uticaj važnijih negenetskih faktora (farme, godine, sezone teljenja) na ispoljenost osobina mlečnosti. Ustanovljen je visoko značajan uticaj ispitivanih faktora na varijabilnost posmatranih proizvodnih svojstava (P lt  0.01).",
journal = "20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015.",
title = "Impact of Major Non-Genetic Factors on Phenotypic Variability of Milk Production Traits in the Black And White Cattle Population, Uticaj važnijih negenetskih faktora na fenotipsku varijabilnost osobina mlečnosti u populaciji crno belih goveda",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5587"
}

Popović, N., Beskorovajni, R.,& Stanojević, D.. (2015). Impact of Major Non-Genetic Factors on Phenotypic Variability of Milk Production Traits in the Black And White Cattle Population. in 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015..
https://hdl.handle.net/21.15107/rcub_agrospace_5587

Popović N, Beskorovajni R, Stanojević D. Impact of Major Non-Genetic Factors on Phenotypic Variability of Milk Production Traits in the Black And White Cattle Population. in 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015.. 2015;.
https://hdl.handle.net/21.15107/rcub_agrospace_5587 .

Popović, Nikola, Beskorovajni, Radmila, Stanojević, Dragan, "Impact of Major Non-Genetic Factors on Phenotypic Variability of Milk Production Traits in the Black And White Cattle Population" in 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015. (2015),
https://hdl.handle.net/21.15107/rcub_agrospace_5587 .

TY  - JOUR
AU  - Perišić, Predrag
AU  - Bogdanović, Vladan
AU  - Mekić, Cvijan
AU  - Ružić-Muslić, Dragana
AU  - Stanojević, Dragan
AU  - Popovac, Mladen
AU  - Stepić, Stefan
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3867
AB  - This research paper gives an analysis on the size of world's domestic buffalo populations, their milk production and the size of buffalo population in Serbia. Population of domestic buffalo in the world is constantly increasing so that in 2013 there were 199 783 549 individuals, out of which in India in the same year they raised 57.77% of buffalo world population, in Pakistan 18.87%, and in China 11.64%. The share of total world production of buffalo milk in total world milk production in 2012 was 12.92 % or 97 417 135 t out of which 67.76% was produced in India. In Serbia buffalo is raised in the regions of Raška (about 1000 individuals) and Kosovo. Populations of buffalo in central Serbia show a tendency of decreasing in size what was the reason to start a programme of in situ conservation 10 years ago. On the sample of buffalo population encompassed by the programme of conservation the body measures were analysed indicating that the population of buffalo is quite unequalised and that average values obtained for exterior measures are similar to the results obtained by the authors of earlier period for the population of buffalo in the area of former Yugoslavia.
AB  - U radu je analizirano brojno stanje domaćih bivola u svetu, proizvodnja mleka bivola, kao i stanje populacije bivola u Srbiji. Populacija domaćih bivola u svetu stalno raste i 2013. godine bilo je 199.783.549 grla, a od tog broja u Indiji je u 2013. godini gajeno 57,77% svetske populacije bivola, u Pakistanu 18,87%, a u Kini 11,64%. Učešće ukupne svetske proizvodnje bivoljeg mleka u ukupnoj svetskoj proizvodnji mleka 2012. godine bilo je 12,92 % ili 97.417.135 t, a od toga je 67,76% proizvedeno u Indiji. U Srbiji bivoli se gaje u području Raške oblasti (oko 1000 bivola) i na području Kosova. Populacija bivola u centralnoj Srbiji ima tendenciju smanjenja veličine, zbog čega je pre 10 godina počeo da se sprovodi program konzervacije. Na uzorku populacije (37 bivolica) obuhvaćene programom in situ konzervacije utvrđene su prosečne vrednosti za telesne mere. Visina grebena bivolica u populaciji koja je merena bila je 125,97 cm, visina krsta 126,98cm, dužina trupa 142,19cm, dubina grudi 68,75 cm, širina grudi 44,48cm, a obim grudi 184,25 cm. Populacija bivolica je bila dosta neujednačena što ukazuje na odsustvo odgajivačko-selekcijskog rada kod bivola u Srbiji u prethodnim decenijama.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - The importance of buffalo in milk production and buffalo population in Serbia
T1  - Značaj bivola u proizvodnji mleka i stanje populacije u Srbiji
EP  - 263
IS  - 2
SP  - 255
VL  - 31
DO  - 10.2298/BAH1502255P
ER  - 

