Natural variation at the DEP1 locus enhances grain yield in rice

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.

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