Significance of breeding value indicators for prediction of milk yield
| Autor: | V. Shablia, O. Chaliy, T. Danilova, I. Zadorozhna, N. Krygina |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva. :19-25 |
| ISSN: | 2415-7635 2310-9289 |
| DOI: | 10.33245/2310-9289-2022-175-2-19-25 |
| Popis: | A comparative assessment of the significance of various indicators of the breeding value of breeding bulls for predicting milk yield in the highly productive herd of the farm economy "Alfa" was carried out. The milk yield of cows, whose bulls-fathers were evaluated in Ukraine and abroad, was studied. It was established that in the period from 2009 to 2014, the milk yield of first-calf heifers increased by 23.9 % and reached 5894.3 kg. Accordingly, during the specified period, most of the quantitative indicators of the breeding value and milk productivity of the bulls' daughters also increased: the breeding value of the parent bulls in terms of milk yield increased from +245.3 kg in 2009 to +540.4 kg in 2014; the breeding value of parent bulls in terms of the total amount of milk fat per lactation increased from +10.2 kg to +29.7 kg. A correlation analysis of the relationships between various indicators of breeding value of parent bulls and the milk yield of their daughters was carried out. It was established that the actual milk yield of first-calf heifers in FE "Alfa" most (correlation coefficients r higher than 0.8) and most significantly (p |
| Databáze: | OpenAIRE |
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