[1]Department of Animal&Avian Sciences University of Maryland College Park MD 20742 USA;
[2]Animal Genomics and Improvement Laboratory U.S.Department of Agriculture-Agricultural Research Services Beltsville MD 20705 USA;
[3]Laboratory of Molecular Biology and Bovine Breeding Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100193 China;
[4]United States Department of Agriculture-Agriculture Research Service(ARS) Avian Disease and Oncology Laboratory East Lansing MI 48823 USA;
[5]Animal and Nutritional Sciences Davis College of Agriculture West Virginia University Morgantown WV 26506 USA;
Genetic structure; Genomic signature; Homozygosity; Marek’s disease; Recombinant Congenic Strains(RCS);