McRobert S P, Schnee F B, Tompkins L
Department of Biology, Saint Joseph's University, Philadelphia, Pennsylvania 19131, USA.
Behav Genet. 1995 Jul;25(4):303-9. doi: 10.1007/BF02197279.
Two third-chromosome mutations in raised (rsd) stocks, when homozygous, cause the wings of Drosophila melanogaster adults to be held upright. Males expressing these mutations cannot vibrate their wings to produce the courtship song, which functions to increase female receptivity to copulation. As expected, rsd males are less successful when courting wild-type females. However, females from long-established rsd stocks are more receptive to courtship stimuli and mate more readily with both rsd and wild-type males than do wild-type females. Genetic analysis reveals dominant factors on the X and third chromosomes that, in combination, are responsible for the increased receptivity of rsd females. These observations suggest that the lack of courtship song in rsd stocks, which would be expected to reduce the vigor of the stock, may have functioned as a selective force, favoring mutations that increased female receptivity. Possible consequences of selection favoring the development of differential female receptivity on speciation are discussed.
在“raised（rsd）”品系中，两条三号染色体上的突变，当纯合时，会导致黑腹果蝇成虫的翅膀向上竖起。表达这些突变的雄性无法振动翅膀来产生求偶歌，而求偶歌的作用是提高雌性对交配的接受度。不出所料，rsd雄性在向野生型雌性求偶时成功率较低。然而，来自长期存在的rsd品系的雌性对求偶刺激更敏感，并且与rsd和野生型雄性交配都比野生型雌性更容易。遗传分析揭示了X染色体和三号染色体上的显性因子，它们共同作用导致了rsd雌性接受度的提高。这些观察结果表明，rsd品系中求偶歌的缺失，本应会降低该品系的活力，但可能起到了一种选择力的作用，有利于增加雌性接受度的突变。文中讨论了有利于雌性接受度差异发展的选择对物种形成可能产生的后果。
