1. Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China
2. Dairy Science Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
3. Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning 530001, China
4. College of Animal Science and Technology, Guangxi University, Nanning 530004, China