Sweigart Andrea L, Willis John H
Department of Genetics, University of Georgia Athens, GA 30602, USA.
F1000 Biol Rep. 2012;4:23. doi: 10.3410/B4-23. Epub 2012 Dec 3.
In just the last few years, plant geneticists have made tremendous progress in identifying the molecular genetic basis of postzygotic reproductive isolation. With more than a dozen genes now cloned, it is clear that plant hybrid incompatibilities usually evolve via two or more mutational steps, as is predicted by the Dobzhansky-Muller model. There is evidence that natural selection or random genetic drift can be responsible for these incompatibilities.
就在过去几年里，植物遗传学家在确定合子后生殖隔离的分子遗传基础方面取得了巨大进展。现在已经克隆了十几个基因，很明显植物杂种不亲和性通常是通过两个或更多的突变步骤进化而来的，正如多布赞斯基-穆勒模型所预测的那样。有证据表明，自然选择或随机遗传漂变可能导致这些不亲和性。