@article{
author = "Perišić, Predrag and Bogdanović, Vladan and Mekić, Cvijan and Ružić-Muslić, Dragana and Stanojević, Dragan and Popovac, Mladen and Stepić, Stefan",
year = "2015",
abstract = "This research paper gives an analysis on the size of world's domestic buffalo populations, their milk production and the size of buffalo population in Serbia. Population of domestic buffalo in the world is constantly increasing so that in 2013 there were 199 783 549 individuals, out of which in India in the same year they raised 57.77% of buffalo world population, in Pakistan 18.87%, and in China 11.64%. The share of total world production of buffalo milk in total world milk production in 2012 was 12.92 % or 97 417 135 t out of which 67.76% was produced in India. In Serbia buffalo is raised in the regions of Raška (about 1000 individuals) and Kosovo. Populations of buffalo in central Serbia show a tendency of decreasing in size what was the reason to start a programme of in situ conservation 10 years ago. On the sample of buffalo population encompassed by the programme of conservation the body measures were analysed indicating that the population of buffalo is quite unequalised and that average values obtained for exterior measures are similar to the results obtained by the authors of earlier period for the population of buffalo in the area of former Yugoslavia., U radu je analizirano brojno stanje domaćih bivola u svetu, proizvodnja mleka bivola, kao i stanje populacije bivola u Srbiji. Populacija domaćih bivola u svetu stalno raste i 2013. godine bilo je 199.783.549 grla, a od tog broja u Indiji je u 2013. godini gajeno 57,77% svetske populacije bivola, u Pakistanu 18,87%, a u Kini 11,64%. Učešće ukupne svetske proizvodnje bivoljeg mleka u ukupnoj svetskoj proizvodnji mleka 2012. godine bilo je 12,92 % ili 97.417.135 t, a od toga je 67,76% proizvedeno u Indiji. U Srbiji bivoli se gaje u području Raške oblasti (oko 1000 bivola) i na području Kosova. Populacija bivola u centralnoj Srbiji ima tendenciju smanjenja veličine, zbog čega je pre 10 godina počeo da se sprovodi program konzervacije. Na uzorku populacije (37 bivolica) obuhvaćene programom in situ konzervacije utvrđene su prosečne vrednosti za telesne mere. Visina grebena bivolica u populaciji koja je merena bila je 125,97 cm, visina krsta 126,98cm, dužina trupa 142,19cm, dubina grudi 68,75 cm, širina grudi 44,48cm, a obim grudi 184,25 cm. Populacija bivolica je bila dosta neujednačena što ukazuje na odsustvo odgajivačko-selekcijskog rada kod bivola u Srbiji u prethodnim decenijama.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "The importance of buffalo in milk production and buffalo population in Serbia, Značaj bivola u proizvodnji mleka i stanje populacije u Srbiji",
pages = "263-255",
number = "2",
volume = "31",
doi = "10.2298/BAH1502255P"
}

Perišić, P., Bogdanović, V., Mekić, C., Ružić-Muslić, D., Stanojević, D., Popovac, M.,& Stepić, S.. (2015). The importance of buffalo in milk production and buffalo population in Serbia. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 31(2), 255-263.
https://doi.org/10.2298/BAH1502255P

Perišić P, Bogdanović V, Mekić C, Ružić-Muslić D, Stanojević D, Popovac M, Stepić S. The importance of buffalo in milk production and buffalo population in Serbia. in Biotechnology in Animal Husbandry. 2015;31(2):255-263.
doi:10.2298/BAH1502255P .

Perišić, Predrag, Bogdanović, Vladan, Mekić, Cvijan, Ružić-Muslić, Dragana, Stanojević, Dragan, Popovac, Mladen, Stepić, Stefan, "The importance of buffalo in milk production and buffalo population in Serbia" in Biotechnology in Animal Husbandry, 31, no. 2 (2015):255-263,
https://doi.org/10.2298/BAH1502255P . .

