Lanzhou Institute of Animal Science and Veterinary Medicine,Chinese Academy of Agriculture SciencesLIASVM/CAAS, Lanzhou, Gansu 730050, Peoplés Republic of China;
Food and Animal Science Department, Northwest College for Nationalities,Lanzhou,Gansu 730050,Peoplés Republic of China;
Lanzhou Institute of Animal Science and Veterinary Medicine,Chinese Academy of Agriculture SciencesLIASVM/CAAS, Lanzhou, Gansu 730050, Peoplés Republic of China;
Histology; Lactate dehydragenase; Testes; Ultrastructure; Yaks;