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Parallel evolution? Microsatellite variation of recently isolated marine and freshwater three-spined stickleback

Authors

  • G. Á. ÓLafsdóttir,

    Corresponding author
    1. * Department of Environmental and Evolutionary Biology, University of St Andrews, Dyers Brae Building, St Andrews KY16 9TS, U.K.andInstitute of Biology, University of Iceland, Sturlugata 7, Reykjavik IS101, Iceland
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  • S. S. Snorrason,

    1. * Department of Environmental and Evolutionary Biology, University of St Andrews, Dyers Brae Building, St Andrews KY16 9TS, U.K.andInstitute of Biology, University of Iceland, Sturlugata 7, Reykjavik IS101, Iceland
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  • M. G. Ritchie

    1. * Department of Environmental and Evolutionary Biology, University of St Andrews, Dyers Brae Building, St Andrews KY16 9TS, U.K.andInstitute of Biology, University of Iceland, Sturlugata 7, Reykjavik IS101, Iceland
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†Institute of Biology, University of Iceland, Sturlugata 7, Reykjavik IS101, Iceland. Tel.: + 354 525 5230; fax: + 354 525 4281; email: gaol@hi.is

Abstract

Variation at nine microsatellite loci, four of which are linked to phenotypic traits (spine length and lateral plate morphology) in Canadian three-spined stickleback Gasterosteus aculeatus, are used to test for selection on marine and freshwater three-spined stickleback morphs in Iceland. There are indications of strong selection on loci linked to dorsal spine length, providing another potential example of parallel divergence at the genomic level in three-spined stickleback.

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