1. Universidade Federal de Viçosa, Animal Science Department, 36570-000, Viçosa-MG, Brazil
2. Topigs Norsvin Research Center B.V., P.O. Box 43, 6640 AA Beuningen, the Netherlands
3. Topigs Norsvin, 80420-210, Curitiba-PR, Brazil
4. Wageningen University & Research, Animal Breeding and Genomics, P.O. Box 338 6700 AH, Wageningen, the Netherlands