Reproductive isolation in natural populations of Drosophila melanogaster from Brazzaville (Congo)

Haerty, W. ORCID:, Jallon, J. M., Rouault, J., Bazin, C. and Capy, P. (2002) Reproductive isolation in natural populations of Drosophila melanogaster from Brazzaville (Congo). Genetica, 116 (2-3). pp. 215-224. ISSN 0016-6707

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The aim of this work is to analyze the homogamy previously detected between two natural populations of Drosophila melanogaster from Brazzaville. It is shown that mating isolation was still maintained under laboratory conditions 10 years after the populations samples were trapped. Isolation seemed to be due mainly to premating isolation and we checked for any suggestion of post-mating mortality of hybrids. Pre-mating isolation was not symmetrical, and significant X2 values were found in 3/4 possible 3-way mating choice experiments. The only exception involved a male from the countryside and two females (one from each population) for which no significant mating preference was detected. Mortality of hybrids was intermediate between those of the parental strains showing a clear maternal effect and the existence of partial dominance. Major differences in the cuticular hydrocarbons were also found and they could account for the isolation. These findings in populations from African breweries indicate that they are closely related to European ones, suggesting that this phenomenon is not a case of sympatric speciation, but probably attributable to the reintroduction of an allopatric population.

Item Type: Article
Additional Information: Funding Information: This work was supported by the MENRT. We would like to thank Helena Alves for her work on gas chromatography. The English text was reviewed by Monika Gosh. We thank the two unknown referees and the corresponding editor for the comments on the early version of the manuscript.
Uncontrolled Keywords: cuticular hydrocarbons,drosophila melanogaster,mating choice,post-mating isolation,pre-mating isolation,sexual isolation,animal science and zoology,genetics,plant science,insect science ,/dk/atira/pure/subjectarea/asjc/1100/1103
Faculty \ School: Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Centres > Norwich Institute for Healthy Aging
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Depositing User: LivePure Connector
Date Deposited: 15 Sep 2022 15:32
Last Modified: 18 Apr 2023 21:35
DOI: 10.1023/A:1021288527291

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