1. College of Agronomy; Nanjing Agricultural Univ., Nanjing 210095, Jiangsu and Crop Research Institute of Tianjin; Tianjin 300112 People's Republic of China
2. College of Life Science; Nanjing Agricultural Univ.; Nanjing 210095 Jiangsu People's Republic of China
3. Cotton Research Institute of Hunan; Changde 415101 Hunan People's Republic of China
4. College of Agronomy; Nanjing Agricultural Univ.; Nanjing 210095 Jiangsu People's Republic of China