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Genetics Selection Evolution

, 33:671 | Cite as

Lack of congruence between morphometric evolution and genetic differentiation suggests a recent dispersal and local habitat adaptation of the Madeiran lizard Lacerta dugesii

  • António BrehmEmail author
  • Mahnaz Khadem
  • José Jesus
  • Paula Andrade
  • Luis Vicente
Open Access
Research

Abstract

Genetic differentiation among nine populations of the endemic lizard Lacerta dugesii Milne-Edwards 1829 (Lacertidae) from four groups of islands constituting the Archipelago of Madeira, was investigated by protein electrophoresis at 23 enzyme loci. Among twenty polymorphic loci, the total genetic diversity was due primarily to intra-population variation. The allele and genotypic frequencies among populations showed some heterogeneity, allowing the species to present a structuring pattern compatible with their geographical clustering. Some evidence suggests that selection acting on some loci in different ecological conditions may be responsible for the clustering of the populations studied. There was no apparent isolation effect expected under an "island" model of population divergence, and no correlation was found between genetic and geographic distances among populations. Morphological variation of the proposed three L. dugesii subspecies is not congruent with the allozyme analysis. This most probably suggests a rapid colonization of the islands followed by a strong effect of selection operating over the morphological characters used to define the subspecies.

Keywords

Lacerta dugesii allozymes morphology geographical population structure 

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Copyright information

© INRA, EDP Sciences 2001

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Authors and Affiliations

  • António Brehm
    • 1
    Email author
  • Mahnaz Khadem
    • 2
  • José Jesus
    • 1
  • Paula Andrade
    • 2
  • Luis Vicente
    • 3
  1. 1.Centre of Biological and Geological SciencesCampus of PenteadaFunchalPortugal
  2. 2.Department of BiologyUniversity of MadeiraFunchalPortugal
  3. 3.Centre of Environmental Biology, Departments of Zoology and Anthropology, Science Faculty of LisbonUniversity of LisbonLisbonPortugal

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