1. College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, P. R. China
2. Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, Chongqing Science and Technology Bureau,Chongqing, P. R. China
3. State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, P. R. China