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Phylogeography of the barbel (Barbus barbus) assessed by mitochondrial DNA variation

Authors

  • P. Kotlík,

    Corresponding author
    1. Laboratoire Génome, Populations, Interactions CNRS UMR 50003, Université Montpellier 2, Place E. Bataillon, 34095 Montpellier Cedex 5, France,
    2. Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Liběchov, Czech Republic
      P. Kotlík. †Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Liběchov, Czech Republic. Fax: ++ 420 206 697 186; E-mail:kotlik@iapg.cas.cz
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  • P. Berrebi

    1. Laboratoire Génome, Populations, Interactions CNRS UMR 50003, Université Montpellier 2, Place E. Bataillon, 34095 Montpellier Cedex 5, France,
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    • Present address: UMR 5119 ‘Ecosystèmes Lagunaires’ CP 093, Université Montpellier 2, Place E. Bataillon, 34095 Montpellier Cedex 5, France.


P. Kotlík. †Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Liběchov, Czech Republic. Fax: ++ 420 206 697 186; E-mail:kotlik@iapg.cas.cz

Abstract

Using the phylogeographic framework, we assessed the DNA sequence variation at the mitochondrial cytochrome b gene across the distribution range of the barbel Barbus barbus, a widely distributed European cyprinid. Reciprocal monophyly of non-Mediterranean European and Balkan/Anatolian populations is taken as evidence for a long-term barrier to gene flow, and interpreted as a consequence of survival of the species in two separate refugia during several later glacial cycles. Lack of profound genealogical divergence across Europe from western France to the northwestern Black Sea basin is consistent with recent colonization of this area from a single glacial refuge, which was probably located in the Danube River basin. This may have occurred in two steps: into the Western European river basins during the last interglacial, and throughout the Central European river basins after the last glacial. The populations from the Balkans and Anatolia apparently did not contribute mitochondrial DNA to the post-Pleistocene colonization of non-Mediterranean Europe. Lack of detectable variation within the Balkans/Anatolia is attributed mainly to recent expansion throughout these regions, facilitated by the freshwater conditions and seashore regression in the Black Sea during the Late Pleistocene and Early Holocene.

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