Natural variation at the DEP1 locus enhances grain yield in rice

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Xianzhong Huang, Qian Qian, Zhengbin Liu, Hongying Sun, Shuyuan He, Da Luo, Guangmin Xia, Chengcai Chu, Jiayang Li, Xiangdong Fu
Nature Genetics, 2009, 41(4): 494-497  DOI: 10.1038/ng.352;      追溯原文......本站官方QQ群:62473826

Grain yield is controlled by quantitative trait loci (QTLs) derived from natural variations in many crop plants. Here we report the molecular characterization of a major rice grain yield QTL that acts through the determination of panicle architecture. The dominant allele at the DEP1 locus is a gain-of-function mutation causing truncation of a phosphatidylethanolamine-binding protein-like domain protein. The effect of this allele is to enhance meristematic activity, resulting in a reduced length of the inflorescence internode, an increased number of grains per panicle and a consequent increase in grain yield. This allele is common to many Chinese high-yielding rice varieties and likely represents a relatively recent introduction into the cultivated rice gene pool. We also show that a functionally equivalent allele is present in the temperate cereals and seems to have arisen before the divergence of the wheat and barley lineages.


基因列表
  G蛋白γ亚基; 直立型密穗基因; 直立穗基因 DEP1; DN1; qPE9-1; qNGR9