Abstract
Population genetic structure in polar bear (Ursus maritimus) from model areas in the Russian Arctic is considered based on materials collected in the period 2010–2021. Data on polymorphism of 17 microsatellite loci of nuclear DNA and a 610 nucleotide long mtDNA D-loop fragment were obtained for 93 animals. For the studied sample of adult polar bears, a high genetic diversity of nuclear DNA and a low value of nucleotide variability π for mitochondrial DNA were found. For all genetic markers, differentiation of bears from the southern part of the Barents Sea from animals from the north of the Barents and Kara seas was found. These groups differ in the distribution of the mitochondrial marker (θst = 0.270) and are weakly differentiated by nuclear loci (Rst = 0.018).
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