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

文献类型: 外文期刊

第一作者: Huang, Xuehui

作者: Huang, Xuehui;Zhao, Yan;Feng, Qi;Gong, Hao;Li, Wenjun;Zhan, Qilin;Liu, Kunyan;Zhu, Chuanrang;Huang, Tao;Zhao, Qiang;Zhang, Lei;Fan, Danlin;Zhou, Congcong;Lu, Yiqi;Weng, Qijun;Wang, Zi-Xuan;Han, Bin;Yang, Shihua;Gong, Junyi;Cheng, Benyi;Xia, Junhui;Chen, Neng;Hao, Zhongna;Li, Jiayang

作者机构:

关键词: CYTOPLASMIC MALE-STERILITY;WIDE ASSOCIATION;UNRELATED INDIVIDUALS;RESISTANCE GENES;CULTIVATED RICE;FLOWERING TIME;GRAIN WIDTH;ARABIDOPSIS;YIELD;DOMINANCE

期刊名称:NATURE COMMUNICATIONS ( 影响因子:14.919; 五年影响因子:15.805 )

ISSN:

年卷期:

页码:

收录情况: SCI

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.

分类号: N

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