Polymorphic systems of blood groups and the productivity of ural type cattle

Abstract

The relationship between blood group alleles inheritance and the first milk yield of cows per herd of heifers was studied on 1655 individuals. Milk production performance of heifers that received the analyzed allele from a father, a mother, or without regard to the mode of inheritance was compared with the same parameter of those animals that did not have the analyzed allele. The allele E′3F′2G′O′G″ was found to be an immunogenetic marker of high milk yield. The difference in milk yield between carriers of this allele and herdmates was significant (P < 0.001) and equaled 384 kg of milk. The most common alleles in the population G2Y2E′1Q′ and I2 were neutral with regard to milk yield. The presence of alleles E′1, G′′, and O3J′2K′O′ in a genotype was associated with reduced milk yield in Ural type cattle.