1. Key Laboratory of Plant Resources Institute of Botany Chinese Academy of Sciences Beijing 100093 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. College of Biological Sciences and Technology Beijing Forestry University Beijing 100083 China
4. Zhejiang Station for Management of Arable Land Quality and Fertilizer Hangzhou 310020 China
5. Sorghum Research Institute of Shanxi Agricultural University Jinzhong 030600 China