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      Karyological and genetic variation in Middle Eastern lacertid lizards, Lacerta laevis and the Lacerta kulzeri complex: a case of chromosomal allopatric speciation.

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          Abstract

          Karyological (standard and C, Ag-NOR and Alu-I banding methods) and mtDNA analyses (cytochrome b and 12S rRNA) were conducted on specimens from eight allopatric populations of the Lacerta kulzeri complex. Parallel analyses were performed for comparison on Lacerta laevis specimens. Karyological and molecular studies support the morphological and ethological evidence indicating the specific separation between Lacerta laevis and Lacerta kulzeri. In the Lacerta kulzeri complex, chromosomal analysis substantiated an interpopulation differentiation roughly along a north-south trend, mainly regarding the sex chromosome morphology and heterochromatin. The cytochrome b and 12S rRNA gene analyses showed minor genetic differences that were considerably smaller than those commonly found in genetically isolated populations. The L. kulzeri populations from Barouk, Druze and Hermon show a mean genetic distance that, in other saurians, characterises subspecies. The conditions found in L. laevis and L. kulzeri are reminiscent of King's model of chromosomal primary allopatry and support the hypothesis that in these lacertid lizards chromosome variations can become fixed before the accumulation of the genetic mutations.

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          Author and article information

          Journal
          Chromosome Res
          Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology
          Springer Science and Business Media LLC
          0967-3849
          0967-3849
          2003
          : 11
          : 2
          Affiliations
          [1 ] Leiden University, Institute of Evolutionary and Ecological Sciences, Section Behavioural Biology, P.O. Box 9516, NL-2300 RA Leiden, The Netherlands.
          Article
          10.1023/a:1022872016503
          12733643
          07a0c9d4-f1d5-42ef-9700-9c5d9202905e
          History

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