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Unidirectional Incompatibility between Populations of Drosophila simulans

Ary A. Hoffmann, Michael Turelli and Gail M. Simmons
Evolution
Vol. 40, No. 4 (Jul., 1986), pp. 692-701
DOI: 10.2307/2408456
Stable URL: http://www.jstor.org/stable/2408456
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Unidirectional Incompatibility between Populations of Drosophila simulans
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Abstract

Drosophila simulans females from a strain collected at Watsonville, CA produce very few offspring when mated with males from a strain collected at Riverside 510 km away. This incompatibility does not exist in the reciprocal cross. In the incompatible cross, mating and oviposition are normal, but eggs fail to hatch. A survey of other California populations indicates that unidirectional incompatibility is widespread. The incompatibility is maternally inherited over one generation. Using older Riverside males or rearing the strains at 28⚬C suppresses incompatibility. Culturing the strains on medium with tetracycline restores compatibility, suggesting the involvement of a microorganism.

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