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Sex‐ratio distortion in Drosophila simulans : co‐occurence of a meiotic drive and a suppressor of drive
Author(s) -
Merçot Hervé,
Atlan Anne,
Jacques Micheline,
MontchampMoreau Catherine
Publication year - 1995
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1046/j.1420-9101.1995.8030283.x
Subject(s) - biology , meiotic drive , wolbachia , sex ratio , genetics , meiosis , distortion (music) , drosophila (subgenus) , resistance (ecology) , zoology , evolutionary biology , ecology , demography , gene , population , physics , amplifier , optoelectronics , cmos , sociology
A sex‐ratio distortion factor was found at high frequency in D. simulans strains from Seychelles and New Caledonia. This factor is poorly or not expressed within those strains which are resistant to it. Its presence was detected by crossing females from New Caledonia or the Seychelles with males from a different geographic origin. Most of the F1 males obtained produced an excess of females (up to 99%) in their progeny. The two strains are infected with Wolbachia , but these micro‐organisms are not involved in the sex‐ratio distortion. The sex‐ratio factor is shown to be an X‐linked meiotic driver; nuclear resistance factor(s) act by suppressing the drive. It is likely that the same X‐located driver invaded the two populations, which subsequently developed resistance factor(s) against it.