Affiliation: | 1. Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11-222, Palmerston North 5301, New Zealand;2. Departamento de Produccion Animal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2805, (3080) Esperanza, Argentina;3. Instituto Nacional de Tecnología Agropecuaria (INTA), AIPA, Ruta 34 Km 227, (2300) Rafaela, Santa Fe, Argentina;4. DairyNZ, Private Bag 3221, Hamilton 3240, New Zealand |