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Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed

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2020
5266.pdf (258.2Kb)
Authors
Popovac, Mladen
Miletić, Aleksandar
Raguz, Nikola
Beskorovajni, Radmila
Stanojević, Dragan
Radivojević, Mihailo
Micić, Nenad
Durić, Nenad
Article (Published version)
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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 f...arm 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.

Keywords:
Holstein-Friesian first-calf heifers / cow milk yield traits / animal model / heritability / genetic correlations
Source:
Mljekarstvo, 2020, 70, 2, 93-102
Publisher:
  • Croatian Dairy Union, Zagreb

DOI: 10.15567/mljekarstvo.2020.0203

ISSN: 0026-704X

WoS: 000542670300003

Scopus: 2-s2.0-85086718561
[ Google Scholar ]
URI
http://aspace.agrif.bg.ac.rs/handle/123456789/5269
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Poljoprivredni fakultet
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
UR  - conv_6880
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",
url = "conv_6880"
}
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
conv_6880
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
conv_6880 .
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 .,
conv_6880 .

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