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  - 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  - Vucković, Goran
AU  - Bobić, Tina
AU  - Mijić, Pero
AU  - Gavran, Mirna
AU  - Gregić, Maja
AU  - Potocnik, Klemen
AU  - Bogdanović, Vladan
AU  - Gantner, Vesna
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5271
AB  - In order to estimate the variance components as well as the breeding value for daily milk production of Holstein cows in terms of heat stress defined as different THI threshold values (68, 70, and 72) 1,275,713 test-day records from 90,159 cows were used. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Daily milk production was analysed as a bivariate variable, in the normal conditions (under the set THIthreshold value), and in terms of heat stress (above the set THIthreshold value) using a model that accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal. The estimated high genetic correlations between the daily milk production in normal and heat stress conditions, as well as high correlations among the EBVs in normal and heat stress conditions, point out that Holstein cows with high productivity in normal condition will sustain an alike level of production even in terms of heat stress. These results indicate that the Holstein cows are very well acclimatized to the environmental conditions at dairy farms in Croatia. However, these findings should be taken with caution, given that measurements of microclimate parameters were conducted only once at a milk recording day, so the reliability of such measurements could be questionable. In conclusion, in order to realize a completely unambiguous conclusion, further studies that include multiple daily measurements of microclimatic parameters in the farms facilities are necessary.
PB  - Croatian Dairy Union, Zagreb
T2  - Mljekarstvo
T1  - Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress
EP  - 209
IS  - 3
SP  - 201
VL  - 70
DO  - 10.15567/mljekarstvo.2020.0306
ER  - 

@article{
author = "Vucković, Goran and Bobić, Tina and Mijić, Pero and Gavran, Mirna and Gregić, Maja and Potocnik, Klemen and Bogdanović, Vladan and Gantner, Vesna",
year = "2020",
abstract = "In order to estimate the variance components as well as the breeding value for daily milk production of Holstein cows in terms of heat stress defined as different THI threshold values (68, 70, and 72) 1,275,713 test-day records from 90,159 cows were used. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Daily milk production was analysed as a bivariate variable, in the normal conditions (under the set THIthreshold value), and in terms of heat stress (above the set THIthreshold value) using a model that accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal. The estimated high genetic correlations between the daily milk production in normal and heat stress conditions, as well as high correlations among the EBVs in normal and heat stress conditions, point out that Holstein cows with high productivity in normal condition will sustain an alike level of production even in terms of heat stress. These results indicate that the Holstein cows are very well acclimatized to the environmental conditions at dairy farms in Croatia. However, these findings should be taken with caution, given that measurements of microclimate parameters were conducted only once at a milk recording day, so the reliability of such measurements could be questionable. In conclusion, in order to realize a completely unambiguous conclusion, further studies that include multiple daily measurements of microclimatic parameters in the farms facilities are necessary.",
publisher = "Croatian Dairy Union, Zagreb",
journal = "Mljekarstvo",
title = "Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress",
pages = "209-201",
number = "3",
volume = "70",
doi = "10.15567/mljekarstvo.2020.0306"
}

Vucković, G., Bobić, T., Mijić, P., Gavran, M., Gregić, M., Potocnik, K., Bogdanović, V.,& Gantner, V.. (2020). Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress. in Mljekarstvo
Croatian Dairy Union, Zagreb., 70(3), 201-209.
https://doi.org/10.15567/mljekarstvo.2020.0306

Vucković G, Bobić T, Mijić P, Gavran M, Gregić M, Potocnik K, Bogdanović V, Gantner V. Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress. in Mljekarstvo. 2020;70(3):201-209.
doi:10.15567/mljekarstvo.2020.0306 .

Vucković, Goran, Bobić, Tina, Mijić, Pero, Gavran, Mirna, Gregić, Maja, Potocnik, Klemen, Bogdanović, Vladan, Gantner, Vesna, "Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress" in Mljekarstvo, 70, no. 3 (2020):201-209,
https://doi.org/10.15567/mljekarstvo.2020.0306 . .

TY  - JOUR
AU  - Vucković, Goran
AU  - Bobić, Tina
AU  - Mijić, Pero
AU  - Gavran, Mirna
AU  - Gregić, Maja
AU  - Potocnik, Klemen
AU  - Bogdanović, Vladan
AU  - Gantner, Vesna
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5295
AB  - Variance components for daily milk production as well as breeding value of dairy Simmentals for daily milk production in terms of heat stress defined as different values of THI threshold values (72, 74, and 76) were estimated using 1,636,192 test-day records provided by the Croatian Agricultural Agency. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Bivariate estimation model accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal Obtained high genetic correlations between the daily milk production in normal and condition characterized by heat stress, as well as very high correlations between the EBVs in normal and heat stress conditions indicate animals' high level of acclimatization to the environment on dairy cattle farms. Since microclimate measurements were carried out only once at a milk recording day, these results should be taken with caution. Generally, further research with multiple daily measurements of the microclimate parameters in the facilities is necessary to provide a fully unambiguous conclusion.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress
EP  - 650
IS  - 2
SP  - 641
VL  - 52
DO  - 10.2298/GENSR2002641V
ER  - 

@article{
author = "Vucković, Goran and Bobić, Tina and Mijić, Pero and Gavran, Mirna and Gregić, Maja and Potocnik, Klemen and Bogdanović, Vladan and Gantner, Vesna",
year = "2020",
abstract = "Variance components for daily milk production as well as breeding value of dairy Simmentals for daily milk production in terms of heat stress defined as different values of THI threshold values (72, 74, and 76) were estimated using 1,636,192 test-day records provided by the Croatian Agricultural Agency. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Bivariate estimation model accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal Obtained high genetic correlations between the daily milk production in normal and condition characterized by heat stress, as well as very high correlations between the EBVs in normal and heat stress conditions indicate animals' high level of acclimatization to the environment on dairy cattle farms. Since microclimate measurements were carried out only once at a milk recording day, these results should be taken with caution. Generally, further research with multiple daily measurements of the microclimate parameters in the facilities is necessary to provide a fully unambiguous conclusion.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress",
pages = "650-641",
number = "2",
volume = "52",
doi = "10.2298/GENSR2002641V"
}

Vucković, G., Bobić, T., Mijić, P., Gavran, M., Gregić, M., Potocnik, K., Bogdanović, V.,& Gantner, V.. (2020). Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress. in Genetika
Društvo genetičara Srbije, Beograd., 52(2), 641-650.
https://doi.org/10.2298/GENSR2002641V

Vucković G, Bobić T, Mijić P, Gavran M, Gregić M, Potocnik K, Bogdanović V, Gantner V. Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress. in Genetika. 2020;52(2):641-650.
doi:10.2298/GENSR2002641V .

Vucković, Goran, Bobić, Tina, Mijić, Pero, Gavran, Mirna, Gregić, Maja, Potocnik, Klemen, Bogdanović, Vladan, Gantner, Vesna, "Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress" in Genetika, 52, no. 2 (2020):641-650,
https://doi.org/10.2298/GENSR2002641V . .

