Phylogeography of southern Asian Dolly Varden char <Emphasis Type="Italic">Salvelinus malma krascheninnikovi</Emphasis>: Genealogical analysis of mitochondrial DNA |
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| Authors: | A G Oleinik L A Skurikhina E I Chukova |
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| Institution: | (1) Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia;(2) Zhirmunsky Institute of Marine Biology, Far East Branch of Russian Academy of Sciences, Vladivostok, Russia |
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| Abstract: | Phylogeography of southern Asian Dolly Varden char was studied using the data on mtDNA variation (regions ND1/ND2, ND5/ND6,
and Cytb/D loop) obtained using PCR-RFLP analysis. Analysis of contemporary population genetic structure showed that Salvelinus malma krascheninnikovi throughout the whole species range was characterized by high population differentiation in combination with rather small
differences between the populations from remote regions. The genealogy of mtDNA haplotypes was reconstructed and nested clade
analysis of geographical distances was performed. Geographical distribution of mtDNA haplotypes of S. m. krascheninnikovi was explained by population genetic processes (restricted gene flow), as well as by historical demographic events (range
expansion and fragmentation). It was demonstrated that the main demographic events were associated with cyclic processes of
the geological formation of the Sea of Japan and adjacent territories. Furthermore, genealogical tree of S. m. krascheninnikovi contained the traces of secondary contact between isolated phylogeographical lineages. |
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