Reproductive Ability of Cows With Different Genotypes of Dairy Genes

Abstract

The aim of this work was to study the reproductive capacity of fresh cows with various genotypes of kappa-casein gene and diatsetilglitserin O-acetyl transferase. It was revealed that at an early age of insemination and calving, animals have a lower body weight at first calving. Cows on the gene locus of kappa-casein AB and BB, gene of butterfat AK and KK were observed elongated expectancy service- and between calving periods (106 and 394 days, 105 and 400 days) and a lower coefficient of reproductive ability and Doha’s index (0.93 and 46.2, 0.91 and 45.8), which suggests a slight decrease in their reproductive capacity.