Genetic polymorphism of milk proteins in cows of Tatarstan type in connection with their resistance to mastitis

In this work, in the cows of the Tatarstan type genetic polymorphism for three milk proteins was studied: ß к - caseins and ß - lactoglobulin in connection with their mastitis morbidity. The studied proteins have polymorphism, according to two alleles: A and B, which formed three genotypes АА, BB and AB. A close relationship of these genotypes with the stability and mastitis morbidity has been established. The genotype AB ß - and к - caseins is associated with the stability of cows to mastitis, and the AA genotype, on the contrary, - with their susceptibility to this disease.