A two-locus interaction causes interspecific hybrid weakness in rice

被引：57

作者：

Chen, Chen ^{[1
]}

Chen, Hao ^{[1
]}

Lin, You-Shun ^{[2
]}

Shen, Jin-Bo ^{[2
]}

Shan, Jun-Xiang ^{[1
]}

Qi, Peng ^{[1
]}

Shi, Min ^{[1
]}

Zhu, Mei-Zhen ^{[1
]}

Huang, Xue-Hui ^{[3
]}

Feng, Qi ^{[3
]}

Han, Bin ^{[3
]}

Jiang, Liwen ^{[2
]}

Gao, Ji-Ping ^{[1
]}

Lin, Hong-Xuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Ctr Plant Gene Res Shanghai, Shanghai Inst Plant Physiol & Ecol, Natl Key Lab Plant Mol Genet,Shanghai Inst Biol S, Shanghai 200032, Peoples R China

[2] Chinese Univ Hong Kong, Sch Life Sci, Ctr Cell & Dev Biol, Shatin, Hong Kong, Peoples R China

[3] Shanghai Inst Biol Sci, Chinese Acad Sci, Inst Plant Physiol & Ecol, Natl Ctr Gene Res, Shanghai 200233, Peoples R China

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

中国国家自然科学基金;

关键词：

ARABIDOPSIS-THALIANA; PLANT; TEMPERATURE; RESISTANCE; EXPRESSION; GENES; INCOMPATIBILITIES; IDENTIFICATION; WHEAT; SPECIATION;

D O I：

10.1038/ncomms4357

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Reproductive barriers perform a vital role during speciation. Hybrid weakness, the poorer development of hybrids compared with their parents, hinders gene exchange between different species at the postzygotic stage. Here we show that two incompatible dominant loci (Hwi1 and Hwi2) involving three genes are likely to determine the high temperature-dependent expression of hybrid weakness in interspecific hybrids of rice. Hwi1 comprises two leucine-rich repeat receptor-like kinase (LRR-RLK) genes, 25L1 and 25L2, which are specific to wild rice (Oryza rufipogon) and induce hybrid weakness. Hwi2, a rare allele that is predominantly distributed in indica rice (Oryza sativa), encodes a secreted putative subtilisin-like protease. Functional analysis indicated that pyramiding of Hwi1 and Hwi2 activates the autoimmune response in the basal nodes of hybrids, interrupting root formation and then impairing shoot growth. These findings bring new insights into our understanding of reproductive isolation and may benefit rice breeding.

引用

页数：11

共 49 条

[21] A map of rice genome variation reveals the origin of cultivated rice [J].