Genetic differentiation of Arctic charr <Emphasis Type="Italic">Salvelinus alpinus</Emphasis> complex from Transbaikalia revealed by microsatellite markers |
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Authors: | N V Gordeeva A G Osinov S S Alekseyev A N Matveev V P Samusenok |
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Institution: | (1) Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 117334, Russia;(2) Faculty of Biology and Soil Biology, Irkutsk State University, ul. Sukhe-Batora 5, Irkutsk, 664011, Russia;(3) Faculty of Biology, Moscow State University, Vorob'evy Gory, Moscow, 119899, Russia |
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Abstract: | Variation at eight microsatellite loci was studied in Arctic charr Salvelinus alpinus complex from five Transbaikalian mountain lakes. Samples from three lakes included two sympatric charr forms (dwarf and small)
differing in trophic specialization, morphology and life cycle parameters. Sympatric forms were genetically closer to each
other than to charr from other lakes which evidences their independent origin in each of these lakes as the result of sympatric
speciation. In each lake, gene pools of sympatric forms were segregated to a different degree (estimates of F
ST
varying from 0.030–0.184 and those of ρ
ST
varying from 0.119–0.359). Hierarchical analysis of allelic frequencies variance (AMOVA) in Arctic charr from Lake Baikal,
the Vitim, and the Olekma basins showed that variation among and within these basins accounted for 19.5% of the interpopulational
variance each. In the AMOVA design, investigating differences among sympatric forms in three lakes these differences accounted
for 7.1% of the total variance. |
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Keywords: | |
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