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

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

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

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

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

TY  - JOUR
AU  - 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  - Vučković, Goran
AU  - Bobić, Tina
AU  - Mijić, Pero
AU  - Gavran, Mirna
AU  - Potočnik, Klemen
AU  - Bogdanović, Vladan
AU  - Gantner, Vesna
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5195
AB  - Aiming determination of the variability of production traits (daily milk yield and composition) and microclimate parameters (ambient temperature and humidity) in the barns; as well as the correlation between the analyzed groups of traits, 1,636,192 test-day records from Simmentals and 1,275,713 test-day records from Holsteins were analysed. Performed analysis indicate high variability of production traits due to cow's breed, parity as well as breeding region. Also, high variability of microclimate parameters in the barns due to season and breeding region was found. Furthermore, statistically highly significant (p  lt  0.001) correlations between the production traits and microclimate parameters were determined. Finally, the negative effect of inadequate microclimate on daily milk production was determined in both breeds in all breeding regions. Since genetic evaluation and selection of dairy cattle for heat resistance is only long-term method for heat stress managing, determined effect will be taken into account in the statistical model for estimation of genetic parameters and breeding values.
AB  - Cilj istraživanja je bio određivanje varijabilnosti proizvodnih osobina (dnevni prinos i sastav mleka) i mikroklimatskih parametara (temperatura i vlažnost okoline) u objektima za držanje krava za proizvodnju mleka; kao i korelacija između analiziranih grupa osobina; 1.636.192 zapisa za grla simentalske rase i 1.275.713 zapisa test dana grla holštajn rase. Izvršene analize pokazuju veliku varijabilnost proizvodnih osobina zbog rase krava, pariteta kao i odgajivaĉkog regiona. Takođe je utvrđena velika varijabilnost mikroklimatskih parametara u objektima zbog sezone i odgajivačkog regiona. Pored toga, utvrđene su statistički vrlo značajne (p lt 0,001) korelacije između proizvodnih svojstava i parametara mikroklime. Konačno, negativan uticaj neadekvatne mikroklime na svakodnevnu proizvodnju mleka utvrđen je kod obe rase u svim odgajivačkim regionima. Pošto je genetska procena i selekcija mlečnih goveda na otpornost na visoke temperature sredine samo dugoročna metoda za upravljanje toplotnim stresom, utvrđeni efekat biće uzet u obzir u statističkom modelu za procenu genetskih parametara i odgajivačkih vrednosti.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Analysis of production traits and microclimate parameters on dairy cattle farms
T1  - Analiza proizvodnih karakteristika i mikroklimatskih parametara na farmama za proizvodnju mleka
EP  - 334
IS  - 4
SP  - 323
VL  - 35
DO  - 10.2298/BAH1904323V
ER  - 

@article{
author = "Vučković, Goran and Bobić, Tina and Mijić, Pero and Gavran, Mirna and Potočnik, Klemen and Bogdanović, Vladan and Gantner, Vesna",
year = "2019",
abstract = "Aiming determination of the variability of production traits (daily milk yield and composition) and microclimate parameters (ambient temperature and humidity) in the barns; as well as the correlation between the analyzed groups of traits, 1,636,192 test-day records from Simmentals and 1,275,713 test-day records from Holsteins were analysed. Performed analysis indicate high variability of production traits due to cow's breed, parity as well as breeding region. Also, high variability of microclimate parameters in the barns due to season and breeding region was found. Furthermore, statistically highly significant (p  lt  0.001) correlations between the production traits and microclimate parameters were determined. Finally, the negative effect of inadequate microclimate on daily milk production was determined in both breeds in all breeding regions. Since genetic evaluation and selection of dairy cattle for heat resistance is only long-term method for heat stress managing, determined effect will be taken into account in the statistical model for estimation of genetic parameters and breeding values., Cilj istraživanja je bio određivanje varijabilnosti proizvodnih osobina (dnevni prinos i sastav mleka) i mikroklimatskih parametara (temperatura i vlažnost okoline) u objektima za držanje krava za proizvodnju mleka; kao i korelacija između analiziranih grupa osobina; 1.636.192 zapisa za grla simentalske rase i 1.275.713 zapisa test dana grla holštajn rase. Izvršene analize pokazuju veliku varijabilnost proizvodnih osobina zbog rase krava, pariteta kao i odgajivaĉkog regiona. Takođe je utvrđena velika varijabilnost mikroklimatskih parametara u objektima zbog sezone i odgajivačkog regiona. Pored toga, utvrđene su statistički vrlo značajne (p lt 0,001) korelacije između proizvodnih svojstava i parametara mikroklime. Konačno, negativan uticaj neadekvatne mikroklime na svakodnevnu proizvodnju mleka utvrđen je kod obe rase u svim odgajivačkim regionima. Pošto je genetska procena i selekcija mlečnih goveda na otpornost na visoke temperature sredine samo dugoročna metoda za upravljanje toplotnim stresom, utvrđeni efekat biće uzet u obzir u statističkom modelu za procenu genetskih parametara i odgajivačkih vrednosti.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Analysis of production traits and microclimate parameters on dairy cattle farms, Analiza proizvodnih karakteristika i mikroklimatskih parametara na farmama za proizvodnju mleka",
pages = "334-323",
number = "4",
volume = "35",
doi = "10.2298/BAH1904323V"
}

Vučković, G., Bobić, T., Mijić, P., Gavran, M., Potočnik, K., Bogdanović, V.,& Gantner, V.. (2019). Analysis of production traits and microclimate parameters on dairy cattle farms. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 35(4), 323-334.
https://doi.org/10.2298/BAH1904323V

Vučković G, Bobić T, Mijić P, Gavran M, Potočnik K, Bogdanović V, Gantner V. Analysis of production traits and microclimate parameters on dairy cattle farms. in Biotechnology in Animal Husbandry. 2019;35(4):323-334.
doi:10.2298/BAH1904323V .

Vučković, Goran, Bobić, Tina, Mijić, Pero, Gavran, Mirna, Potočnik, Klemen, Bogdanović, Vladan, Gantner, Vesna, "Analysis of production traits and microclimate parameters on dairy cattle farms" in Biotechnology in Animal Husbandry, 35, no. 4 (2019):323-334,
https://doi.org/10.2298/BAH1904323V . .

