1. Tropical Animal Science Unit, INRA UR 143, French National Institute for Agricultural Research, 97170 Petit-Bourg, Guadeloupe, French West Indies
2. Animal Genetics and Integrative Biology, INRA UMR 1313, French National Institute for Agricultural Research, FR-78352 Jouy-en-Josas, France
3. Animal Breeding and Genetics Group, Wageningen University, NL-6709 PG Wageningen, The Netherlands