Days to heading 7, a major quantitative locus determining photoperiod sensitivity and regional adaptation in rice

文献类型： 外文期刊

第一作者： Gao, He

作者： Gao, He;Jin, Mingna;Zheng, Xiao-Ming;Chen, Jun;Zhang, Zhe;Sheng, Peike;Ma, Jin;Ma, Weiwei;Wang, Haiyang;Wu, Chuanyin;Wan, Jianmin;Gao, He;Zhou, Kunneng;Jiang, Ling;Liu, Shijia;Wan, Jianmin;Yuan, Dingyang;Xin, Yeyun;Deng, Huafeng;Yuan, Longping;Wang, Maoqing;Huang, Dongyi

作者机构：

关键词： rice;grain yield;flowering time;photoperiod sensitivity;DTH7

期刊名称：PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA （ 影响因子：11.205； 五年影响因子：12.291 ）

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收录情况： SCI

摘要： Success of modern agriculture relies heavily on breeding of crops with maximal regional adaptability and yield potentials. A major limiting factor for crop cultivation is their flowering time, which is strongly regulated by day length (photoperiod) and temperature. Here we report identification and characterization of Days to heading 7 (DTH7), a major genetic locus underlying photoperiod sensitivity and grain yield in rice. Map-based cloning reveals that DTH7 encodes a pseudo-response regulator protein and its expression is regulated by photoperiod. We show that in long days DTH7 acts downstream of the photoreceptor phytochrome B to repress the expression of Ehd1, an up-regulator of the "florigen" genes (Hd3a and RFT1), leading to delayed flowering. Further, we find that haplotype combinations of DTH7 with Grain number, plant height, and heading date 7 (Ghd7) and DTH8 correlate well with the heading date and grain yield of rice under different photoperiod conditions. Our data provide not only a macroscopic view of the genetic control of photoperiod sensitivity in rice but also a foundation for breeding of rice cultivars better adapted to the target environments using rational design.

分类号： N

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