Affiliation: | 1. Faculty of Veterinary and Livestock University Center, Autonomous University of the State of Mexico, Amecameca 56900, Mexico 2. Department of Animal Production, Chapingo Autonomous University, Chapingo 56230, Mexico 3. Department of Agriculture and Livestock, Metropolitan Autonomous University Xochimilco Unit, Mexico City 04960, Mexico 4. Institute of Genetic and Productivity Livestock Center, Postgraduate Col ege, Montecil o 56230, Mexico |