1. National Engineering Laboratory for Animal Breeding Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture College of Animal Science and Technology China Agricultural University Beijing China
2. National Engineering Research Center for Gelatin‐based Traditional Chinese Medicine Dong‐E‐E‐Jiao Co. Ltd. Done‐E Country China
3. College of Animal Science and Technology Yang Zhou University Jiangsu China
4. Laboratory of equine Production Faculty of Agriculture and Veterinary Medicine National University of Rio Cuarto Rio Cuarto Argentina
5. Institute of Research and Technology in animal reproduction Faculty of Veterinary Science University of Buenos Aires Buenos Aires Argentina