Genomic analysis of hybrid rice varieties reveals numerous superior alleles that contribute to heterosis

被引：297

作者：

Huang, Xuehui ^{[1
]}

Yang, Shihua ^{[2
]}

Gong, Junyi ^{[2
]}

Zhao, Yan ^{[1
]}

Feng, Qi ^{[1
]}

Gong, Hao ^{[1
]}

Li, Wenjun ^{[1
]}

Zhan, Qilin ^{[1
]}

Cheng, Benyi ^{[2
]}

Xia, Junhui ^{[2
]}

Chen, Neng ^{[2
]}

Hao, Zhongna ^{[3
]}

Liu, Kunyan ^{[1
]}

Zhu, Chuanrang ^{[1
]}

Huang, Tao ^{[1
]}

Zhao, Qiang ^{[1
]}

Zhang, Lei ^{[1
]}

Fan, Danlin ^{[1
]}

Zhou, Congcong ^{[1
]}

Lu, Yiqi ^{[1
]}

Weng, Qijun ^{[1
]}

Wang, Zi-Xuan ^{[1
]}

Li, Jiayang ^{[4
]}

Han, Bin ^{[1
]}

机构：

[1] Chinese Acad Sci, Collaborat Innovat Ctr Genet & Dev, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol,Natl Ctr Gene Res, Shanghai 200233, Peoples R China

[2] Chinese Acad Agr Sci, China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Zhejiang, Peoples R China

[3] Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, Hangzhou 310021, Zhejiang, Peoples R China

[4] Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, Natl Ctr Plant Gene Res, Beijing 100101, Peoples R China

来源：

NATURE COMMUNICATIONS | 2015年 / 6卷

基金：

中国国家自然科学基金;

关键词：

CYTOPLASMIC MALE-STERILITY; FLOWERING TIME; GRAIN WIDTH; GENE; ARABIDOPSIS; RESISTANCE; YIELD; DOMINANCE; ENCODES; TRAITS;

D O I：

10.1038/ncomms7258

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：

Exploitation of heterosis is one of the most important applications of genetics in agriculture. However, the genetic mechanisms of heterosis are only partly understood, and a global view of heterosis from a representative number of hybrid combinations is lacking. Here we develop an integrated genomic approach to construct a genome map for 1,495 elite hybrid rice varieties and their inbred parental lines. We investigate 38 agronomic traits and identify 130 associated loci. In-depth analyses of the effects of heterozygous genotypes reveal that there are only a few loci with strong overdominance effects in hybrids, but a strong correlation is observed between the yield and the number of superior alleles. While most parental inbred lines have only a small number of superior alleles, high-yielding hybrid varieties have several. We conclude that the accumulation of numerous rare superior alleles with positive dominance is an important contributor to the heterotic phenomena.

引用

页数：9

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