1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
2. Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
3. Oil Palm Research Institute, Council for Scientific and Industrial Research, Kade P.O. Box 74, Ghana
4. Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Affairs, Sericulture Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China