TY  - CONF
AU  - Petrović, Milun
AU  - Rakonjac, Simeon
AU  - Bogdanović, Vladan
AU  - Bogosavljević-Bošković, Snežana
AU  - Djoković, Radojica
AU  - Dosković, Vladimir
AU  - Petrović, Miloš
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5650
AB  - An analysis of the phenotypic exposure and variability of lifetime milk production and milk fat and the content of milk fat of lifetime milk production was performed in 241 cows of Simental race distributed in three breeding areas (Čačak n = 67, Zlatibor n = 123 and Rudno n = 51).
Descriptive statistical analysis found that the average lifetime milk production and milk fat in all three breeding areas was 16081 and 627.2 kg with a variability of about 40%. The average number of lactations during the productive life of cows was 3.73 and ranged from 4.31 in the area of Čačak to 3.45 in the Rudna area. The variability was high and on average it was about 35%, which resulted from a wide variation interval ranging from only 3 to 10 lactation per head. The average content of lifetime productions milk fat was 3.91%. The content of milk fat of lifetime milk production, unlike milk production of milk and milk fat, is more influenced by genetic factors, which is why it is characterized by a very low variability of only 2.30%.
AB  - Analiza fenotipske ispoljenosti i varijabilnosti životne proizvodnje mleka i mlečne masti i sadržaja mlečne masti životne proizvodnje mleka sprovedena je kod 241 krave simentalske rase raspoređenih na tri odgajivačka područja (Čačak n=67, Zlatibor n=123 i Rudno n=51).
Deskriptivnom statističkom analizom ustanovljeno je da je prosečna životna proizvodnja mleka i mlečne masti na sva tri odgajivačka područja iznosila 16081 i 627,2 kg sa varijabilnošću od oko 40%. Prosečan broj laktacija u toku produktivnog života krava iznosio je 3,73 i kretao se od 4,31 na području Čačka do 3,45 na području Rudna. Varijabilnost je bila visoka i u proseku je iznosila oko 35%, što je posledica širokog intervala varijacije koji se kretao od svega 3 pa do 10 laktacija po grlu. Prosečan sadržaj mlečne masti životne proizvodnje mleka iznosio je 3,91%. Sadržaj mlečne masti životne proizvodnje mleka, za razliku od životne proizvodnje mleka i mlečne masti,više je pod uticajem genetskih faktora zbog čega se odlikuje dosta niskom varijabilnošću od svega 2,30%.
C3  - 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018.
T1  - Phenotypic Exposure and Variability of Livestocks Lifetime Production of Milk and Dairy Fats
T1  - Fenotipska ispoljenost i varijabilnost životne proizvodnje mleka i mlečne masti
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5650
ER  - 

@conference{
author = "Petrović, Milun and Rakonjac, Simeon and Bogdanović, Vladan and Bogosavljević-Bošković, Snežana and Djoković, Radojica and Dosković, Vladimir and Petrović, Miloš",
year = "2018",
abstract = "An analysis of the phenotypic exposure and variability of lifetime milk production and milk fat and the content of milk fat of lifetime milk production was performed in 241 cows of Simental race distributed in three breeding areas (Čačak n = 67, Zlatibor n = 123 and Rudno n = 51).
Descriptive statistical analysis found that the average lifetime milk production and milk fat in all three breeding areas was 16081 and 627.2 kg with a variability of about 40%. The average number of lactations during the productive life of cows was 3.73 and ranged from 4.31 in the area of Čačak to 3.45 in the Rudna area. The variability was high and on average it was about 35%, which resulted from a wide variation interval ranging from only 3 to 10 lactation per head. The average content of lifetime productions milk fat was 3.91%. The content of milk fat of lifetime milk production, unlike milk production of milk and milk fat, is more influenced by genetic factors, which is why it is characterized by a very low variability of only 2.30%., Analiza fenotipske ispoljenosti i varijabilnosti životne proizvodnje mleka i mlečne masti i sadržaja mlečne masti životne proizvodnje mleka sprovedena je kod 241 krave simentalske rase raspoređenih na tri odgajivačka područja (Čačak n=67, Zlatibor n=123 i Rudno n=51).
Deskriptivnom statističkom analizom ustanovljeno je da je prosečna životna proizvodnja mleka i mlečne masti na sva tri odgajivačka područja iznosila 16081 i 627,2 kg sa varijabilnošću od oko 40%. Prosečan broj laktacija u toku produktivnog života krava iznosio je 3,73 i kretao se od 4,31 na području Čačka do 3,45 na području Rudna. Varijabilnost je bila visoka i u proseku je iznosila oko 35%, što je posledica širokog intervala varijacije koji se kretao od svega 3 pa do 10 laktacija po grlu. Prosečan sadržaj mlečne masti životne proizvodnje mleka iznosio je 3,91%. Sadržaj mlečne masti životne proizvodnje mleka, za razliku od životne proizvodnje mleka i mlečne masti,više je pod uticajem genetskih faktora zbog čega se odlikuje dosta niskom varijabilnošću od svega 2,30%.",
journal = "23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018.",
title = "Phenotypic Exposure and Variability of Livestocks Lifetime Production of Milk and Dairy Fats, Fenotipska ispoljenost i varijabilnost životne proizvodnje mleka i mlečne masti",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5650"
}

Petrović, M., Rakonjac, S., Bogdanović, V., Bogosavljević-Bošković, S., Djoković, R., Dosković, V.,& Petrović, M.. (2018). Phenotypic Exposure and Variability of Livestocks Lifetime Production of Milk and Dairy Fats. in 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018..
https://hdl.handle.net/21.15107/rcub_agrospace_5650

Petrović M, Rakonjac S, Bogdanović V, Bogosavljević-Bošković S, Djoković R, Dosković V, Petrović M. Phenotypic Exposure and Variability of Livestocks Lifetime Production of Milk and Dairy Fats. in 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018.. 2018;.
https://hdl.handle.net/21.15107/rcub_agrospace_5650 .

Petrović, Milun, Rakonjac, Simeon, Bogdanović, Vladan, Bogosavljević-Bošković, Snežana, Djoković, Radojica, Dosković, Vladimir, Petrović, Miloš, "Phenotypic Exposure and Variability of Livestocks Lifetime Production of Milk and Dairy Fats" in 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018. (2018),
https://hdl.handle.net/21.15107/rcub_agrospace_5650 .

TY  - CONF
AU  - Bogdanović, Vladan
AU  - Bogosavljević-Bošković, Snežana
AU  - Petrović, Milun
AU  - Rakonjac, Simeon
AU  - Djoković, Radojica
AU  - Dosković, Vladimir
AU  - Petrović, Miloš
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5652
AB  - Behavior, welfare and protection of cattle are an integral part of organic livestock breeding. Organic production considers animals being cultivated in accordance with their basic needs, supporting most of their normal forms of behavior (inborn and acquired), while respecting the basic principles of well-being and protection. Organic as an alternative to conventional production respects the importance of behavior, welfare and protection of animals and is therefore  in line with natural animals needs.
Being familiar and understanding the behavior of animals is of multiple importance for successful breeding of cattle regardless to applied production system (intensive, extensive or organic).
Animal welfare and protection is a complex biotechnological issue and contains an aspect of science (biology, veterinary medicine, agronomy)and aspects of ethics. The welfare implies the quality of life and harmonious relationship of animal with its environment; as such, it became present in conventional and unavoidable topic in organic production in livestock breeding.
AB  - Ponašanje, dobrobit i zaštita gajenih životinja predstavljaju integralni deo organskog stočarstva. U organskoj proizvodnji životinje se moraju uzgajati u skladu sa njihovim bazičnim potrebama, odnosno na način u kome će ispoljiti najveći deo njihovih normalnih oblika ponašanja (urođenih i stečenih) uz poštovanje osnovnih načela dobrobiti i zaštite. Uvažavajući značaj ponašanja, dobrobiti i zaštite životinja organska proizvodnja, kao alternativa konvencionalnoj, upravo je usklađena sa prirodnim potrebama životinja.
Poznavanje i razumevanje ponašanja životinja od višestrukog je značaja za uspešno gajenje domaćih životinja bez obzira o kom sistemu proizvodnje je reč (intenzivni, ekstenzivni ili organski). 
Dobrobit i zaštita životinja je jedno kompleksno biotehničko pitanje i u sebi sadrži kako aspekt nauke (biologije, veterine, agronomije), tako i aspekte etike. Dobrobit podrazumeva kvalitet života i harmoničan odnos životinje sa okruženjem te je kao takva postala aktuelna u konvencionalnoj i nezaobilazna tema u organskoj proizvodnji u stočarstvu.
C3  - 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018.
T1  - Behavior, Animal Welfare and Safety in Organic Livestock
T1  - Ponašanje, dobrobit i zaštita životinja u organskom stočarstvu
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5652
ER  - 

