The characteristics of bull-producers with different genotypes of beta-casein by origin

We presented (showed) preliminary estimate of tribal value bull-producers with difference genotypes of beta-casein. Were studied signs to milk productivity (the yield of milk, content and amount of milk fat) nearest female forefather bull-producer with АА and AB genotypes of beta-casein. Researches have shown, that bull-producers with genotype АА of beta casein are more highly appreciated by origin.