[Polymorphism of the cytochrome b gene fragment of mitochondrial DNA of chum salmon Oncorhynchus keta (Walbaum) from the Ola River (northern coast of the Sea of Okhotsk)].

Sequencing of 395 bp long fragments of cytochrome b gene occupying the 15396-15790 bp positions of mtDNA, the data on the structure and variability of the studied region in chum salmon from the Ola River (northern coast of the Sea of Okhtosk) were obtained for the first time. Nine haplotype variants and four protein modifications were obtained. The medial net was built reflecting the variability and phylogenetic relationships of haplotypes in the gene pool of the studied population of the chum salmon from the Ola River. Comparative analysis of the published and original data showed that the Ola chum salmon differs from the Canadian salmon ninth genotypically (in structure of cytochrome b gene) and in the amino acid sequence of the studied site of the enzyme.