[1] Univ Turin, Dept Agr Forest & Food Sci, Largo Paolo Braccini 2, Grugliasco, TO, Italy
[2] Justus Liebig Univ Giessen, Inst Anim Breeding & Genet, Ludwigstr 21b, Giessen, Germany
[3] Georg August Univ, Dept Anim Sci Biotechnol & Reprod Livestock, Burckhardtweg 2, Gottingen, Germany