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  - JOUR
AU  - Lazarević, M.
AU  - Nikšić, Dragan
AU  - Pantelić, Vlada
AU  - Stanišić, Nikola
AU  - Delić, N.
AU  - Stanojević, Dragan
AU  - Novaković, Ž.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3869
AB  - To test the variability of traits of Simmental bulls in performance test, data of the Livestock - Veterinary Centres for Reproduction and Artificial Insemination of Velika Plana and Krnjača were used. In the analysis, data on 113 performance tested bulls born from 2008 to 2009 were used. The analysis included two sets of characteristics: body development traits and growth traits. The average body mass of calves entering the test was 195.75 kg, while the body mass at the end of the test was 476.50 kg, average daily gain in the test was 1138.69 g. Average values of body development traits measured at the end of the test, with 12 months of age were: height at withers 127.13 cm, chest circumference 179.42 cm, the chest depth 61.19 cm and body length 151.34 cm. The influence of their sires, the year and the Centre on the variability of traits was studied. The effect of age is present at a high level of statistical significance (p lt 0.01) for all traits that are registered at the end of the test, while the effect of the Centre was present in the variability of body mass at the end of the test, the daily gain in the test and the length of the body. The bulls-sires' influence was demonstrated (p lt 0.05) on the variability in body mass of calves entering the test.
AB  - Za ispitivanje varijabilnosti osobina simentalskih bikova u performans testu iskorišćeni su podaci stočarsko-veterinarskog centra za reprodukciju i veštačko osemenjavanje iz Velike Plane i Krnjače. Za analizu su upotrebljeni podaci o 113 performans testiranih bikova rođenih u periodu od 2008 do 2009 godine. Analizom su obuhvaćene dve grupe osobina: osobine telesne razvijenosti i osobine porasta. Prosečna telesna masa sa kojom su telad ulazila u test iznosila je 195,75 kg, dok je telesna masa na kraju testa 476,50 kg, prosečan dnevni prirast u testu iznosio je 1138,69 g. Prosečne vrednosti osobina telesne razvijenosti merenim na kraju testa, sa 12 meseci uzrasta iznosile su: visina grebena 127.13 cm, obim grudi 179.42 cm, dubina grudi 61.19 cm i dužina trupa 151.34 cm. Analizirani su uticaj očeva, godine i centra na varijabilnost osobina. Efekat godine je prisutan na visokom nivou statističke značajnosti (p lt 0,01) za sve osobine koje se registruju na kraju testa, dok je efekat centra prisutan u varijabilnosti telesne mase na kraju testa, dnevnog prirasta u testu i dužini tela. Bikovi-očevi su ispoljili uticaj (p lt 0,05) na varijabilnost telesne mase sa kojom su telad ulazila u test.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Sources of variability of growth and body development traits of Simmental bulls in performance test
T1  - Izvori varijabilnosti osobina porasta i telesne razvijenosti bikova Simentalske rase u performans testu
EP  - 348
IS  - 3
SP  - 339
VL  - 31
DO  - 10.2298/BAH1503339L
ER  - 

