Genetic control of inflorescence architecture during rice domestication

Zuofeng Zhu, Lubin Tan, Yongcai Fu, Fengxia Liu, Hongwei Cai, Daoxin Xie, Feng Wu, Jianzhong Wu, Takashi Matsumoto and Chuanqing Sun ()
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Zuofeng Zhu: State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), China Agricultural University
Lubin Tan: State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), China Agricultural University
Yongcai Fu: State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), China Agricultural University
Fengxia Liu: State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), China Agricultural University
Hongwei Cai: State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), China Agricultural University
Daoxin Xie: Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University
Feng Wu: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Jianzhong Wu: National Institute of Agrobiological Sciences
Takashi Matsumoto: National Institute of Agrobiological Sciences
Chuanqing Sun: State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), China Agricultural University

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Inflorescence architecture is a key agronomical factor determining grain yield, and thus has been a major target of cereal crop domestication. Transition from a spread panicle typical of ancestral wild rice (Oryza rufipogon Griff.) to the compact panicle of present cultivars (O. sativa L.) was a crucial event in rice domestication. Here we show that the spread panicle architecture of wild rice is controlled by a dominant gene, OsLG1, a previously reported SBP-domain transcription factor that controls rice ligule development. Association analysis indicates that a single-nucleotide polymorphism-6 in the OsLG1 regulatory region led to a compact panicle architecture in cultivars during rice domestication. We speculate that the cis-regulatory mutation can fine-tune the spatial expression of the target gene, and that selection of cis-regulatory mutations might be an efficient strategy for crop domestication.

Date: 2013
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DOI: 10.1038/ncomms3200

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