Genetic characteristics of populations of inconnu Stenodus leucichthys nelma (Pallas, 1773) from rivers of Western Siberia
DOI:
https://doi.org/10.33910/2686-9519-2026-18-2-522-534Keywords:
inconnu, genetic polymorphism, population differentiation, DNA markers, the Taz River, the Severnaya Sosva River, the Ob River, the Irtysh River, West SiberiaAbstract
The article presents first data on genetic polymorphism of inconnu Stenodus leucichthys nelma (Pallas, 1773) populations in the Ob, Irtysh, Severnaya Sosva, and Taz rivers of Western Siberia, Russia. A total of 69 inconnu specimens from five localities were studied using 33 inter simple sequence repeats markers. Low genetic polymorphism was detected in natural populations of inconnu from Western Siberian rivers. The proportion of polymorphic loci (P) was 30–45%, and genetic diversity (h) varied from 0.12 to 0.21. The genetic diversity was 1.5 times greater in inconnu populations of Irtysh River compared to populations of the Ob and Taz rivers. Populations of inconnu of the Severnaya Sosva and Taz rivers were genetically closer to each other than to populations of the Irtysh and Ob rivers. Genetic differentiation of inconnu in the studied part of the distribution area is well-defined; interpopulation diversity accounts for 35% of the genetic diversity (Gst = 0.351), while gene flow is low (Nm = 0.924). Genetic data confirm the distinction of two inconnu population: northern (the Taz River, Severnaya Sosva River) and southern (the Irtysh River). The data on genetic polymorphism and differentiation of inconnu populations from the rivers of Western Siberia can be useful for making scientifically based decisions on the restoration and rational use of stocks of this valuable species of whitefish.
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Литература
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