@article{
author = "Lazarević, M. and Nikšić, Dragan and Pantelić, Vlada and Stanišić, Nikola and Delić, N. and Stanojević, Dragan and Novaković, Ž.",
year = "2015",
abstract = "To test the variability of traits of Simmental bulls in performance test, data of the Livestock - Veterinary Centres for Reproduction and Artificial Insemination of Velika Plana and Krnjača were used. In the analysis, data on 113 performance tested bulls born from 2008 to 2009 were used. The analysis included two sets of characteristics: body development traits and growth traits. The average body mass of calves entering the test was 195.75 kg, while the body mass at the end of the test was 476.50 kg, average daily gain in the test was 1138.69 g. Average values of body development traits measured at the end of the test, with 12 months of age were: height at withers 127.13 cm, chest circumference 179.42 cm, the chest depth 61.19 cm and body length 151.34 cm. The influence of their sires, the year and the Centre on the variability of traits was studied. The effect of age is present at a high level of statistical significance (p lt 0.01) for all traits that are registered at the end of the test, while the effect of the Centre was present in the variability of body mass at the end of the test, the daily gain in the test and the length of the body. The bulls-sires' influence was demonstrated (p lt 0.05) on the variability in body mass of calves entering the test., Za ispitivanje varijabilnosti osobina simentalskih bikova u performans testu iskorišćeni su podaci stočarsko-veterinarskog centra za reprodukciju i veštačko osemenjavanje iz Velike Plane i Krnjače. Za analizu su upotrebljeni podaci o 113 performans testiranih bikova rođenih u periodu od 2008 do 2009 godine. Analizom su obuhvaćene dve grupe osobina: osobine telesne razvijenosti i osobine porasta. Prosečna telesna masa sa kojom su telad ulazila u test iznosila je 195,75 kg, dok je telesna masa na kraju testa 476,50 kg, prosečan dnevni prirast u testu iznosio je 1138,69 g. Prosečne vrednosti osobina telesne razvijenosti merenim na kraju testa, sa 12 meseci uzrasta iznosile su: visina grebena 127.13 cm, obim grudi 179.42 cm, dubina grudi 61.19 cm i dužina trupa 151.34 cm. Analizirani su uticaj očeva, godine i centra na varijabilnost osobina. Efekat godine je prisutan na visokom nivou statističke značajnosti (p lt 0,01) za sve osobine koje se registruju na kraju testa, dok je efekat centra prisutan u varijabilnosti telesne mase na kraju testa, dnevnog prirasta u testu i dužini tela. Bikovi-očevi su ispoljili uticaj (p lt 0,05) na varijabilnost telesne mase sa kojom su telad ulazila u test.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Sources of variability of growth and body development traits of Simmental bulls in performance test, Izvori varijabilnosti osobina porasta i telesne razvijenosti bikova Simentalske rase u performans testu",
pages = "348-339",
number = "3",
volume = "31",
doi = "10.2298/BAH1503339L"
}

Lazarević, M., Nikšić, D., Pantelić, V., Stanišić, N., Delić, N., Stanojević, D.,& Novaković, Ž.. (2015). Sources of variability of growth and body development traits of Simmental bulls in performance test. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 31(3), 339-348.
https://doi.org/10.2298/BAH1503339L

Lazarević M, Nikšić D, Pantelić V, Stanišić N, Delić N, Stanojević D, Novaković Ž. Sources of variability of growth and body development traits of Simmental bulls in performance test. in Biotechnology in Animal Husbandry. 2015;31(3):339-348.
doi:10.2298/BAH1503339L .

Lazarević, M., Nikšić, Dragan, Pantelić, Vlada, Stanišić, Nikola, Delić, N., Stanojević, Dragan, Novaković, Ž., "Sources of variability of growth and body development traits of Simmental bulls in performance test" in Biotechnology in Animal Husbandry, 31, no. 3 (2015):339-348,
https://doi.org/10.2298/BAH1503339L . .

