1. Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
2. Key Laboratory of Herbage and Endemic Crop Biotechnology, School of Life Sciences, Inner Mongolia University, Hohhot, People’s Republic of China
3. Citrus Research Institute, Southwest University, Chongqing, People’s Republic of China
4. Key Laboratory for Northern Urban Agriculture of Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing, People’s Republic of China