1. Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai, P.R. China
2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, P.R. China
3. NingBo Academy of Agricultural Sciences, Ningbo, P.R. China
4. Xiangshan Animal Husbandry and Veterinary General Station, Ningbo, P.R. China
5. Shantou Baisha Research Institute of Original Species of Poultry and Stock, Shantou, P.R. China