| 要旨 |
Artificial selection experiments on male eye span in stalk-eyed flies demonstrated that short eye span lines have female-biased offspring and females usually prefer long eye span lines to short eye span lines. The source of female-biased sex ratio is considered as X-linked meiotic drive. Lande and Wilkinson (1999) proposed a model that sexual selection for X-linked male character reduced meiotic drive in X chromosome. In that model, meiotic drive suppression in Y chromosome was not incorporated. Genetic analysis showed that offspring were male-biased when a drive resistant Y chromosome paired with a driving X chromosome. The frequency of a meiotic drive suppression increased in long eye span lines. To investigate the effect of meiotic drive suppression, we construct an individual-based model of stalk-eyed flies incorporating the suppression, and discuss the correlation between long eye stalk and the meiotic drive suppressor.
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