1. Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, P. R. China
2. School of Agricultural Sciences, Zhengzhou University, Kexue Avenue 100, Zhengzhou 450001, P. R. China
3. Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences, 437 Dongguan Street, Baoding 071000, P. R. China
4. Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, 7 Pengfei Road, Shenzhen 518124, P. R. China