The effect of alleles of the ЕАВ-locus on the dairy productivity of red-and-white breed cows

Abstract

The results of studying the allelofond of 196 cows of red-and-white breed by EAB locus of blood groups in one of the breeding farms of the Republic of Mordovia using immunogenetic monitoring are presented. The studies were carried out in the immunogenetic laboratory of FGBNU VNIIplem according to generally accepted methods. The analysis showed that the most common alleles in the conditions of breeding in the Republic of Mordovia were G₂Y₂E₁'Q' (20.92%), Q'I'' (18.37%) and "-" (11.73%). The highest productivity on average for all lactations (10077 kg of milk) was obtained from cows carrying the Y₂ allele, and the highest percentage of fat in milk (4.09%) was obtained from cows with the "-" allele.