Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
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 q...
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| Format: | Article |
| Language: | English |
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Croatian Dairy Union
2020-01-01
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| Series: | Mljekarstvo |
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| Online Access: | https://hrcak.srce.hr/file/342828 |
| _version_ | 1827282481998462976 |
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| author | Mladen Popovac Aleksandar Miletić Nikola Raguž Radmila Beskorovajni Dragan Stanojević Mihailo Radivojević Nenad Mićić Nenad Đurić |
| author_facet | Mladen Popovac Aleksandar Miletić Nikola Raguž Radmila Beskorovajni Dragan Stanojević Mihailo Radivojević Nenad Mićić Nenad Đurić |
| author_sort | Mladen Popovac |
| collection | DOAJ |
| description | 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<0.01, P<0.05, P<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<0.01, P<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<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 h2= 0.25; MM h2= 0.40; PR h2= 0.37. Coefficients determined for genetic and phenotypic correlations indicated existence of complete and positive correlations between these traits the interval of values being from rg = 0.96 between ML and MM to rg = 1.00 between ML and PR.
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| first_indexed | 2024-04-24T09:20:03Z |
| format | Article |
| id | doaj.art-23b1b6770f5e46a19ba52c2e7272ea71 |
| institution | Directory Open Access Journal |
| issn | 0026-704X 1846-4025 |
| language | English |
| last_indexed | 2024-04-24T09:20:03Z |
| publishDate | 2020-01-01 |
| publisher | Croatian Dairy Union |
| record_format | Article |
| series | Mljekarstvo |
| spelling | doaj.art-23b1b6770f5e46a19ba52c2e7272ea712024-04-15T16:06:28ZengCroatian Dairy UnionMljekarstvo0026-704X1846-40252020-01-017029310210.15567/mljekarstvo.2020.0203Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed Mladen Popovac0Aleksandar Miletić1Nikola Raguž2Radmila Beskorovajni3Dragan Stanojević4Mihailo Radivojević5Nenad Mićić6Nenad Đurić7University of Belgrade, Faculty of Agriculture, Nemanjina 6, 11080 Zemun, SerbiaIntitute PKB Agroeconomik, Industrijsko naselje bb, 11000 Belgrade, SerbiaJosip Juraj Strossmayer University of Osijek, Faculty of Agriculture, Kralja Petra Svačića 1d, 31000 Osijek, CroatiaInstitute for Science Application in Agriculture, Bulevar despota Stefana 68b, 11000 Belgrade, SerbiaUniversity of Belgrade, Faculty of Agriculture, Nemanjina 6, 11080 Zemun, SerbiaIntitute PKB Agroeconomik, Industrijsko naselje bb, 11000 Belgrade, SerbiaInstitute for Animal Husbandry Belgrade, Autoput 16, 11000 Belgrade, SerbiaJohn Naisbitt University, Faculty for Biopharming, Maršala Tita 39, 21400 Bačka Palanka, SerbiaThe 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<0.01, P<0.05, P<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<0.01, P<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<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 h2= 0.25; MM h2= 0.40; PR h2= 0.37. Coefficients determined for genetic and phenotypic correlations indicated existence of complete and positive correlations between these traits the interval of values being from rg = 0.96 between ML and MM to rg = 1.00 between ML and PR. https://hrcak.srce.hr/file/342828Holstein-Friesian first-calf heiferscow milk yield traitsanimal modelheritabilitygenetic correlations |
| spellingShingle | Mladen Popovac Aleksandar Miletić Nikola Raguž Radmila Beskorovajni Dragan Stanojević Mihailo Radivojević Nenad Mićić Nenad Đurić Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed Mljekarstvo Holstein-Friesian first-calf heifers cow milk yield traits animal model heritability genetic correlations |
| title | Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
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| title_full | Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
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| title_fullStr | Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
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| title_full_unstemmed | Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
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| title_short | Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
|
| title_sort | phenotypic and genetic parameters of milk yield traits in first calf heifers of holstein friesian breed |
| topic | Holstein-Friesian first-calf heifers cow milk yield traits animal model heritability genetic correlations |
| url | https://hrcak.srce.hr/file/342828 |
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