College of Biotechnology and Environmental Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P.R.China;
Key Laboratory of Silkworm and Mulberry Genetic Improvement Ministry of Agriculture of China/Sericultural Research Institute Chi;
Key Laboratory of Silkworm and Mulberry Genetic Improvement Ministry of Agriculture of China/Sericultural Research Institute Chinese Academy of Agricultural Sciences Zhenjiang 212018 P.R.China;