1. College of Animal Science and Technology, Innovation Experimental College, Northwest A&F University, Xi'an, Shaanxi, China
2. College of Animal Science and Technology, Northwest A&F University, Xi'an, Shaanxi, China
3. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
4. Science Experimental Center, College of Life Science and Engineering, Northwest University for Nationalities, Chengguan District, Lanzhou City in northwest, Lanzhou, Gansu, China