Genetic control of inflorescence architecture during rice domestication

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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, Os LG1, 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. © 2013 Macmillan Publishers Limited. All rights reserved.

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Zhu, Z., Tan, L., Fu, Y., Liu, F., Cai, H., Xie, D., … Sun, C. (2013). Genetic control of inflorescence architecture during rice domestication. Nature Communications, 4. https://doi.org/10.1038/ncomms3200

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