1. Department of Animal Production; Federal University of Rio Grande do Sul; Porto Alegre Brazil
2. School of Veterinary Medicine; Federal University of Pará; Castanhal Brazil
3. Brazilian Agricultural Research Corporation - Embrapa; Southern Region Animal Husbandry; Bagé Brazil
4. Doctor in Animal Breeding; PROMEBO; Beef Cattle of Improvement Program; Pelotas Brazil
5. College of Agronomy and Veterinary Medicine; University of Brasília; Distrito Federal Brasília Brazil