A toxin-antidote system contributes to interspecific reproductive isolation in rice

文献类型： 外文期刊

第一作者： You, Shimin

作者： You, Shimin;Zhao, Zhigang;Yu, Xiaowen;Lei, Dekun;Chen, Haiyuan;Xiao, Yanjia;Wang, Qiming;Lu, Jiayu;Chen, Keyi;Zhou, Chunlei;Liu, Shijia;Liu, Xi;Tian, Yunlu;Jiang, Ling;Wan, Jianmin;Zhu, Shanshan;Wang, Jian;Chen, Weiwei;Zhang, Xin;Cheng, Zhijun;Guo, Xiuping;Ren, Yulong;Zheng, Xiaoming;Wu, Chuanyin;Wan, Jianmin;Zhou, Jiawu;Li, Jing;Tao, Dayun

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）

ISSN：

年卷期： 2023 年 14 卷 1 期

页码：

收录情况： SCI

摘要： Breakdown of reproductive isolation facilitates flow of useful trait genes into crop plants from their wild relatives. Hybrid sterility, a major form of reproductive isolation exists between cultivated rice (Oryza sativa) and wild rice (O. meridionalis, Mer). Here, we report the cloning of qHMS1, a quantitative trait locus controlling hybrid male sterility between these two species. Like qHMS7, another locus we cloned previously, qHMS1 encodes a toxin-antidote system, but differs in the encoded proteins, their evolutionary origin, and action time point during pollen development. In plants heterozygous at qHMS1, similar to 50% of pollens carrying qHMS1-D (an allele from cultivated rice) are selectively killed. In plants heterozygous at both qHMS1 and qHMS7, similar to 75% pollens without co-presence of qHMS1-Mer and qHMS7-D are selectively killed, indicating that the antidotes function in a toxin-dependent manner. Our results indicate that different toxin-antidote systems provide stacked reproductive isolation for maintaining species identity and shed light on breakdown of hybrid male sterility.

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