Affiliation: | 1、Jiangsu Province Key Laboratory of Animal Breeding and Molecular Design, College of Animal Science and Technology,Yangzhou University, Yangzhou 225009, P.R.China2、Animal & Avian Sciences, University of Maryland, Washington, D.C. MD20741, USA3、Department of Anatomy and Embryology, College of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt |