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Russian Journal of Genetics

, Volume 41, Issue 8, pp 897–906 | Cite as

Genetic Divergence of Chars of the Genus Salvelinus from Kronotsky Lake (Kamchatka Peninsula)

  • E. A. Salmenkova
  • V. T. Omel’chenko
  • O. A. Radchenko
  • N. V. Gordeeva
  • G. A. Rubtsova
  • N. S. Romanov
Plant Genetics

Abstract

Chars of the genus Salvelinus, inhabiting lakes and lake-river systems, comprise morphological and ecological forms whose taxonomic status is under dispute. In the present work, we have examined genetic variation and divergence in various chars from the Kronotsky lake basin: the lacustrine chars (white, nose, and longhead) and riverine Dolly Varden Salvelinus malma. The study was conducted using analysis of allozyme and microsatellite loci, myogens, RAPD, and restriction analysis of two mtDNA segments. The estimates of heterozygosity at allozyme and microsatellite loci were similar to the corresponding parameters in populations of northern Dolly Varden and Arctic char. Heterozygote deficit was recorded in both samples of separate forms, and in the total sample of all chars from Kronotsky Lake. For allozyme and microsatellite loci, appreciable genetic differentiation among the samples of different char forms was found, which was comparable to that among the spatially isolated populations of northern Dolly Varden. This result indicates reproductive isolation among the char forms examined. However, this isolation is not complete, because no fixed differences between the forms by any of the genetic systems analyzed were found. The genetic differentiation among different forms of lacustrine chars, which corresponds to the interpopulation rather than interspecific level, is thought to be explained by their comparatively recent divergence.

Keywords

Genetic Differentiation Microsatellite Locus Reproductive Isolation Lake Basin Genetic System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK “Nauka/Interperiodica” 2005

Authors and Affiliations

  • E. A. Salmenkova
    • 1
  • V. T. Omel’chenko
    • 2
  • O. A. Radchenko
    • 3
  • N. V. Gordeeva
    • 1
  • G. A. Rubtsova
    • 1
  • N. S. Romanov
    • 2
  1. 1.Vavilov Institute of General GeneticsRussian Academy of SciencesMoscowRussia
  2. 2.Institute of Marine BiologyRussian Academy of SciencesVladivostokRussia
  3. 3.Institute of Biological Problems of the NorthRussian Academy of SciencesMagadanRussia

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