@conference{
author = "Bogdanović, Vladan and Bogosavljević-Bošković, Snežana and Petrović, Milun and Rakonjac, Simeon and Djoković, Radojica and Dosković, Vladimir and Petrović, Miloš",
year = "2018",
abstract = "Behavior, welfare and protection of cattle are an integral part of organic livestock breeding. Organic production considers animals being cultivated in accordance with their basic needs, supporting most of their normal forms of behavior (inborn and acquired), while respecting the basic principles of well-being and protection. Organic as an alternative to conventional production respects the importance of behavior, welfare and protection of animals and is therefore  in line with natural animals needs.
Being familiar and understanding the behavior of animals is of multiple importance for successful breeding of cattle regardless to applied production system (intensive, extensive or organic).
Animal welfare and protection is a complex biotechnological issue and contains an aspect of science (biology, veterinary medicine, agronomy)and aspects of ethics. The welfare implies the quality of life and harmonious relationship of animal with its environment; as such, it became present in conventional and unavoidable topic in organic production in livestock breeding., Ponašanje, dobrobit i zaštita gajenih životinja predstavljaju integralni deo organskog stočarstva. U organskoj proizvodnji životinje se moraju uzgajati u skladu sa njihovim bazičnim potrebama, odnosno na način u kome će ispoljiti najveći deo njihovih normalnih oblika ponašanja (urođenih i stečenih) uz poštovanje osnovnih načela dobrobiti i zaštite. Uvažavajući značaj ponašanja, dobrobiti i zaštite životinja organska proizvodnja, kao alternativa konvencionalnoj, upravo je usklađena sa prirodnim potrebama životinja.
Poznavanje i razumevanje ponašanja životinja od višestrukog je značaja za uspešno gajenje domaćih životinja bez obzira o kom sistemu proizvodnje je reč (intenzivni, ekstenzivni ili organski). 
Dobrobit i zaštita životinja je jedno kompleksno biotehničko pitanje i u sebi sadrži kako aspekt nauke (biologije, veterine, agronomije), tako i aspekte etike. Dobrobit podrazumeva kvalitet života i harmoničan odnos životinje sa okruženjem te je kao takva postala aktuelna u konvencionalnoj i nezaobilazna tema u organskoj proizvodnji u stočarstvu.",
journal = "23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018.",
title = "Behavior, Animal Welfare and Safety in Organic Livestock, Ponašanje, dobrobit i zaštita životinja u organskom stočarstvu",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5652"
}

Bogdanović, V., Bogosavljević-Bošković, S., Petrović, M., Rakonjac, S., Djoković, R., Dosković, V.,& Petrović, M.. (2018). Behavior, Animal Welfare and Safety in Organic Livestock. in 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018..
https://hdl.handle.net/21.15107/rcub_agrospace_5652

Bogdanović V, Bogosavljević-Bošković S, Petrović M, Rakonjac S, Djoković R, Dosković V, Petrović M. Behavior, Animal Welfare and Safety in Organic Livestock. in 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018.. 2018;.
https://hdl.handle.net/21.15107/rcub_agrospace_5652 .

Bogdanović, Vladan, Bogosavljević-Bošković, Snežana, Petrović, Milun, Rakonjac, Simeon, Djoković, Radojica, Dosković, Vladimir, Petrović, Miloš, "Behavior, Animal Welfare and Safety in Organic Livestock" in 23. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 09.-10. 03. 2018. (2018),
https://hdl.handle.net/21.15107/rcub_agrospace_5652 .

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  - Petrović, Milun D.
AU  - Bogdanović, Vladan
AU  - Bogosavljević-Bošković, Snežana
AU  - Djoković, Radojica
AU  - Rakonjac, Simeon
AU  - Petrović, Miloš Ž.
AU  - Dosković, Vladimir
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4564
AB  - The effect of systematic and continuous environmental factors on 4% fat corrected milk (FCM) yield in 2805 Simmental cows over whole and standard lactations was evaluated using the general linear model. The test systematic or fixed factors included the effect of farm or breeding area, calving season, year of birth, season of birth, lactation group and interactions between year of birth and season of birth, breeding area and calving season, and breeding area and lactation group. The continuous factor analysed was the effect of age at first conception. The effect of breeding area, lactation group and calving season on 4%FCM yield over whole and standard lactations was found to be very highly significant (P lt 0.001). The interactions of fixed i.e. systematic factors involved in the model, including those between year and season of birth, breeding area and calving season, and farm and lactation group had a very highly significant effect (P lt 0.001) on 4% FCM yield over both whole and standard lactations. The age at first conception, as a continuous factor, showed a very highly significant effect (P lt 0.001) on 4% FCM yield over both whole and standard lactations. The model used to correct the 4%FCM yield over whole and standard lactations for the effect of systematic factors was very highly significant (P lt 0.001). The variance of the model accounted for 15.93% and 21.55% of the total variance in 4% FCM yield over whole and standard lactations, respectively. The resulting coefficient of determination (R2) in 4% FCM yield was 0.159 over whole lactations and 0.216 over standard lactations.
AB  - Analiza uticaja sistematskih i kontinuelnih faktora okoline na proizvodnju 4% mast-korigovanog mleka u celim i standardnim laktacijama kod 2805 krava simentalske rase izvršena je primenom opšteg linearnog modela. Od sistematskih odnosno fiksnih faktora analiziran je uticaj farme ili odgajivačkog područja, sezone telenja, godine i sezone rođenja, grupe laktacija i interakcije između godine i sezone rođenja, odgajivačkog područja i sezone telenja i odgajivačkog područja i grupe laktacija. Od kontinuelnih faktora posmatran je uticaj uzrasta pri prvoj oplodnji. Uticaj odgajivačkog područja, grupe laktacija i sezone telenja na proizvodnju 4%MKM u celim i standardnim laktacijama bila je vrlo visoko značajna (P lt 0.001). Interakcije fiksnih, odnosno sistematskih faktora, uključenih u model, kao što su interakcija između godine i sezone rođenja, zatim odgajivačkog područja i sezone telenja i farme i grupe laktacija, na proizvodnju 4%MKM kako u celim tako i u standardnim laktacijama imale su vrlo visoko značajan uticaj (P lt 0.001). Uzrast pri prvoj oplodnji, kao kontinuelni faktor, statistički vrlo visoko značajno (P lt 0.001) je uticao na proizvodnju 4% mast-korigovanog mleka i u celim i u standardnim laktacijama. Primenjeni model za korekciju proizvodnje 4%MKM u celim i standardnim laktacijama na dejstvo sistematskih faktora bio je vrlo visoko značajan (P lt 0.001). Udeo varijanse modela u ukupnoj varijansi kretao se od 15.93% kod proizvodnje 4%MKM u celim laktacijama do 21.55% kod proizvodnje 4%MKM u standardnim laktacijama. Dobijeni koeficijenti determinacije (R2) kod proizvodnje 4%MKM u celim i standardnim laktacijama iznosili su 0.159 i 0.216.
PB  - Univerzitet u Kragujevcu - Agronomski fakultet, Čačak
T2  - Acta agriculturae Serbica
T1  - The effect of systematic factors on 4% fat-corrected milk yield in Simmental cows
T1  - Uticaj sistematskih faktora na proizvodnju 4% mast korigovanog mleka kod krava simentalske rase
EP  - 35
IS  - 43
SP  - 23
VL  - 22
DO  - 10.5937/AASer1743023P
ER  - 