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  - Popovac, M.
AU  - Radojković, D.
AU  - Petrović, M.
AU  - Gogić, M.
AU  - Savić, R.
AU  - Stanojević, D.
AU  - Miletić, A.
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5540
AB  - The goal of this research paper was to assess the breeding value of first farrowed Swedish Landrace sows by the means of selection indices method. The traits on the basis of which the breeding value of animals was assessed are following: daily  liveweight gain, average thickness of collected back fat measured at five sites and number of liveborn piglets in the first litter. The liveweight gain and carcass quality traits determined at the end of performance test were corrected for the body mass of 100kg by the method of basic indexes and following mean values were determined: for corrected daily liveweight gain (KZDP) 499.92g/day and for corrected average collected backfat thickness (KSL) 20.01mm. The first farrowed sows on average produced 8.09 liveborn piglets in the litter. Studying the effect of the gilts` birth year and season on KZDP and KSL it was determined that the gilts` birth year and season had no statistically significant influence (P>0.05) on KZDP variation but they had a statistically significant effect on KSL (P lt 0.01). The year and the season of farrowing and the class of backfat thickness in performance test did not display any statistically significant effect (P>0.05) on BZPL, while the KZDP class and the age at first farrowing had a statistically significant effect on the variability of these trait (P lt 0.05; P lt 0.01). All studied traits varied statistically significantly (P lt 0.01) under the impact of the gilts` sire or dam. Heritability coefficients were: h2= 0.402 for KZDP, h2= 0.261 for KSL and h2= 0.177 for BZPL. The relation between KZDP and KSL was of a medium strength both at phenotype and genetic levels (rph=0.491; rg=0.411), while the relation of these traits with BZPL did not exist, except for the genetic relationship between KSL and KZDP which was of a medium strength (rg=0.252). Three equations for the selection indexes were constructed among which as the most optimal was chosen the one which includes all three traits (KZDP, KSL and BZPL) and whose correlation coefficent of selection index and aggregate  genotype was rIAG = 0.5473.
C3  - International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia
T1  - The Assessment of Breeding Value of First Farrowed Sows by the Method of Selection Indices
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5540
ER  - 

@conference{
author = "Popovac, M. and Radojković, D. and Petrović, M. and Gogić, M. and Savić, R. and Stanojević, D. and Miletić, A.",
year = "2014",
abstract = "The goal of this research paper was to assess the breeding value of first farrowed Swedish Landrace sows by the means of selection indices method. The traits on the basis of which the breeding value of animals was assessed are following: daily  liveweight gain, average thickness of collected back fat measured at five sites and number of liveborn piglets in the first litter. The liveweight gain and carcass quality traits determined at the end of performance test were corrected for the body mass of 100kg by the method of basic indexes and following mean values were determined: for corrected daily liveweight gain (KZDP) 499.92g/day and for corrected average collected backfat thickness (KSL) 20.01mm. The first farrowed sows on average produced 8.09 liveborn piglets in the litter. Studying the effect of the gilts` birth year and season on KZDP and KSL it was determined that the gilts` birth year and season had no statistically significant influence (P>0.05) on KZDP variation but they had a statistically significant effect on KSL (P lt 0.01). The year and the season of farrowing and the class of backfat thickness in performance test did not display any statistically significant effect (P>0.05) on BZPL, while the KZDP class and the age at first farrowing had a statistically significant effect on the variability of these trait (P lt 0.05; P lt 0.01). All studied traits varied statistically significantly (P lt 0.01) under the impact of the gilts` sire or dam. Heritability coefficients were: h2= 0.402 for KZDP, h2= 0.261 for KSL and h2= 0.177 for BZPL. The relation between KZDP and KSL was of a medium strength both at phenotype and genetic levels (rph=0.491; rg=0.411), while the relation of these traits with BZPL did not exist, except for the genetic relationship between KSL and KZDP which was of a medium strength (rg=0.252). Three equations for the selection indexes were constructed among which as the most optimal was chosen the one which includes all three traits (KZDP, KSL and BZPL) and whose correlation coefficent of selection index and aggregate  genotype was rIAG = 0.5473.",
journal = "International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia",
title = "The Assessment of Breeding Value of First Farrowed Sows by the Method of Selection Indices",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5540"
}

Popovac, M., Radojković, D., Petrović, M., Gogić, M., Savić, R., Stanojević, D.,& Miletić, A.. (2014). The Assessment of Breeding Value of First Farrowed Sows by the Method of Selection Indices. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia.
https://hdl.handle.net/21.15107/rcub_agrospace_5540

Popovac M, Radojković D, Petrović M, Gogić M, Savić R, Stanojević D, Miletić A. The Assessment of Breeding Value of First Farrowed Sows by the Method of Selection Indices. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia. 2014;.
https://hdl.handle.net/21.15107/rcub_agrospace_5540 .

Popovac, M., Radojković, D., Petrović, M., Gogić, M., Savić, R., Stanojević, D., Miletić, A., "The Assessment of Breeding Value of First Farrowed Sows by the Method of Selection Indices" in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia (2014),
https://hdl.handle.net/21.15107/rcub_agrospace_5540 .