1Center for Agricultural Resources Research, Institute of Genetics and Development Biology, The Chinese Academy of Sciences, No. 286 Huai-zhong Rd., Yuhua District, Shijiazhuang, Hebei Province 050021, China
2Institute of Crop Science, Chinese Academy of Agricultural Science/Key Lab. of Crop Physiology and Ecology, Ministry of Agriculture, No. 12 Zhong-guan-cun South St., Haidian District, Beijing 100081, China
3The Semi-arid Agriculture Science and Technology Research Center of China, No. 598 He-ping West Road, Xinhua District, Shijiazhuang, Hebei Province 050051, China
4Cash Crops Research Institute, Guangxi Academy of Agricultural Science, No. 174 Daxue East Road, Nanning, Guangxi Province 530007, China