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

• DOI: 10.1073/pnas.1418204111
• Publication Date: 2014-11-07T08:42:58Z
• Authors: He Gao; Mingna Jin; Xiao-Ming Zheng; Jun Chen; Dingyang Yuan; Yeyun Xin; Maoqing Wang; Dongyi Huang; Zhe Zhang; Kunneng Zhou; Peike Sheng; Jin Ma; Weiwei Ma; Huafeng Deng; Ling Jiang; Shijia Liu; Haiyang Wang; Chuanyin Wu; Longping Yuan; Jianmin Wan
• Keywords: Adaptability

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