Parallel Speciation of Wild Rice Associated with Habitat Shifts
Parallel Speciation of Wild Rice Associated with Habitat Shifts
复制标题
与栖息地转变相关的野生稻的平行物种形成。
DOI：
10.1093/molbev/msz029
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发表时间：
2019-05-01
影响因子：
10.7
通讯作者：
Ge, Song
中科院分区：
文献类型：
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作者：
Cai, Zhe;Zhou, Lian;Ge, Song
平行物种形成的发生强烈暗示了自然选择的作用。然而，目前还不清楚平行物种形成现象的普遍性，因为它只在少数动物物种中显示。特别是，适应过程和平行物种形成过程的机制仍然难以捉摸。本研究采用群体基因组学、共同花园和杂交实验相结合的方法，对来自野生稻的野生稻物种Oryza nivara的平行物种形成进行了研究。鲁菲波贡。我们证明了O. nivara多次起源于不同的O. rufipogon种群，并揭示了不同的O. nivara种群在趋异选择下进化出相似的表型，反映了古O. rufipogon种群向干旱生境迁移。在O. nivara和O. rufipogon在没有任何postmating障碍之间和这些物种内。这些结果表明，开花时间是一个“神奇”的特性，有助于当地的适应和生殖隔离在野生稻物种的起源。因此，我们的研究证明了一个令人信服的情况下，平行的生态物种形成的结果，适应新的环境。
The occurrence of parallel speciation strongly implies the action of natural selection. However, it is unclear how general a phenomena parallel speciation is since it was only shown in a small number of animal species. In particular, the adaptive process and mechanisms underlying the process of parallel speciation remain elusive. Here, we used an integrative approach incorporating population genomics, common garden, and crossing experiments to investigate parallel speciation of the wild rice species Oryza nivara from O. rufipogon. We demonstrated that O. nivara originated multiple times from different O. rufipogon populations and revealed that different O. nivara populations have evolved similar phenotypes under divergent selection, a reflection of recurrent local adaptation of ancient O. rufipogon populations to dry habitats. Almost completed premating isolation was detected between O. nivara and O. rufipogon in the absence of any postmating barriers between and within these species. These results suggest that flowering time is a "magic" trait that contributes to both local adaptation and reproductive isolation in the origin of wild rice species. Our study thus demonstrates a convincing case of parallel ecological speciation as a consequence of adaptation to new environments.