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

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

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

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

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

TY  - JOUR
AU  - 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 . .