A rare variation in the promoter of qRBG1/OsBZR5 is associated with larger rice grains. OsBZR5 is found to negatively regulate grain size in rice, a biological role opposite to other OsBZR members. A regulatory module of OsGSK2–qRBG1–OsBZR1–D2–OFP1 is further revealed.
- Qiuli Zhang
- Renhong Wu
- Fangming Zhao
