Preservation of the genetic diversity of the sevryuga (Acipenser stellatus Pall) in conditions of artificial reproduction

Abstract

According to the lactadehydrogenase locus, the genetic diversity of 9 samples of the Volga sevryuga of different origin was studied. In total, 733 pieces of young sevryuga, 99 pieces of producers and 107 pieces were studied. four-year-olds of sevryuga with MPERZ. To assess the genetic variability of lactate dehyrogenase allozymes, the method of polyacrylamide gel electrophoresis was used, as the most appropriate for assessing the influence of the environment in natural and domesticated populations. It is shown that the young sevryuga, grown in the conditions of 6 Astrakhan sturgeon hatcheries, differs significantly from the control group of natural producers. The LDH-3 lactate dehydrogenase locus is represented by 6 genotypes. 5 genotypes were found in producers, in the absence of only genotype 100/112. Genotypes 70/112 and 112/122 are missing in the samples from all plants and MPERZ, while genotype 70/70, which was found in excess at MPERZ, is also missing in three plants. However, in general, only 2 genotypes out of 6 are missing for all ARI. A study of the dynamics of the frequency of alleles in this set of samples showed that in 4 samples with ARI and on MPRZ there is no allele 112. However, in general, the ARI allele persists. Thus, it is shown that due to the different genetic variability of LDH-3 in juveniles from different acute respiratory infections, the genetic diversity in the samples as a whole approaches the indicators of producers. Therefore, the preservation of a variety of growing conditions for young sevryuga will contribute to the preservation of its genetic diversity.