INFLUENCE OF CAPN1C316G GENE POLYMORPHISM ON ECONOMIC AND USEFUL TRAITS OF TWO ECO-GROUPS OF ABERDEEN-ANGUS COWS

Abstract

The article presents results of a study of polymorphic state of CAPN1 C316 G single nucleotide (SNP) gene on economically useful traits of two eco-groups of cows of Aberdeen Angus herd and the ability of their inheritanceby the offspring. The authors found that domestically bred cows were significantly superior to Australian peers in live weight by 9.8% (P≤0.001) and in rump height by 4.1% (P≤0.001). Moreover, the correlation coefficient between live weight and rump height was 0.76, between milk productivity and rump height (negative) - 0.09. In addition, it was revealed that the correlation coefficient between parameters of live weight of cows and live weight of the offspring at the age of 15 months was 0.46, between live weight of cows and rump height of bulls at the age of 15 months was 0.48 and between rump height of cows and bulls - 0.48, in this respect, a significant degree of heritability was 0.21, 0.23 and 0.23, respectively. As a result of CAPN1 C316 gene polymorphism, cows of the GG genotype were significantly superior to their peers of the CG genotypes in terms of live weight - Australian by 4.8% and domestic selection by 2.4% (Р≤0.05). Concurrently, the lowest variability coefficient of breeding traits (such as live weight and height in the rump) was noted in cows Design 1015 homozygous GG genotypes and heterozygous CG, as well as Bismarck 5682 in terms of rump height of GG genotype, which shows the ability of these categories of animals to inherit higher than the marked signs. At the same time, an increase of the G allele proportion in the genotype of cows of Australian and domestic selection contributes to a significant increase in live weight of animals by 6.5% (P≤0.001) and rump height by 2.4% (P≤0.01). Moreover, the dynamics of development of economically useful traits and the ability of their inheritance by cows of Aberdeen Angus breed was established as a genetically determined fact.