@article{
author = "Petrović, Milun D. and Bogdanović, Vladan and Bogosavljević-Bošković, Snežana and Djoković, Radojica and Rakonjac, Simeon and Petrović, Miloš Ž. and Dosković, Vladimir",
year = "2017",
abstract = "The effect of systematic and continuous environmental factors on 4% fat corrected milk (FCM) yield in 2805 Simmental cows over whole and standard lactations was evaluated using the general linear model. The test systematic or fixed factors included the effect of farm or breeding area, calving season, year of birth, season of birth, lactation group and interactions between year of birth and season of birth, breeding area and calving season, and breeding area and lactation group. The continuous factor analysed was the effect of age at first conception. The effect of breeding area, lactation group and calving season on 4%FCM yield over whole and standard lactations was found to be very highly significant (P lt 0.001). The interactions of fixed i.e. systematic factors involved in the model, including those between year and season of birth, breeding area and calving season, and farm and lactation group had a very highly significant effect (P lt 0.001) on 4% FCM yield over both whole and standard lactations. The age at first conception, as a continuous factor, showed a very highly significant effect (P lt 0.001) on 4% FCM yield over both whole and standard lactations. The model used to correct the 4%FCM yield over whole and standard lactations for the effect of systematic factors was very highly significant (P lt 0.001). The variance of the model accounted for 15.93% and 21.55% of the total variance in 4% FCM yield over whole and standard lactations, respectively. The resulting coefficient of determination (R2) in 4% FCM yield was 0.159 over whole lactations and 0.216 over standard lactations., Analiza uticaja sistematskih i kontinuelnih faktora okoline na proizvodnju 4% mast-korigovanog mleka u celim i standardnim laktacijama kod 2805 krava simentalske rase izvršena je primenom opšteg linearnog modela. Od sistematskih odnosno fiksnih faktora analiziran je uticaj farme ili odgajivačkog područja, sezone telenja, godine i sezone rođenja, grupe laktacija i interakcije između godine i sezone rođenja, odgajivačkog područja i sezone telenja i odgajivačkog područja i grupe laktacija. Od kontinuelnih faktora posmatran je uticaj uzrasta pri prvoj oplodnji. Uticaj odgajivačkog područja, grupe laktacija i sezone telenja na proizvodnju 4%MKM u celim i standardnim laktacijama bila je vrlo visoko značajna (P lt 0.001). Interakcije fiksnih, odnosno sistematskih faktora, uključenih u model, kao što su interakcija između godine i sezone rođenja, zatim odgajivačkog područja i sezone telenja i farme i grupe laktacija, na proizvodnju 4%MKM kako u celim tako i u standardnim laktacijama imale su vrlo visoko značajan uticaj (P lt 0.001). Uzrast pri prvoj oplodnji, kao kontinuelni faktor, statistički vrlo visoko značajno (P lt 0.001) je uticao na proizvodnju 4% mast-korigovanog mleka i u celim i u standardnim laktacijama. Primenjeni model za korekciju proizvodnje 4%MKM u celim i standardnim laktacijama na dejstvo sistematskih faktora bio je vrlo visoko značajan (P lt 0.001). Udeo varijanse modela u ukupnoj varijansi kretao se od 15.93% kod proizvodnje 4%MKM u celim laktacijama do 21.55% kod proizvodnje 4%MKM u standardnim laktacijama. Dobijeni koeficijenti determinacije (R2) kod proizvodnje 4%MKM u celim i standardnim laktacijama iznosili su 0.159 i 0.216.",
publisher = "Univerzitet u Kragujevcu - Agronomski fakultet, Čačak",
journal = "Acta agriculturae Serbica",
title = "The effect of systematic factors on 4% fat-corrected milk yield in Simmental cows, Uticaj sistematskih faktora na proizvodnju 4% mast korigovanog mleka kod krava simentalske rase",
pages = "35-23",
number = "43",
volume = "22",
doi = "10.5937/AASer1743023P"
}

Petrović, M. D., Bogdanović, V., Bogosavljević-Bošković, S., Djoković, R., Rakonjac, S., Petrović, M. Ž.,& Dosković, V.. (2017). The effect of systematic factors on 4% fat-corrected milk yield in Simmental cows. in Acta agriculturae Serbica
Univerzitet u Kragujevcu - Agronomski fakultet, Čačak., 22(43), 23-35.
https://doi.org/10.5937/AASer1743023P

Petrović MD, Bogdanović V, Bogosavljević-Bošković S, Djoković R, Rakonjac S, Petrović MŽ, Dosković V. The effect of systematic factors on 4% fat-corrected milk yield in Simmental cows. in Acta agriculturae Serbica. 2017;22(43):23-35.
doi:10.5937/AASer1743023P .

Petrović, Milun D., Bogdanović, Vladan, Bogosavljević-Bošković, Snežana, Djoković, Radojica, Rakonjac, Simeon, Petrović, Miloš Ž., Dosković, Vladimir, "The effect of systematic factors on 4% fat-corrected milk yield in Simmental cows" in Acta agriculturae Serbica, 22, no. 43 (2017):23-35,
https://doi.org/10.5937/AASer1743023P . .

TY  - CONF
AU  - Petrović, Milun
AU  - Bogdanović, Vladan
AU  - Djedović, Radica
AU  - Bogosavljević-Bošković, Snežana
AU  - Rakonjac, Simeon
AU  - Djoković, Radojica
AU  - Petrović, Miloš
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5634
AB  - In scientific literature, fertility is generally assessed through age at first conception, gestation length, length of service period, calving interval, and calf birth weight.
Determination of the effect of particular non-genetic factors on the above traits is a vital step in cattle breeding and reproduction. 
Length of calving interval is largely governed by the effect of non-genetic factors, viz. fixed effects generally including the effect of breeding region, season of birth, calving season, year of birth, calf sex and their interactions, and continuous or regression effects including age at first conception or age at calving. 
The effect of fixed and continuous non-genetic factors on length of calving period was analysed in 245 Simmental cows (907 calving interval) in three breeding regions, with the effect of season of birth as a fixed factor and cow age at first conception as a continuous factor being highly significant (P  lt  0.01), and that of season of calving being significant (P  lt  0.05). The effect of breeding region, year of birth, parity group or age and calf sex was statistically non-significant (P > 0.05).
AB  - U literaturi plodnost se najčešće posmatra preko uzrasta pri prvoj oplodnji, trajanja bremenitosti, servis perioda, intervala između telenja i mase teladi pri rođenju. 
Determinisanje uticaja pojedinih sistematskih faktora na pomenute osobine od velike je važnosti u procesu odgajivanja i reprodukcije goveda.
Dužina intervala između telenja definisana je najvećim delom dejstvom paragenetskih faktora, od kojih kao fiksni uticaji najčešće se pominju uticaj odgajivačkog područja, sezone rođenja i telenja, godine rođenja, pola teladi i njihove interakcije, a od kontinuelnih ili regresijskih uzrast krava pri prvoj oplodnji ili telenju.
Analiza uticaja fiksnih i kontinuiranih negenetskih faktora na dužinu odnosno trajanje intervala između telenja izvršena je kod 245 krava (907 međutelidbenih intervala) simentalske rase raspoređenih na tri odgajivačka područja pri čemu je uticaj sezone rođenja kao fiksnog i uzrasta krava pri prvoj oplodnji kao kontinuiranog faktora bio visoko značajan (P lt 0.01) dok je uticaj sezone telenja na dužinu međutelidbenog intervala bio značajan.(P lt 0.05). Uticaj  odgajivačkog područja, godine rođenja, grupe partusa odnosno starosti kao i pola teladi nije bio statistički značajan (P>0.05).
C3  - 22. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 10.-11. 03. 2017.
T1  - Effect of Paragenetic Factors on the Intensity of Fertility in Simmental Cows
T1  - Uticaj paragenetskih faktora na intenzitet plodnosti kod krava simentalske rase
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5634
ER  - 

