1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
2. Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310058, China
3. Sericultural and Apicultural Institute, Yunnan Academy of Agricultural Sciences, Mengzi 661101, China
4. Jinzhong Bee Breeding Apiary, Jinzhong 030600, China
5. Mudanjiang Branch of Heilongjiang Academy of Agricultural Sciences, Mudanjiang 157041, China
6. Apiculture Science Institute of Jilin Province, Jilin 132108, China