Growth and meat productivity of bulls depending on the similarity of their blood group B antigens with mothers

Various molecular genetic markers are used to comprehensively assess the breeding value of animals based on information. Therefore, an important place in qualitative improvement beef cattle breeds is occupied by methods animal selection using immunogenetic characteristics their blood. The purpose study determine dependence weight growth and meat productivity Ukrainian breed number similar antigenic factors B blood group system them mothers. After weaning, first contained bulls (n = 12) who had antigens from 2 6 inclusive. second 15) – 7 13. When studying features gain bulls, it was proved that similarity groups between mother offspring informative regarding homo- or heterozygosity latter. It found with a lower amount outperformed (by 9.3%) homozygous peers test 8 18 months age terms average daily higher live 8.0%) at months, indicating better early maturity. With offspring, expression forms 7.8% 6.0% higher, respectively, 15 age.After slaughter, there no significant difference heterozygous productivity, including pre-slaughter slaughter weight. selecting offsprings fewer mother, they tend reduce yield 0.5 points) muscle content carcasses 3.2%). smaller system, mothers, will help improve forms, allow predicting future