Chinese Acad. Sci., Inst. Subtrop. Agr., Res. Ctr Healthy Breeding Livestock and Poultry, Hunan Engn and Res. Ctr Anim. and Poultry Sci., Key Lab Agroecol. Proc. Subtrop. Reg, Furong Road #644, Changsha City, Hunan 410125, China
Department of Animal Science, Texas A and M University, College Station, TX 77843, United States
Department of Agricultural Leadership, Education and Communications, Texas A and M University, College Station, TX 77843, United States
College of Animal Science and Technology, Hunan Agricultural University, Nongda Road #1, Changsha City, Hunan 410128, China