GENOTYPE IN THE FORMATION OF FERTILITY INDICATORS IN RED-MOTTLED COWS

Decreased fertility is one of the main reasons for the culling of both dairy and meat-producing cattle in a herd of cows. A decrease in reproductive functions in farm animals is the main cause of material damage in the agricultural sector of the Russian Federation. As a result of DNA studies, first-time cows with undesirable loci in the STAT1, STAT3 and STAT5 genes with heterozygous and homozygous genotypes and animals free from these mutations were identified.