POLYMORPHISM OF PROLACTIN IN TATARSTAN TYPE KHOLMOGOR BREED COWS
Tatarstan type genotypes of Kholmogor breed cows on prolactin gene locus at pedigree farm named by Vahitov were defined. PCR methods of cow blood analysis showed 3 genotypes such as AA, AB, BB with the following percentage 80,4: 14,9: 4,7 accordingly. The distribution of allele frequency was the following: A allele - 0,88, B allele - 0,12.