Wade M J, Patterson H, Chang N W, Johnson N A
Department of Ecology and Evolution, University of Chicago, IL 60637.
Heredity (Edinb). 1994 Feb;72 ( Pt 2):163-7. doi: 10.1038/hdy.1994.23.
We report the existence of postmating but prezygotic reproductive isolation within flour beetles of the genus Tribolium. Specifically, when a female of either T. castaneum or T. freemani is paired simultaneously with both a conspecific and a heterospecific male, virtually all of the offspring are sired by the conspecific male. In contrast, when a female of either species is paired only with a heterospecific male, she produces near normal numbers of offspring. Mate choice experiments rule out the possibility that premating reproductive isolation accounts for this phenomenon. A number of different mechanisms could explain this phenomenon of postmating but prezygotic reproductive isolation.
我们报告了在赤拟谷盗属的面粉甲虫中存在交配后但合子前的生殖隔离。具体而言，当栗色赤拟谷盗或弗里曼赤拟谷盗的雌性同时与同种和异种雄性配对时，几乎所有后代都是由同种雄性授精的。相比之下，当任一物种的雌性仅与异种雄性配对时，她产生的后代数量接近正常。配偶选择实验排除了交配前生殖隔离导致这种现象的可能性。许多不同的机制可以解释这种交配后但合子前的生殖隔离现象。
