Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, P.R.China;
Colege of Bee Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R.China;
Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, P.R.China;
Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, P.R.China;
Colege of Bee Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R.China;
Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, P.R.China;