[1] Huazhong Cent China Agr Univ, Coll Anim Sci & Technol, Key Lab Agr Anim Genet Breeding & Reprod, Minist Educ,Minist Agr,Key Lab Swine Genet & Bree, Wuhan 430070, Hubei, Peoples R China
[2] Michigan State Univ, Dept Anim Sci, E Lansing, MI 48824 USA
[3] Huazhong Agr Univ, Coll Anim Sci & Technol, China Educ Minist, Key Lab Agr Anim Genet Breeding & Reprod, Wuhan 430070, Peoples R China