[1] Univ Clermont Auvergne, AgroParisTech, INRA, Irstea,VetAgro Sup,UMR Terr, F-630170 Aubiere, France
[2] Inst Elevage, 2 Pl Pierre Viala, F-34060 Montpellier 2, France
[3] Fac Agron EEFAS UdelaR, Ruta 31,Km 21,5, Salto, Uruguay
[4] Emater, Curitiba, Parana, Brazil
[5] Fac Vet IPAV UdelaR, Ruta 1,Km 42,5, Libertad, San Jose, Uruguay
[6] Rudec Ipsard, 16 Thuy Khue, Hanoi, Vietnam
[7] Inst Elevage, 9 Allee Pierre de Fermat, F-63170 Aubiere, France
[8] Hassan II Agron & Vet Med Inst, POB 6202, Rabat, Morocco
[9] Ctr Wallon Rech Agron, 8 Rue Liroux, B-5030 Gembloux, Belgium
[10] INRA, Dept SAD, F-63122 St Genes Champanelle, France