Phenotypical changes in the pedigree herds of dairy cattle under the influence of genotypic and paratypic factors

I. Rudyk, V. Oleshko

Factors influencing high stud black variegated manner Ukrainian dairy breeds. The dependence of the level of milk production of cows herd genetic potential and environmental conditions. Size of genetic progress for mercy in the studied herd depends on the intensity of selection, genetic advantages of size and generation interval of four categories of breeding animals. Contribution categories in genetic breeding progress for mercy is: bulls fathers - 36,9-41,2 %; cows fathers - 34,2-36,0 %; bulls mothers - 18,0-22,3 % and cows mothers 4,8-5,1 %.

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