1. Laboratory
of Animal Embryonic Biotechnology, National Engineering Laboratory
for Animal Breeding,l Key Laboratory of Animal Genetics, Breeding,
and Reproduction of the Ministry of Agriculture, College of Animal
Science and Technology, China Agricultural University, Beijing 100094, China
2. Institute
of Animal Sciences, China Academy of Agricultural Sciences, Beijing 100293, China
3. College
of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China