Genetic Features of the Bream Abramis brama from the Lake System of the Sebezhsky National Park

For the first time, the analysis of the genetic variability of microsatellite DNA for five loci in the bream Abramis brama (L.) from lakes Sebezhskoye and Necheritsa of the Sebezhsky National Park, Sebezhsky district of the Pskov region, included in the lake system, was carried out. The results obtained demonstrate the uniformity of estimates of the genetic variability of bream in the lake system. Estimates of the allelic diversity of microsatellite loci and the expected heterozygosity of local bream groups did not differ significantly. The total genetic differentiation of bream was θ = 0.004. 95% CI (-0.01; 0.01) and was significantly insignificant. The population-genetic structure based on the studied multilocus genotypes has not been revealed by the Bayesian analysis method. The result indicate a high level of gene flow between local bream groupings and make it possible to assume the presence of a genetically unified panmixed population in the Sebezh lakes system.