Генетическое разнообразие донорной и интродуцированной популяций кеты Oncorhynchus keta (Walbaum) из рек Яма и Кулькуты (северное побережье Охотского моря)

Abstract

The nucleotide sequences of the mtDNA cytb and COI genes of the chum salmon Oncorhynchus keta (Walbaum) from the rivers of the Sea of Okhotsk northern coast (Yama - donor, Kulkuty - artificially created population) have been determined. Polymorphism of the studied molecular markers has been noted. Unique haplotypes occurring only in one of the studied populations were found. The genetic distance calculated between the Yama and Kulkuty chum salmon populations indicates the absence of statistically significant differences between them. Nevertheless, the genetic diversity in a sample from an artificially created population tends to increase comparing to indicators characterizing the donor population. This may be associated with the formation peculiarities of the Kulkuty chum salmon genetic structure. Besides, the influence of the straying, amounted to 4 %, cannot be excluded. Apparently, haplotypes introduced as a result of inter-population exchange are successfully maintained through artificial reproduction. This has caused some change in the gene pool of the artificial population compared to the donor one.