1. State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University , No. 1 Weigang, Nanjing, Jiangsu 210095 , China
2. Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences , No. 50 Zhongling, Nanjing, Jiangsu 210014 , China