Letter abstract

Nature Genetics 40, 1360 - 1364 (2008)
Published online: 28 September 2008 | doi:10.1038/ng.197

Control of a key transition from prostrate to erect growth in rice domestication

Lubin Tan1, Xianran Li1, Fengxia Liu1, Xianyou Sun1, Chenggang Li1, Zuofeng Zhu1, Yongcai Fu1, Hongwei Cai1, Xiangkun Wang1, Daoxin Xie2 & Chuanqing Sun1


The transition from the prostrate growth of ancestral wild rice (O. rufipogon Griff.) to the erect growth of Oryza sativa cultivars was one of the most critical events in rice domestication. This evolutionary step importantly improved plant architecture and increased grain yield. Here we find that prostrate growth of wild rice from Yuanjiang County in China is controlled by a semi-dominant gene, PROG1 (PROSTRATE GROWTH 1), on chromosome 7 that encodes a single Cys2-His2 zinc-finger protein. prog1 variants identified in O. sativa disrupt the prog1 function and inactivate prog1 expression, leading to erect growth, greater grain number and higher grain yield in cultivated rice. Sequence comparison shows that 182 varieties of cultivated rice, including 87 indica and 95 japonica cultivars from 17 countries, carry identical mutations in the prog1 coding region that may have become fixed during rice domestication.

  1. State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100094, China.
  2. MOE Key Laboratory of Bioinformatics, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing, 100084, China.

Correspondence to: Chuanqing Sun1 e-mail: suncq@cau.edu.cn

Correspondence to: Daoxin Xie2 e-mail: daoxin@tsinghua.edu.cn


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