Segregation Distortion in Hybrids Between the Bogota and USA Subspecies of Drosophila pseudoobscura

From: Genetics | Date: February 1, 2005| Author: Irving, Shannon; Orr, H Allen | Copyright information

ABSTRACT

We show that, contrary to claims in the literature, "sterile" males resulting from the cross of the Bogota and USA subspecies of Drosophila pseudoobscura are weakly fertile. Surprisingly, these hybrid males produce almost all daughters when crossed to females of any genotype (pure Bogota, pure USA, hybrid F^sub 1^). Several lines of evidence suggest that this sex ratio distortion is caused by sex chromosome segregation distortion in hybrid males. We genetically analyze this no...

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