Analysis of microsatellite variation in the rainbow trout <Emphasis Type="Italic">Parasalmo (Oncorhynchus) mykiss</Emphasis> from Kamchatka |
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Authors: | S D Pavlov A V Semenova G A Rubtsova K I Afanasiev |
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Institution: | (1) Department of Fisheries and Oceans, Pacific Biological Station, Nanaimo, BC, Canada, V9T 6N7 |
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Abstract: | Genetic variation of Kamchatka rainbow trout Parasalmo (O.) mykiss was examined using 10 microsatellite DNA loci, and phylogeographic comparison with other representatives of the species across
the distribution range was performed. It was demonstrated that Kamchatka populations differed from other geographic groups
of rainbow trout in a number of microsatellite loci. These populations also displayed distinct clustering and were characterized
by lower genetic diversity. Analysis of a set of 26 different microsatellite loci (personal and literature data) demonstrated
that most of the populations within the Kamchatka region were separated from one another, characterized by marked geographic
differentiation, and affiliation to certain river basins. In Kamchatka rainbow trout, with high degree of probability, three
geographic clusters (northwestern, southwestern, and eastern) were identified. In general, analysis of microsatellite DNA
supported the data on low genetic diversity of the Kamchatka group Parasalmo (O.) mykiss, based on the variation estimates for a number of genes of nuclear and mitochondrial DNA, and allozyme loci. |
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