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The Reproductive Relationships of Drosophila sechellia with D. mauritiana, D. simulans, and D. melanogaster from the Afrotropical Region
Daniel Lachaise, Jean R. David, Francoise Lemeunier, Leonidas Tsacas and Michael Ashburner
Vol. 40, No. 2 (Mar., 1986), pp. 262-271
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2408806
Page Count: 10
You can always find the topics here!Topics: Hybridity, Female animals, Drosophila, Species, Testes, Genetics, Endemic species, Spermatozoa, Genetic hybridization, Mating behavior
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Hybridization tests among the four sibling species of the Drosophila melanogaster complex were made to determine the reproductive status of the recently discovered D. sechellia (which is endemic to a few islands and islets of the Seychelles archipelago) with regard to its three close relatives, D. mauritiana (endemic to Mauritius) and Afrotropical strains of the two cosmopolitan species D. melanogaster and D. simulans. Interstrain variation in the ability to hybridize with other species was also analyzed for D. melanogaster and D. simulans. D. mauritiana and D. simulans appear to be more weakly isolated from each other than either species is from D. sechellia. A striking unilateral mating success is observed in the cross of D. sechellia with D. simulans. The most extreme isolation is between D. melanogaster and its three siblings. Variation in the ability of strains to hybridize is observed in heterospecific crosses between D. simulans and either D. melanogaster or D. mauritiana.
Evolution © 1986 Society for the Study of Evolution