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

The genetic structure in Atlantic islands and continental populations of Drosophila subobscura has been studied using autosomal and sex-linked allozymes and mitochondrial DNA (mtDNA) haplotypes. From the data it is deduced that whereas the Canary Islands have long been isolated, the neighboring isla...

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Published in:The Journal of heredity 1997-03, Vol.88 (2), p.108-114
Main Authors: Pinto, F.M, Brehm, A, Hernandez, M, Larruga, J.M, Gonzalez, A.M, Carbrera, V.M
Format: Article
Language:English
Subjects:
animal breeding
animal genetics
Animal populations
Animals
arthropods
Atlantic Islands
Chromosomes
Deoxyribonucleic acid
DNA
DNA, Mitochondrial
Drosophila - genetics
Drosophila subobscura
entomology
Genes, Insect
Genetic Linkage
Genetics
Genetics, Population
Insects
Phylogeny
Portugal
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container_issue 2
container_start_page 108
container_title The Journal of heredity
container_volume 88
creator Pinto, F.M
Brehm, A
Hernandez, M
Larruga, J.M
Gonzalez, A.M
Carbrera, V.M
description The genetic structure in Atlantic islands and continental populations of Drosophila subobscura has been studied using autosomal and sex-linked allozymes and mitochondrial 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 allozymes 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 mitochondrial genes relative to autosomic loci several times higher than expected under neutrality have been explained by differential migration between sexes. The Canarian Archipelago colonization fits in well with a stepping-stone model of a directional east-west migration that parallels the geological origin of these islands.
doi_str_mv 10.1093/oxfordjournals.jhered.a023067
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1465-7333
1471-8505
language eng
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source Oxford Journals Online
subjects animal breeding
animal genetics
Animal populations
Animals
arthropods
Atlantic Islands
Chromosomes
Deoxyribonucleic acid
DNA
DNA, Mitochondrial
Drosophila - genetics
Drosophila subobscura
entomology
Genes, Insect
Genetic Linkage
Genetics
Genetics, Population
Insects
Phylogeny
Portugal
title 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
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