Improvement of ukrainian black and white dairy cattle under conditions of Ternopil oblast in the process of herds consolidation and forming of desirable dairy type of cows
Journal Title: Бюлетень "Ветеринарна біотехнологія" - Year 2017, Vol 31, Issue
Abstract
Introduction. The issue of improving Ukrainian black and white dairy cattle is relevant today. It could be solved by the development of the best practices for the preservation of the gene pool, improvement of the herd’s breeding efficiency and Ukrainian dairy breeds selection.The goal of the work. To analyze the results of cow’s linear evaluation by the type of body structure. To determine the level of herds phenotypic consolidation by main selection parameters. To identify areas of livestock quality improvement in the process of consolidation.Materials and methods. In this work, we used conventional zootechnical methods, and computer applications.Results of research and discussion. It was found that milk yield of the first-calf cow PLE “Ivanivs’ke” for 305 days of lactation was lower than their age mates from PATE "Dzvin" and LLC "Ukraine". This is due to the fact that their live weight was the lowest (438 kg), while the first-calf heifers were older (25.9 months).The linear evaluation of the first-calf cows in the herds showed that the cows have a pronounced breed type, a relatively harmonic type of body structure, well-formed udder.It was established that herd of PLE “Ivanivs’ke” is most consolidated by the discounted rates of traits in the breeding herd. Perhaps this is the result of years of deliberate selection. The herd of PATE "Dzvin" is less consolidated by both mean value and milk yield, body weight and age of first calving in particular.The firstborns of LLC "Ukraine" are the most consolidated by indices for milk production and milk fat content.Conclusions and prospects for further researches. It was found significant level of intergroup differentiation of cow’s breeding groups of different herds of Ukrainian black and white dairy cattle in Ternopil oblast by the degree of phenotypic consolidation. The degree of phenotypic consolidation by the set of quantitative and qualitative traits in studied herds is 0.222 - 0.254.To ensure qualitative improvement of herds, it is necessary to improve the cows' rations of feeding taking into account their productivity, especially during the days in milk and the second half of lactation.
Authors and Affiliations
Tatyana Yashchuk, B. Tikhonovа
Keywords
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- EP ID EP266571
- DOI 10.31073/vet_biotech31-18
- Views 135
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