1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
2. Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Gansu Agricultural University, Lanzhou, China
3. Nongfayuan (Zhejiang) Agricultural Development Co., Ltd., Huzhou, Zhejiang, China
4. Sheep Breeding Biotechnology Engineering Laboratory of Gansu Province, Minqin, China