1. State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research Institute, Sichuan Agricultural University Chengdu 611130 China
2. College of AgronomySichuan Agricultural University Chengdu 611130 China
3. State Key Laboratory of Rice BiologyBiotechnology Institute, Zhejiang University Hangzhou 310058 China
4. Collaborative Innovation Center for Hybrid Rice in Yangtze River BasinSichuan Agricultural University Chengdu 611130 China