Comparative microsatellite analysis of zeboid cattle with breeds of Bos taurus

Comparative genotyping of a population of zeboid cattle (Bos taurus × Bos indicus) and eight populations of B. taurus breeds, including six domestic (Нolmogorskaya, Yaroslavskaya, Red Gorbatovskaya, Kostromskaya, Tagil’skaya, Gray Ukrainian) and two transboundary European breeds (Holstein and Brown Swiss). A total of 562 individuals were examined. Based on the results of the STR analysis, it was found that all population samples of B. taurus were characterized by an average allelic diversity AR = 4.87–6.7 and a fairly high level of genetic variability HE = 0.68–0.76 with a slight predominance of random matings FIS = –0.1... 0.0. In zeboid cattle, the corresponding indicators were AR = 5.96, HE = 0.72 and FIS = –0.0278. At the same time, differences in the genetic structure of the B. taurus breeds under consideration were largely determined by population-demographic fluctuations, and the genetic and phenotypic heterogeneity detected in the population of zeboid cattle was determined by a decrease in the effect of artificial selection.