1. Northwest A&F Univ.; National Yangling Agricultural Biotechnology & Breeding Center/Yangling Branch of State Wheat Improvement Centre/Wheat Breeding Engineering Research Center, Ministry of Education/Key Lab. of Crop Heterosis of Shaanxi Province; Yangling 712100 Shaanxi P.R. China
2. The Chinese Univ. of Hong Kong; Shatin N.T., Hong Kong P.R. China