@conference{
author = "Petrović, Milun and Bogdanović, Vladan and Djedović, Radica and Bogosavljević-Bošković, Snežana and Rakonjac, Simeon and Djoković, Radojica and Petrović, Miloš",
year = "2017",
abstract = "In scientific literature, fertility is generally assessed through age at first conception, gestation length, length of service period, calving interval, and calf birth weight.
Determination of the effect of particular non-genetic factors on the above traits is a vital step in cattle breeding and reproduction. 
Length of calving interval is largely governed by the effect of non-genetic factors, viz. fixed effects generally including the effect of breeding region, season of birth, calving season, year of birth, calf sex and their interactions, and continuous or regression effects including age at first conception or age at calving. 
The effect of fixed and continuous non-genetic factors on length of calving period was analysed in 245 Simmental cows (907 calving interval) in three breeding regions, with the effect of season of birth as a fixed factor and cow age at first conception as a continuous factor being highly significant (P  lt  0.01), and that of season of calving being significant (P  lt  0.05). The effect of breeding region, year of birth, parity group or age and calf sex was statistically non-significant (P > 0.05)., U literaturi plodnost se najčešće posmatra preko uzrasta pri prvoj oplodnji, trajanja bremenitosti, servis perioda, intervala između telenja i mase teladi pri rođenju. 
Determinisanje uticaja pojedinih sistematskih faktora na pomenute osobine od velike je važnosti u procesu odgajivanja i reprodukcije goveda.
Dužina intervala između telenja definisana je najvećim delom dejstvom paragenetskih faktora, od kojih kao fiksni uticaji najčešće se pominju uticaj odgajivačkog područja, sezone rođenja i telenja, godine rođenja, pola teladi i njihove interakcije, a od kontinuelnih ili regresijskih uzrast krava pri prvoj oplodnji ili telenju.
Analiza uticaja fiksnih i kontinuiranih negenetskih faktora na dužinu odnosno trajanje intervala između telenja izvršena je kod 245 krava (907 međutelidbenih intervala) simentalske rase raspoređenih na tri odgajivačka područja pri čemu je uticaj sezone rođenja kao fiksnog i uzrasta krava pri prvoj oplodnji kao kontinuiranog faktora bio visoko značajan (P lt 0.01) dok je uticaj sezone telenja na dužinu međutelidbenog intervala bio značajan.(P lt 0.05). Uticaj  odgajivačkog područja, godine rođenja, grupe partusa odnosno starosti kao i pola teladi nije bio statistički značajan (P>0.05).",
journal = "22. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 10.-11. 03. 2017.",
title = "Effect of Paragenetic Factors on the Intensity of Fertility in Simmental Cows, Uticaj paragenetskih faktora na intenzitet plodnosti kod krava simentalske rase",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5634"
}

Petrović, M., Bogdanović, V., Djedović, R., Bogosavljević-Bošković, S., Rakonjac, S., Djoković, R.,& Petrović, M.. (2017). Effect of Paragenetic Factors on the Intensity of Fertility in Simmental Cows. in 22. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 10.-11. 03. 2017..
https://hdl.handle.net/21.15107/rcub_agrospace_5634

Petrović M, Bogdanović V, Djedović R, Bogosavljević-Bošković S, Rakonjac S, Djoković R, Petrović M. Effect of Paragenetic Factors on the Intensity of Fertility in Simmental Cows. in 22. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 10.-11. 03. 2017.. 2017;.
https://hdl.handle.net/21.15107/rcub_agrospace_5634 .

Petrović, Milun, Bogdanović, Vladan, Djedović, Radica, Bogosavljević-Bošković, Snežana, Rakonjac, Simeon, Djoković, Radojica, Petrović, Miloš, "Effect of Paragenetic Factors on the Intensity of Fertility in Simmental Cows" in 22. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 10.-11. 03. 2017. (2017),
https://hdl.handle.net/21.15107/rcub_agrospace_5634 .

TY  - JOUR
AU  - Čobanović, Ksenija
AU  - Kučević, Denis
AU  - Plavsić, Miroslav
AU  - Bogdanović, Vladan
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4482
AB  - The purpose of this study was to examine possible relationship between milk urea and fertility of dairy cows using field data. This study also evaluated the influence of environmental factors on milk urea (MU) and the relationship between MU and daily milk yield, milk fat and protein percentage. The data were collected at 11 dairy farms in the Vojvodina region. Reproductive data and MU measurements were obtained from cows that calved between June 2013 and October 2015 and had a successful conception after calving. Statistical data processing was carried out by applying General Linear Model procedure, Statistics 13. Parity, calving season, season of milk control and farm were included in the models as fixed effects. Significant differences in MU concentrations were observed between farms (P lt 0.01), seasons (P lt 0.01) and parity (P lt 0.05). Highly significant (P lt 0.01) positive relationships were found between MU concentration and milk yield, fat and protein percentage and days open. Cows with MU levels below 10 mg dL(-1) had the lowest day open interval (135.59 days) and cows with MU higher than 35 mg dL(-1) had the longest days open interval (163.18 days). The cows with the lowest mean MU values ( lt 10 mg dL(-1)), had the shortest days open interval (72.62 days), but cows with mean MU values between 20.01-25.00 mg dL(-1) had the longest days open interval (161.78 days). Results of this study indicate that increased MU levels appear to have a negative effect on dairy cow fertility.
PB  - Croatian Dairy Union, Zagreb
T2  - Mljekarstvo
T1  - Impact of non nutritional factors on milk urea concentration and its relationship with production and fertility traits in Vojvodina dairy herds
EP  - 276
IS  - 4
SP  - 267
VL  - 67
DO  - 10.15567/mljekarstvo.2017.0404
ER  - 

