Revisiting the role of introgression vs shared ancestral polymorphisms as key processes shaping genetic diversity in the recently separated sibling species of the Anopheles gambiae complex

The role of interspecific hybridisation in the evolution of pest species is poorly understood. In mosquito disease vectors this is of particular importance due to the evolution of insecticide resistance and the proposed release of transgenic strains that are refractory to the malaria parasite. In th...

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Bibliographic Details
Published in:Heredity 2004-02, Vol.92 (2), p.61-68
Main Authors: Donnelly, M.J, Pinto, J, Girod, R, Besansky, N.J, Lehmann, T
Format: Article
Language:English
Subjects:
Africa
Animals
Anopheles - classification
Anopheles - genetics
Anopheles arabiensis
Anopheles gambiae
Biomedical and Life Sciences
Biomedicine
Culicidae
Cytogenetics
DNA, Mitochondrial - analysis
Ecology
Evolutionary Biology
Genetic diversity
Genetic Variation
Haplotypes
Human Genetics
Hybridization, Genetic - genetics
Insect Vectors - classification
Insect Vectors - genetics
Insecticides
introgression
Malaria
Mitochondrial DNA
original-article
Parasites
Phylogeny
Plant Genetics and Genomics
Polymorphism, Genetic
Sequence Analysis, DNA
Speciation
Vector-borne diseases
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Summary:The role of interspecific hybridisation in the evolution of pest species is poorly understood. In mosquito disease vectors this is of particular importance due to the evolution of insecticide resistance and the proposed release of transgenic strains that are refractory to the malaria parasite. In this study, we apply population genetic methods in a novel manner to determine whether mitochondrial DNA sequences have introgressed between the closely related African malaria vectors Anopheles gambiae and A. arabiensis . Our results suggest that speciation was geologically recent and ancestral haplotypes at the ND5 locus are retained in both species. In addition, comparing haplotype frequencies in allopatric and sympatric populations, suggest locale specific unidirectional introgression of mitochondria from A. arabiensis into A. gambiae .
ISSN:0018-067X
1365-2540
DOI:10.1038/sj.hdy.6800377