Comparative analysis of phenotypic data and genetic structure of Kalmyk cattle breed

Abstract

The main trends in the development of animal husbandry in the Republic of Kalmykia are considered. It is necessary to carry out the current selection to preserve and improve the genetic potential of animals. In the Republic of Kalmykia, immunogenetic expertise is effectively used in cattle breeding. The purpose of the study was to analyze statistical data on Kalmyk cattle in 1988 and 2018. It was found that the number of livestock increased by 324430 heads over 30 years. A comparative analysis of the exterior data of the animals showed that the bulls-producers in 2018 were more extensive compared to 1988: The difference in withers height was 1.6%, body length was 1.2, chest girth was 1.9, and cannon bone circumference was 5.7% (P<0.95). Positive dynamics were also observed in cows. The average live weight of sire bulls in 2018 was 796.7±3.7 kg, 35.2 kg (4.6%) higher than that of animals in 1988. Cows in 2018 outperformed 1988 animals by 26.1 kg (5.7%) in live weight (P><0.95). I’, C2, L’, and S2 antigens had met less frequently. I’, C2, L’, and S2 antigens had met less frequently. Thus, we can state that for 30 years, there have been changes in the frequency of occurrence of antigens in breeding farms and, consequently, changes in the gene pool. When comparing the increase and decrease in the frequency of occurrence of antigens between the two breeding farms, there are apparent differences, indicating a multidirectional selection.>˂0.95). Positive dynamics were also observed in cows. The average live weight of sire bulls in 2018 was 796.7±3.7 kg, 35.2 kg (4.6%) higher than that of animals in 1988. Cows in 2018 outperformed 1988 animals by 26.1 kg (5.7%) in live weight (P˂0.95). I’, C2, L’, and S2 antigens had met less frequently. I’, C2, L’, and S2 antigens had met less frequently. Thus, we can state that for 30 years, there have been changes in the frequency of occurrence of antigens in breeding farms and, consequently, changes in the gene pool. When comparing the increase and decrease in the frequency of occurrence of antigens between the two breeding farms, there are apparent differences, indicating a multidirectional selection.