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Advisor(s)
Abstract(s)
The genetic structure In Atlantic Islands and continental populations of Drosophila
subobscura has been studied using autosomal and sex-linked allozymes and ml tochondrial DNA (mtDNA) haplotypes. From the data it Is deduced that whereas the
Canary Islands have long been isolated, the neighboring island of Madeira has been
subjected to continuous migration from the mainland. In addition, sex-linked allo zymes and mtDNA data show a large divergence between the geologically younger
western Islands of the Canarian Archipelago and the older central ones, finding
strong founder effects In the former. Divergence rates of sex-linked and mltochon drlal genes relative to autosomlc loci several times higher than expected under
neutrality have been explained by differential migration between sexes. The Ca narian Archipelago colonization fits in well with a stepping-stone model of a direc tional east-west migration that parallels the geological origin of these Islands.
Description
Keywords
Drosophila subobscura Population genetic structure Colonization Canárias (Espanha) Madeira (Portugal) . Faculdade de Ciências da Vida
Citation
Pinto, F. M., Brehm, A., Hernandez, M., Larruga, J. M., González, A. M., & Cabrera, V. M. (1997). Population genetic structure and colonization sequence of Drosophila subobscura in the Canaries and Madeira Atlantic islands as inferred by autosomal, sex-linked and mtDNA traits. Journal of Heredity, 88(2), 108-114.
Publisher
Oxford University Press