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首页> 外文期刊>Current Opinion in Genetics & Development >Genetics and phylogenetics of rice domestication
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Genetics and phylogenetics of rice domestication

机译：水稻驯化的遗传学和系统发育

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摘要

With genetically divergent cultivars and ecologically distinct wild progenitors, rice has posed a great challenge to the genetic and phylogenetic studies of the origin and evolution of crop species. A growing body of phylogenetic evidence suggested that the diverged genomic backgrounds of indica and japonica rice cultivars were derived independently from genetically distinct wild populations. However, a domestication gene, sh4, which was responsible for the reduction of grain shattering, seems to have originated only once, and it is now fixed in both cultivars. Two models have been proposed to reconcile these data. Whereas the 'combination model' emphasizes the importance of early introgression between independently domesticated cultivars, the 'snowballing model' emphasizes the importance of introgression from local populations of wild species into an ancestral domesticated population. In either case, the domestication of rice was a dynamic process.
机译：水稻具有遗​​传多样性的品种和生态学上不同的野生祖先，因此对农作物物种起源和进化的遗传和系统发育研究提出了巨大的挑战。越来越多的系统发育证据表明，in稻和粳稻品种的不同基因组背景是独立于遗传上不同的野生种群的。然而，负责减少谷物破碎的驯化基因sh4似乎只起源了一次，并且现在已在两个品种中固定下来。已经提出了两种模型来调和这些数据。 “组合模型”强调了独立驯化品种之间早期渗入的重要性，而“雪球模型”强调了从野生物种的本地种群向祖先驯化种群进行渗入的重要性。无论哪种情况，稻米的驯化都是一个动态的过程。

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