[1] Univ Republica, Fac Agron, Dept Prod Anim & Pasturas, Av Garzon 780, Montevideo, Uruguay
[2] Univ Clermont Auvergne, INRAE, VetAgro Sup, UMRH, F-63122 St Genes Champanelle, France
[3] Inst Nacl Invest Agr, Programa Prod Leche Estn Expt INIA Estanzuela, Ruta 50,Km 11, Semillero 39173, Uruguay