1 National Genomics Data Center, Beijing Institute of Genomics, Chinese Academy of Sciences (China National Center for Bioinformation), Beijing, China.
2 College of Life Sciences, University of Chinese Academy of Sciences (UCAS), Beijing, China.
3 CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
4 College of Animal Science and Technology, China Agricultural University, Beijing, China.