The Sex-Ratio Trait in Drosophila simulans: Genetic Analysis of Distortion and Suppression | Zendy

Michel Cazemajor | Zendy; Claudie Landré | Zendy; Catherine MontchampMoreau | Zendy

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The Sex-Ratio Trait in Drosophila simulans: Genetic Analysis of Distortion and Suppression

Author(s) -

Michel Cazemajor,

Claudie Landré,

Catherine MontchampMoreau

Publication year - 1997

Publication title -

genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

eISSN - 1943-2631

pISSN - 0016-6731

DOI - 10.1093/genetics/147.2.635

Subject(s) - biology , meiotic drive , sex ratio , autosome , genetics , drosophila (subgenus) , x chromosome , trait , chromosome , meiosis , y chromosome , gene , population , demography , sociology , computer science , programming language

The sex-ratio trait described in several Drosophila species is a type of naturally occurring X-linked meiotic drive that causes males bearing a sex-ratio X chromosome to produce progenies with a large excess of females. We have previously reported the occurrence of sex-ratio X chromosomes in Drosophila simulans. In this species, because of the co-occurrence of drive suppressors, the natural populations and the derived laboratory strains show an equal sex-ratio even when sex-ratio X chromosomes are present at a high frequency. The presence of sex-ratio X chromosomes is established via crosses with a standard strain that is devoid of drive suppressors. In this article, we show first that the sex-ratio trait in D. simulans results from the action of several X-linked loci. Second we describe drive suppressors on each major autosome as well as on the Y chromosome. The Y-linked factors suppress the drive partially whereas the autosomal suppression can be complete.

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