Discussion

Weijie-Li, Xinli-Zhou, Baolin-Liu , Jianjun-Dai ,Defu-Zhang,Yi-Xu,Fukou-Lv, 1Institute of Biomedical Technology, University of Shanghai for Science and Technology, Shanghai, China, 2Animal and Veterinary Research Institute, SAAS, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai, China.