1. Centre for Genetic Improvement of Livestock, Department of Animal Biosciences University of Guelph Guelph ONN1G 2W1Canada
2. Departament de Ciència Animal i dels Aliments Universitat Autònoma de Barcelona Bellaterra08193Spain
3. Hybrid Turkeys C‐650 Riverbend Drive, Suite C Kitchener ONN2K 3S2Canada
4. School of Veterinary Science University of Queensland Gatton Qld4343Australia
5. Institute of Genetics, Vetsuisse Faculty University of Bern Bern3001Switzerland