EVALUATION OF DAUGHTERS OF BULLS DEPENDING ON BREEDING
The purpose of the research was the evaluation of bull breeders by female ancestor productivity in the highest lactation, and milk productivity of bull daughters depending on breeding. The research was carried out in six enterprises of the Udmurt Republic. Milk productivity was recorded once a month by control milking. The parental bull index was calculated to assess the genetic potential of breeding bulls, as well as the coefficient of realization of genetic potential. The results show that in the domestic breeding, the highest milk yield of mother bulls was in the Novosibirsk breeding - 13828 kg. Studies show that the highest milk of the mother of the mother of bulls was in the Leningrad selection - 13735 kg, and the mother of the fathers of bulls in the Moscow selection - 14922 kg. But, the highest fat and protein content in milk was in the mothers of bulls of Moscow breeding - 4.35 % and 3.51 %. Among the mothers of bulls of imported breeding, Dutch bulls had a milk - 16359 kg. But, in terms of fat and protein content, the mothers of German-bred bulls prevailed. The values in this group were 4.46% and 3.35 %. When comparing the parent index of domestic and imported breeding bulls, it can be noted that it is higher for all the analyzed signs in imported breeding bulls. When realizing the genetic potential, it was revealed that it is most fully realized by milk yield, as well as the fat and protein content in the milk of the daughters of bulls of Udmurt breeding. The proposed approach and methodology will reveal the milk productivity of the daughters of bulls, depending on the affiliation to breeding.