Genome-wide association study dissects the genetic architecture of oil biosynthesis in maize kernels

文献类型： 外文期刊

第一作者： Li, Hui

作者： Li, Hui;Yang, Xiaohong;Wang, Weidong;Wang, Jianhua;Han, Yingjia;Chai, Yuchao;Guo, Tingting;Hao, Xiaomin;Zhang, Pan;Li, Jiansheng;Peng, Zhiyu;Cheng, Yanbing;Zhao, Jinyang;Fu, Junjie;Liu, Yunjun;Wang, Guoying;Yang, Ning;Liu, Jie;Yan, Jianbing;Warburton, Marilyn L.

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期刊名称：NATURE GENETICS （ 影响因子：38.33； 五年影响因子：36.431 ）

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收录情况： SCI

摘要： Maize kernel oil is a valuable source of nutrition. Here we extensively examine the genetic architecture of maize oil biosynthesis in a genome-wide association study using 1.03 million SNPs characterized in 368 maize inbred lines, including 'high-oil' lines. We identified 74 loci significantly associated with kernel oil concentration and fatty acid composition (P < 1.8 × 10 -6), which we subsequently examined using expression quantitative trait loci (QTL) mapping, linkage mapping and coexpression analysis. More than half of the identified loci localized in mapped QTL intervals, and one-third of the candidate genes were annotated as enzymes in the oil metabolic pathway. The 26 loci associated with oil concentration could explain up to 83% of the phenotypic variation using a simple additive model. Our results provide insights into the genetic basis of oil biosynthesis in maize kernels and may facilitate marker-based breeding for oil quantity and quality.

分类号： R394

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