Sex-ratio segregation distortion associated with reproductive isolation in Drosophila
Sex-ratio segregation distortion associated with reproductive isolation in Drosophila
Tags: Evolution, Gene drive mechanisms, Other arthropods, Transmission distortionTao, YH, D. L.; Laurie, C. C., Proceedings of the National Academy of Sciences of the United States of America, 98:13183-13188. 2001.
Sex-ratio distortion is the most common form of non-Mendelian segregation observed in natural populations. It may occur even more frequently than direct observations suggest, because the dysgenic population consequences of a biased sex ratio are expected to result in the rapid evolution of suppressors, resulting in suppressed or “cryptic” segregation distortion. Here we report evidence for cryptic sex-ratio distortion that was discovered by introgressing segments of the genome of Drosophila mauritiana into the genome of Drosophila simulans. The autosomal suppressor of sex-ratio distortion, which is also associated with a reduction in hybrid male fertility, has been genetically localized to a region smaller than 80-kb pairs in chromosome 3.
