Evidence for introgression in differentiated North-American and Finnish Drosophila montana populations

The virilis group species Drosophila montana is widely distributed around the northern hemisphere. Here we show that it consists of at least two well differentiated populations (Finnish and North-American populations) that have been diverging for the last 0.55-0.95 My. These populations show signifi...

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Bibliographic Details
Published in:Genetica 2005-03, Vol.123 (3), p.285-293
Main Authors: Päällysaho, Seliina, Vieira, Cristina P, Hoikkala, Anneli, Vieira, Jorge
Format: Article
Language:English
Subjects:
Alaska
Animals
Animals, Wild
Canada
Drosophila - genetics
Drosophila montana
Finland
Genes, Insect - genetics
Genetics
Genetics, Population
Hybridization, Genetic - genetics
Male
Utah
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Summary:The virilis group species Drosophila montana is widely distributed around the northern hemisphere. Here we show that it consists of at least two well differentiated populations (Finnish and North-American populations) that have been diverging for the last 0.55-0.95 My. These populations show significant chromosomal, behavioural and morphological differences, but no apparent postzygotic isolation. Evidence for introgression is found for both Finnish and North-American populations at two out of the three X-linked genes (fused, elav and su(s)) studied here. In the light of these findings, previously reported evidence for selective sweeps in D. montana populations is re-evaluated.
ISSN:0016-6707
1573-6857
DOI:10.1007/s10709-004-5090-9