An asymmetric allelic interaction drives allele transmission bias in interspecific rice hybrids
文献类型： 外文期刊
作者： Xie, Yongyao 1 ; Tang, Jintao 1 ; Xie, Xianrong 1 ; Li, Xiaojuan 1 ; Huang, Jianle 1 ; Fei, Yue 1 ; Han, Jingluan 1 ; Che 1 ;
作者机构： 1.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Guangdong, Peoples R China
2.South China Agr Univ, Guangdong Prov Key Lab Prot Funct & Regulat Agr O, Guangzhou 510642, Guangdong, Peoples R China
3.South China Agr Univ, Key Lab Plant Funct Genom & Biotechnol Guangdong, Guangzhou 510642, Guangdong, Peoples R China
4.South China Agr Univ, Coll Life Sci, Guangzhou 510642, Guangdong, Peoples R China
5.Yunnan Acad Agr Sci, Food Crops Res Inst, Kunming 650200, Yunnan, Peoples R China
6.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Kunming 650200, Yunnan, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）
ISSN： 2041-1723
年卷期： 2019 年 10 卷
页码：
收录情况： SCI
摘要： Hybrid sterility (HS) between Oryza sativa (Asian rice) and O. glaberrima (African rice) is mainly controlled by the S1 locus. However, our limited understanding of the HS mechanism hampers utilization of the strong interspecific heterosis. Here, we show that three closely linked genes (S1A4, S1TPR, and S1A6) in the African S1 allele (S1-g) constitute a killer-protector system that eliminates gametes carrying the Asian allele (S1-s). In Asian-African rice hybrids (S1-gS1-s), the S1TPR-S1A4-S1A6 interaction in sporophytic tissues generates an abortion signal to male and female gametes. However, S1TPR can rescue S1-g gametes, while the S1-s gametes selectively abort for lacking S1TPR. Knockout of any of the S1-g genes eliminates the HS. Evolutionary analysis suggests that S1 may have arisen from newly evolved genes, multi-step recombination, and nucleotide variations. Our findings will help to overcome the interspecific reproductive barrier and use Asian-African hybrids for increasing rice production.
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