Wubei Zong, Yingang Song, Dongdong Xiao, Xiaotong Guo, Fuquan Li, Kangli Sun, Wenjing Tang, Wenhao Xie, Yanqiu Luo, Shan Liang, Jingyao Zhou, Xianrong Xie, Dilin Liu, Letian Chen, Haiyang Wang, Yao-Guang Liu, Jingxin Guo
Rice (Oryza sativa L.) is a short-day plant whose heading date is largely determined by photoperiod sensitivity (PS). Many parental lines used in hybrid rice breeding have weak PS, but their F1 progenies have strong PS and exhibit an undesirable transgressive late-maturing phenotype. However, the genetic basis for this phenomenon is unclear. Therefore, effective methods are needed for selecting parents to create F1 hybrid varieties with the desired PS. In this study, we used bulked segregant analysis with F1 Ningyou 1179 (strong PS) and its F2 population, and through analyzing both parental haplotypes and PS data for 918 hybrid rice varieties, to identify the genetic basis of transgressive late maturation which is dependent on dominance complementation effects of Hd1, Ghd7, DTH8, and PRR37 from both parents rather than from a single parental genotype...
March 25, 2024: Plant Journal