文献类型： 外文期刊

作者： Cai, Zhe ² ; Zhou, Lian ¹ ; Ren, Ning-Ning ¹ ; Xu, Xun ¹ ; Liu, Rong ¹ ; Huang, Lei ¹ ; Zheng, Xiao-Ming ¹ ; Meng, Qing-L ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China

2.Univ Chinese Acad Sci, Beijing, Peoples R China

3.Guangxi Acad Agr Sci, Nanning, Guangxi, Peoples R China

4.China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou, Zhejiang, Peoples R China

关键词： parallel speciation; reproductive isolation; adaptation; divergent selection; wild rice

期刊名称：MOLECULAR BIOLOGY AND EVOLUTION （ 影响因子：16.24； 五年影响因子：18.67 ）

ISSN： 0737-4038

年卷期： 2019 年 36 卷 5 期

页码：

收录情况： SCI

摘要： 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.