[1] Friedrich Loeffler Inst, Inst Farm Anim Genet, D-31535 Neustadt, Germany
[2] Univ Utrecht, Fac Vet Med, Dept Immunol & Infect Dis, NL-3584 CM Utrecht, Netherlands
[3] CRV, Anim Evaluat Unit, NL-6800 AL Arnhem, Netherlands
[4] Univ Politecn Madrid, Dept Anim Prod, ETS Ingenieros Agronomos, E-28040 Madrid, Spain
[5] Food & Agr Org United Nations, Anim Prod & Hlth Div, I-00153 Rome, Italy
[6] Univ Cattolica Sacro Cuore, Fac Agr, Ist Zootecn, I-29122 Piacenza, Italy
[7] Trinity Coll Dublin, Smurfit Inst Genet, Dublin 2, Ireland
[8] Chinese Acad Agr Sci, Inst Anim Sci, CAAS ILRI Joint Lab Livestock & Forage Genet Reso, Beijing 1000193, Peoples R China