@article{
author = "Čobanović, Ksenija and Kučević, Denis and Plavsić, Miroslav and Bogdanović, Vladan",
year = "2017",
abstract = "The purpose of this study was to examine possible relationship between milk urea and fertility of dairy cows using field data. This study also evaluated the influence of environmental factors on milk urea (MU) and the relationship between MU and daily milk yield, milk fat and protein percentage. The data were collected at 11 dairy farms in the Vojvodina region. Reproductive data and MU measurements were obtained from cows that calved between June 2013 and October 2015 and had a successful conception after calving. Statistical data processing was carried out by applying General Linear Model procedure, Statistics 13. Parity, calving season, season of milk control and farm were included in the models as fixed effects. Significant differences in MU concentrations were observed between farms (P lt 0.01), seasons (P lt 0.01) and parity (P lt 0.05). Highly significant (P lt 0.01) positive relationships were found between MU concentration and milk yield, fat and protein percentage and days open. Cows with MU levels below 10 mg dL(-1) had the lowest day open interval (135.59 days) and cows with MU higher than 35 mg dL(-1) had the longest days open interval (163.18 days). The cows with the lowest mean MU values ( lt 10 mg dL(-1)), had the shortest days open interval (72.62 days), but cows with mean MU values between 20.01-25.00 mg dL(-1) had the longest days open interval (161.78 days). Results of this study indicate that increased MU levels appear to have a negative effect on dairy cow fertility.",
publisher = "Croatian Dairy Union, Zagreb",
journal = "Mljekarstvo",
title = "Impact of non nutritional factors on milk urea concentration and its relationship with production and fertility traits in Vojvodina dairy herds",
pages = "276-267",
number = "4",
volume = "67",
doi = "10.15567/mljekarstvo.2017.0404"
}

Čobanović, K., Kučević, D., Plavsić, M.,& Bogdanović, V.. (2017). Impact of non nutritional factors on milk urea concentration and its relationship with production and fertility traits in Vojvodina dairy herds. in Mljekarstvo
Croatian Dairy Union, Zagreb., 67(4), 267-276.
https://doi.org/10.15567/mljekarstvo.2017.0404

Čobanović K, Kučević D, Plavsić M, Bogdanović V. Impact of non nutritional factors on milk urea concentration and its relationship with production and fertility traits in Vojvodina dairy herds. in Mljekarstvo. 2017;67(4):267-276.
doi:10.15567/mljekarstvo.2017.0404 .

Čobanović, Ksenija, Kučević, Denis, Plavsić, Miroslav, Bogdanović, Vladan, "Impact of non nutritional factors on milk urea concentration and its relationship with production and fertility traits in Vojvodina dairy herds" in Mljekarstvo, 67, no. 4 (2017):267-276,
https://doi.org/10.15567/mljekarstvo.2017.0404 . .

TY  - CONF
AU  - Petrović, Milun
AU  - Bogdanović, Vladan
AU  - Bogosavljević-Bošković, Snežana
AU  - Rakonjac, Simeon
AU  - Djoković, Radojica
AU  - Petrović, Miloš
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5614
AB  - The effect of paragenetic factors on 4% FCM yield in complete and standard lactations was studied in 241 Simmental cows.
Farm, lactation number, birth season, calving season, their interactions and age at first conception were evaluated for their effect on the trait. 
The mathematical and statistical analysis of the data obtained, i.e. least square means, standard error, analysis of variance and coefficient determination, were calculated using the General Linear Model procedure. The effects of farm, lactation group and year of birth on the trait were very highly significant (P lt 0.001). Birth season and calving season had no statistically significant effect (P> 0.05) on the production of 4% FCM, either in whole or in standard lactations. The interaction between birth season, calving season and year of birth was variable and ranged from insignificant to very significant.
Age at first conception produced a significant (P lt 0.05) and non-significant (P>0.05) effect on 4% FCM yield in complete and standard (bxy=0.693ns) lactations, respectively.
AB  - Uticaj paragenetskih faktora na proizvodnju 4%MKM u celim i standardnim laktacijama ispitivan je na uzorku od 241 krave simentalske rase.
Na ispoljenost ove osobine ispitivan je uticaj farme, broja laktacija, sezone rođenja i telenja, njihovih interakcija i uzrasta pri prvoj oplodnji.
Matematičko-statistička analiza podataka, odnosno sve potrebne veličine, kao što su sredine najmanjih kvadrata, standardne greške, analiza varijanse i koeficijenti determinacije izračunate su u programskoj proceduri Opšti linearni model (GLM procedura). Uticaj farme, grupe laktacija i godine rođenja na ispoljenost ove osobine bio je vrlo visoko značajan (P lt 0.001). Sezona rođenja i telenja nije statistički značajno uticala (P>0.05) na proizvodnju 4%MKM kako u celim tako i standardnim laktacijama. Uticaj interakcije između sezone rođenja,, sezone telenja i godine rođenja bio je varjabilan, i kretao se od nesignifikantnog do vrlo značajnog. Uzrast pri prvoj oplodnji statistički značajno (P lt 0.05) je uticao na proizvodnju 4%MKM u celim laktacijama, dok njegov uticaj na proizvodnju 4%MKM u standardnim laktacijama nije bio signifikantan (P>0.05). Koeficijenta determinacije (R2) bio je vrlo visoko značajan (p lt 0.001) i kretao se od  0.623 kod proizvodnje 4%MKM u celim do 0.652 kod proizvodnje 4%MKM u standardnim laktacijama.
C3  - 21. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 11.- 12. 03. 2016.
T1  - Influence of Fixed and Continuous Environmental Factors on Production 4% Fat-Corrected Milk in the First Three Lactations in Simmental Cows
T1  - Uticaj fiksnih i kontinuelnih ambijentalnih faktora na proizvodnju 4% mast-korigovanog mleka u prve tri laktacije kod krava simentalske rase
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5614
ER  - 

@conference{
author = "Petrović, Milun and Bogdanović, Vladan and Bogosavljević-Bošković, Snežana and Rakonjac, Simeon and Djoković, Radojica and Petrović, Miloš",
year = "2016",
abstract = "The effect of paragenetic factors on 4% FCM yield in complete and standard lactations was studied in 241 Simmental cows.
Farm, lactation number, birth season, calving season, their interactions and age at first conception were evaluated for their effect on the trait. 
The mathematical and statistical analysis of the data obtained, i.e. least square means, standard error, analysis of variance and coefficient determination, were calculated using the General Linear Model procedure. The effects of farm, lactation group and year of birth on the trait were very highly significant (P lt 0.001). Birth season and calving season had no statistically significant effect (P> 0.05) on the production of 4% FCM, either in whole or in standard lactations. The interaction between birth season, calving season and year of birth was variable and ranged from insignificant to very significant.
Age at first conception produced a significant (P lt 0.05) and non-significant (P>0.05) effect on 4% FCM yield in complete and standard (bxy=0.693ns) lactations, respectively., Uticaj paragenetskih faktora na proizvodnju 4%MKM u celim i standardnim laktacijama ispitivan je na uzorku od 241 krave simentalske rase.
Na ispoljenost ove osobine ispitivan je uticaj farme, broja laktacija, sezone rođenja i telenja, njihovih interakcija i uzrasta pri prvoj oplodnji.
Matematičko-statistička analiza podataka, odnosno sve potrebne veličine, kao što su sredine najmanjih kvadrata, standardne greške, analiza varijanse i koeficijenti determinacije izračunate su u programskoj proceduri Opšti linearni model (GLM procedura). Uticaj farme, grupe laktacija i godine rođenja na ispoljenost ove osobine bio je vrlo visoko značajan (P lt 0.001). Sezona rođenja i telenja nije statistički značajno uticala (P>0.05) na proizvodnju 4%MKM kako u celim tako i standardnim laktacijama. Uticaj interakcije između sezone rođenja,, sezone telenja i godine rođenja bio je varjabilan, i kretao se od nesignifikantnog do vrlo značajnog. Uzrast pri prvoj oplodnji statistički značajno (P lt 0.05) je uticao na proizvodnju 4%MKM u celim laktacijama, dok njegov uticaj na proizvodnju 4%MKM u standardnim laktacijama nije bio signifikantan (P>0.05). Koeficijenta determinacije (R2) bio je vrlo visoko značajan (p lt 0.001) i kretao se od  0.623 kod proizvodnje 4%MKM u celim do 0.652 kod proizvodnje 4%MKM u standardnim laktacijama.",
journal = "21. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 11.- 12. 03. 2016.",
title = "Influence of Fixed and Continuous Environmental Factors on Production 4% Fat-Corrected Milk in the First Three Lactations in Simmental Cows, Uticaj fiksnih i kontinuelnih ambijentalnih faktora na proizvodnju 4% mast-korigovanog mleka u prve tri laktacije kod krava simentalske rase",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5614"
}

