Xiaorong Huang1, Mengmeng Run1, Meng-Xiang Sun2. 1. College of Life Science, State Key Laboratory of Hybrid Rice, Wuhan University, Wuhan, 430072, China. 2. College of Life Science, State Key Laboratory of Hybrid Rice, Wuhan University, Wuhan, 430072, China. Electronic address: mxsun@whu.edu.cn.