THE RESULTS of MONITORING the GENETIC STRUCTURE of the SHEEP POPULATION the ASCANIAN TYPE of PROLIFICACY KARAKUL SHEEP
Aim. The investigation of the genetic structure the Askanian selection Prolificacy Karakul sheep population on the distribution of protein blood loci markers over a long time period. Methods. Molecular genetics, population genetic, biometric. Result. The peculiarities of the genetic structure of a population the Ascanian Type Prolificacy Karakul breed of sheep by the polymorphic loci markers distribution by the results of longterm monitoring (10 generations) were studied. For this purpose, a complex of population genetic markers of hemoglobin and transferrin transport proteins was used. At the same time, a low level of genetic information dynamics was established during the studied period of breeding this sheep flock and the lack of a reliable effect the individual’s artificial selection on the population structure by molecular genetics parameters. The presented result is also due to the following factors: the lack of significant differences in the series of generations in the degree of heterozygosity and the level of polymorphism of the loci; high genetic similarity of generations. And those differences that occurred in the concentration of individual genotypes and alleles are explained by automatic genetic processes. That is, often random, stochastic changes, due to the fact that in a limited set of individuals, to which a herd of Ascanian Prolificacy sheep belong, an error is present. This error changes the probability of transferring the allele’s concentration from generation to generation. Conclusions. The main conclusion is that monitoring the population of Ascanian type sheep of the prolificacy Karakul for a long microevolutionary period (10 generations) did not reveal significant changes in its genetic structure. The concentration of protein blood loci markers during the observation period did not have significant fluctuations. The degree of heterozygosity for Hb and Tf loci and the level of their polymorphism almost did not change. And those changes that took place in individual genotypes and alleles in certain years of analysis are due, in our opinion, to genetic-automatic processes.