1. Hunan Rice Research Institute, Hunan Academy of Agricultural Science, Changsha, China;
2. Ministry of Agriculture, Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley, Changsha, China;
3. College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China;
4. State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China