Genetic dissection of yield traits in super hybrid rice Xieyou9308 using both unconditional and conditional genome-wide association mapping

文献类型： 外文期刊

第一作者： Zhang, Yingxin

作者： Zhang, Yingxin;Shen, Xihong;Chen, Daibo;Wu, Weixun;Zhan, Xiaodeng;Liu, Qunen;Zhu, Aike;Cheng, Shihua;Cao, Liyong;Zhang, Yingxin;Shen, Xihong;Chen, Daibo;Wu, Weixun;Zhan, Xiaodeng;Liu, Qunen;Zhu, Aike;Cheng, Shihua;Cao, Liyong;Zhou, Liyuan;Xu, Haiming;Zhou, Liyuan;Xu, Haiming;Zhou, Liyuan;Lou, Xiangyang

作者机构：

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2017 年 7 卷

页码：

收录情况： SCI

摘要： With the development and application of super rice breeding, elite rice hybrids with super high-yielding potential have been widely developed in last decades in China. Xieyou9308 is one of the most famous super hybrid rice varieties. To uncover the genetic mechanism of Xieyou9308's high yield potential, a recombinant inbred line (RIL) population derived from cross of XieqingzaoB and Zhonghui9308 was re-sequenced and investigated on the grain yield (GYD) and its three component traits, number of panicles per plant (NP), number of filled grains per panicle (NFGP), and grain weight (GW). Unconditional and conditional genome-wide association analysis, based on a linear mixed model with epistasis and gene-environment interaction effects, were conducted, using similar to 0.7 million identified SNPs. There were six, four, seven, and seven QTSs identified for GYD, NP, NFGP, and GW, respectively, with accumulated explanatory heritability varying from 43.06% to 48.36%; additive by environment interactions were detected for GYD, some minor epistases were detected for NP and NFGP. Further, conditional genetic mapping analysis for GYD given its three components revealed several novel QTSs associated with yield than that were suppressed in our unconditional mapping analysis.

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