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Two complementary genes in a presence-absence variation contribute to indica-japonica reproductive isolation in rice

文献类型： 外文期刊

作者： Wang, Daiqi 1 ; Wang, Hongru 5 ; Xu, Xiaomei 1 ; Wang, Man 1 ; Wang, Yahuan 1 ; Chen, Hong 1 ; Ping, Fei 1 ; Zhong, Huanhuan 1 ; Mu, Zhengkun 1 ; Xie, Wantong 1 ; Li, Xiangyu 1 ; Feng, Jingbin 1 ; Zhang, Milan 1 ; Fan, Zhilan 6 ; Yang, Tifeng 7 ; Zhao, Junliang 7 ; Liu, Bin 7 ; Ruan, Ying 3 ; Zhang, Guiquan 1 ; Liu, Chunlin 3 ; Liu, Ziqiang 1 ;

作者机构： 1.South China Agr Univ, Coll Agr, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou 510642, Guangdong, Peoples R China

2.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangzhou 510642, Guangdong, Peoples R China

3.Hunan Agr Univ, Key Lab Hunan Prov Crop Epigenet Regulat & Dev, Changsha 410128, Hunan, Peoples R China

4.Hunan Agr Univ, Coll Agron, Changsha 410128, Hunan, Peoples R China

5.Chinese Acad Agr Sci, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr, Genome Anal Lab Minist Agr & Rural Affairs, Shenzhen 518120, Guangdong, Peoples R China

6.Guangdong Acad Agr Sci, Rice Res Inst, Natl Field Genebank Wild Rice Guangzhou, Guangzhou 510640, Guangdong, Peoples R China

7.Guangdong Acad Agr Sci, Rice Res Inst, Guangdong Prov Key Lab New Technol Rice Breeding, Guangzhou 510640, Guangdong, Peoples R China

8.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China

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： Understanding the evolutionary forces in speciation is a central goal in evolutionary biology. Asian cultivated rice has two subspecies, indica and japonica, but the underlying mechanism of the partial reproductive isolation between them remains obscure. Here we show a presence-absence variation (PAV) at the Se locus functions as an indica-japonica reproductive barrier by causing hybrid sterility (HS) in indica-japonica crosses. The locus comprises two adjacent genes: ORF3 encodes a sporophytic pollen killer, whereas ORF4 protects pollen in a gametophytic manner. In F-1 of indica-japonica crosses, pollen with the japonica haplotype, which lacks the sequence containing the protective ORF4, is aborted due to the pollen-killing effect of ORF3 from indica. Evolutionary analysis suggests ORF3 is a gene associated with the Asian cultivated rice species complex, and the PAV has contributed to the reproductive isolation between the two subspecies of Asian cultivated rice. Our analyses provide perspectives on rice inter-subspecies post-zygotic isolation, and will promote efforts to overcome reproductive barriers in indica-japonica hybrid rice breeding. The mechanisms of the partial reproductive isolation between the two subspecies of rice remains obscure. Here, the authors show that the two adjacent genes form a killer-protector system to induce hybrid male sterility and reproductive isolation between indica and japonica.

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