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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年卷期:
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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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