[Genetic structure of the Siberian Sucker (Catostomus catostomus rostratus) according to data on sequence variation of the mtDNA cytochrome B gene].

Data regarding the structure and variation of the nucleotide sequence of the cytochrome b gene of mitochondrial DNA of the Siberian Sucker from the Kolyma River were obtained. Analysis of the median network revealed that evolutionary lines diverged from a common ancestor. Penetration of the sucker into Asia from Northern America took place between the Early and Middle Pleistocene.

[Variability of cytochrome b gene of mitochondrial DNA of pink salmon Oncorhynchus gorbuscha(Walbaum) from the rivers of the continental coast of the Sea of Okhotsk and Zavyalov Island].

Data on the structure and variability of the nucleotide sequence of the cytochrome b (cytb) gene fragment of mitochondrial DNA (mtDNA) in pink salmon of adjacent generations from the rivers of the continental coast of the Sea of Okhotsk and Zavyalov Island were obtained. The differences between adjacent generations were discovered. By the marker studied, pink salmon of the even-year line are characterized by a high level of genetic variability.

[The genetic structure of chum salmon (Oncorhynchus keta Walbaum) populations inferred from the nucleotide variation of the mitochondrial DNA cytochrome b gene].

The nucleotide sequences of a fragment of the mitochondrial DNA cytochrome b gene were determined in 12 chum salmon populations from the Russian Far East. The level of genetic diversity in the chum salmon populations from the Iturup Island, northern coast of the Sea of Okhotsk, and Anadyr' River was found to be higher than in the populations from Kamchatka and Sakhalin, which may be related to the history of their origin and dispersal. The proportions of intrapopulation genetic variability (F(ct)) and interpopulation genetic variability within the groups (F(sc)) account for 90.

[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.