ACKNOWLEDGEMENTS
We thanked Anhui Domestic Donkey Conservation and Breeding for providing samples. The authors thank the anonymous referees for their valuable comments and suggestions on the manuscript. This study was supported by the projects Program for Young Outstanding Scientists of University (gxyqZD2022017); Anhui Poultry-Industry Technology Research System (AHCYJSTX-06-10); Municipal Science and Technology Cooperation Project (KJ2021564); Municipal Science and Technology Cooperation Project (KJ20200323); The Science and Technology Major Project of Anhui Province(201903a06020018).