2Fazeli A, Hage W J, Cheng F P,et al. Acrosome-intact Boar Spermatozoa Initiate Binding to the Homologous Zona Pellucida in Vitro[J]. Biology of Reproducti on, 1997,56(2) :430-438.
3Gerrits R J,Lunney J K~lohnson L A,et al. Perspectives for Artificial Insemination and Genomics to Improve Global Swine Populations[J].Theriogenology,2005,63(2) :283-299.