Divergent selection and genetic introgression shape the genome landscape of heterosis in hybrid rice | Zendy

Zechuan Lin | Zendy; Peng Qin | Zendy; Xuanwen Zhang | Zendy; Chenjian Fu | Zendy; Hanchao Deng | Zendy; Xingxue Fu | Zendy; Zhen Huang | Zendy; Shuqin Jiang | Zendy; Chen Li | Zendy; Xiaoyan Tang | Zendy; Xiangfeng Wang | Zendy; Guangming He | Zendy; Yuanzhu Yang | Zendy; Hang He | Zendy; Xing Wang Deng | Zendy

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Divergent selection and genetic introgression shape the genome landscape of heterosis in hybrid rice

Author(s) -

Zechuan Lin,

Peng Qin,

Xuanwen Zhang,

Chenjian Fu,

Hanchao Deng,

Xingxue Fu,

Zhen Huang,

Shuqin Jiang,

Chen Li,

Xiaoyan Tang,

Xiangfeng Wang,

Guangming He,

Yuanzhu Yang,

Hang He,

Xing Wang Deng

Publication year - 2020

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.1919086117

Subject(s) - heterosis , biology , hybrid , introgression , japonica , genetics , genome , microbiology and biotechnology , agronomy , gene , botany

Significance The application of heterosis (hybrid vigor) in hybrid rice since the 1970s has tremendously improved rice productivity worldwide. But how breeders construct hybrid parents to obtain hybrid rice heterosis remains unclear. Here, by genome analysis, we found that breeders introduced different introgressed exogenous genomes of other rice subpopulations to construct male and female parents. The differentiated introgression in parents shaped heterotic loci in the hybrid rice. Genetic origin analysis revealed that heterotic loci existed in wild rice and were divergently selected among rice subpopulations. Our results traced the origin of heterotic loci of hybrid rice and uncovered genetic change of heterotic loci across rice evolution and breeding stages, which could facilitate the future breeding of more superior hybrid rice varieties.

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