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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