Petrović, M., Bogdanović, V., Bogosavljević-Bošković, S., Rakonjac, S., Djoković, R.,& Petrović, M.. (2016). Influence of Fixed and Continuous Environmental Factors on Production 4% Fat-Corrected Milk in the First Three Lactations in Simmental Cows. in 21. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 11.- 12. 03. 2016..
https://hdl.handle.net/21.15107/rcub_agrospace_5614

Petrović M, Bogdanović V, Bogosavljević-Bošković S, Rakonjac S, Djoković R, Petrović M. Influence of Fixed and Continuous Environmental Factors on Production 4% Fat-Corrected Milk in the First Three Lactations in Simmental Cows. in 21. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 11.- 12. 03. 2016.. 2016;.
https://hdl.handle.net/21.15107/rcub_agrospace_5614 .

Petrović, Milun, Bogdanović, Vladan, Bogosavljević-Bošković, Snežana, Rakonjac, Simeon, Djoković, Radojica, Petrović, Miloš, "Influence of Fixed and Continuous Environmental Factors on Production 4% Fat-Corrected Milk in the First Three Lactations in Simmental Cows" in 21. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 11.- 12. 03. 2016. (2016),
https://hdl.handle.net/21.15107/rcub_agrospace_5614 .

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

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

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

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

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

TY  - CONF
AU  - Bogdanović, Vladan
AU  - Bogosavljević-Bošković, Snežana
AU  - Rakonjac, Simeon
AU  - Djoković, Radojica
AU  - Dosković, Vladimir
AU  - Petrović, Milun
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5588
AB  - This study was conducted to evaluate the phenotypic expression and variability of lifetime performance traits (lifetime yields of milk, fat and 4%FCM, milk fat content, milk yield per milking day, milk yield per day of productive life and milk yield per day of life) and the effect of systematic factors (breeding region, total lactation number, year of birth and season of birth) and age at first conception on the above traits in 2548 Simmental cows. The test Simmental cows achieved the following: lifetime yields of milk, fat and 4%FCM - 14604, 554.8 and 14157 kg, respectively, milk fat content of lifetime milk yield - 3.81%, milk yield per milking day - 12.79, milk yield per day of productive life - 9.31 and milk yield per day of life - 5.46 kg. The marked variability of the traits, along with a certain percent of high-producing cows, enables further success in their selection.
AB  - Ispitivanje fenotipske ispoljenosti i varijabilnosti osobina životne proizvodnje (životna proizvodnja mleka, mlečne masti i 4%MKM, sadržaj mlečne masti kao i proizvodnja mleka po muznom produktivnom i životnom danu) izvršeno je na uzorku od 2548 krava simentalske rase. Na analiziranom uzorku simentalskih krava ostvarena životna proizvodnja mleka, mlečne masti i 4%MKM iznosila je 14604, 554.8 i 14157 kg, sadržaj mlečne masti životne proizvodnje mleka 3.81%, dok je proizvodnja mleka po muznom, produktivnom i životnom danu iznosila 12.79, 9.31 i 5.46 kg. Izražena varijabilnost ovih osobina, sa izvesnim procentom visoko proizvodnih grla, omogućava dalji uspešan rad u njihovoj selekciji.
C3  - 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015.
T1  - Lifetime Production Milk and Milk Fat in Simmental Cows
T1  - Životna proizvodnja mleka i mlečne masti kod krava simentalske rase
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5588
ER  - 

@conference{
author = "Bogdanović, Vladan and Bogosavljević-Bošković, Snežana and Rakonjac, Simeon and Djoković, Radojica and Dosković, Vladimir and Petrović, Milun",
year = "2015",
abstract = "This study was conducted to evaluate the phenotypic expression and variability of lifetime performance traits (lifetime yields of milk, fat and 4%FCM, milk fat content, milk yield per milking day, milk yield per day of productive life and milk yield per day of life) and the effect of systematic factors (breeding region, total lactation number, year of birth and season of birth) and age at first conception on the above traits in 2548 Simmental cows. The test Simmental cows achieved the following: lifetime yields of milk, fat and 4%FCM - 14604, 554.8 and 14157 kg, respectively, milk fat content of lifetime milk yield - 3.81%, milk yield per milking day - 12.79, milk yield per day of productive life - 9.31 and milk yield per day of life - 5.46 kg. The marked variability of the traits, along with a certain percent of high-producing cows, enables further success in their selection., Ispitivanje fenotipske ispoljenosti i varijabilnosti osobina životne proizvodnje (životna proizvodnja mleka, mlečne masti i 4%MKM, sadržaj mlečne masti kao i proizvodnja mleka po muznom produktivnom i životnom danu) izvršeno je na uzorku od 2548 krava simentalske rase. Na analiziranom uzorku simentalskih krava ostvarena životna proizvodnja mleka, mlečne masti i 4%MKM iznosila je 14604, 554.8 i 14157 kg, sadržaj mlečne masti životne proizvodnje mleka 3.81%, dok je proizvodnja mleka po muznom, produktivnom i životnom danu iznosila 12.79, 9.31 i 5.46 kg. Izražena varijabilnost ovih osobina, sa izvesnim procentom visoko proizvodnih grla, omogućava dalji uspešan rad u njihovoj selekciji.",
journal = "20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015.",
title = "Lifetime Production Milk and Milk Fat in Simmental Cows, Životna proizvodnja mleka i mlečne masti kod krava simentalske rase",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5588"
}

Bogdanović, V., Bogosavljević-Bošković, S., Rakonjac, S., Djoković, R., Dosković, V.,& Petrović, M.. (2015). Lifetime Production Milk and Milk Fat in Simmental Cows. in 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015..
https://hdl.handle.net/21.15107/rcub_agrospace_5588

Bogdanović V, Bogosavljević-Bošković S, Rakonjac S, Djoković R, Dosković V, Petrović M. Lifetime Production Milk and Milk Fat in Simmental Cows. in 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015.. 2015;.
https://hdl.handle.net/21.15107/rcub_agrospace_5588 .

Bogdanović, Vladan, Bogosavljević-Bošković, Snežana, Rakonjac, Simeon, Djoković, Radojica, Dosković, Vladimir, Petrović, Milun, "Lifetime Production Milk and Milk Fat in Simmental Cows" in 20. Savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 13.- 14. 03. 2015. (2015),
https://hdl.handle.net/21.15107/rcub_agrospace_5588 .

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 . .