The concentration of blood groups alleles in bulls-sires from the Oryol population of dairy cattle

The study of immunogenetic polymorphism in cattle breeding is an integral part of not only applied but basic research too. The use of blood groups in breeding enhances the culture of animal husbandry. The authors used research methods generally accepted in studying blood groups and allele concentrations. It was found that the А1, Х2, Е, F, Hʹ erythrocyte factors had the highest occurrence (among 50-70% of sires). The F2, Рʹ2 and K antigens had the lowest concentration and were quite rare. The erythrocyte factors common to Holstein bull sires (А1, G2, O1, Y2, Eʹ1, Qʹ, W, X2, E, Cʺ, F, Hʹ, L) were evidence of a high genetic potential for milk yields not only when analyzing the actual data of ancestors but also when analyzing the milk yields of daughters.