1. Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
2. Shenyang Agricultural University, Key Laboratory of Crop Physiology, Ecology, Genetics and Breeding, Ministry of Agriculture, Shenyang 110161, China.
3. International Rice Research Institute, DAPO Box 7777, Metro Manila, the Philippines.