Genetic variability and genetic differentiation in two Ovis species--domesticated (Askanian sheep, Sokilska and Kulunda sheep) and wild (bighorn sheep) were analyzed using different types of molecular-genetic markers--genetic-biochemical (30 loci) and DNA (ISSR-PCR) ones. High level of genetic variability was revealed. The average heterozygosity of biochemical markers loci was in range of 0.073-0.188. Markers involved into process of genofond divergence of two closely related species were revealed.
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