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- Title
Genome-wide association study dissects the genetic architecture of oil biosynthesis in maize kernels.
- Authors
Li, Hui; Peng, Zhiyu; Yang, Xiaohong; Wang, Weidong; Fu, Junjie; Wang, Jianhua; Han, Yingjia; Chai, Yuchao; Guo, Tingting; Yang, Ning; Liu, Jie; Warburton, Marilyn L; Cheng, Yanbing; Hao, Xiaomin; Zhang, Pan; Zhao, Jinyang; Liu, Yunjun; Wang, Guoying; Li, Jiansheng; Yan, Jianbing
- Abstract
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.
- Subjects
CORN seeds; CORN genetics; CORN oil; BIOSYNTHESIS; GENE expression in plants; LOCUS (Genetics); PLANT gene mapping
- Publication
Nature Genetics, 2013, Vol 45, Issue 1, p43
- ISSN
1061-4036
- Publication type
Article
- DOI
10.1038/ng.2484