1. Institute of Animal Breeding and Husbandry; Christian-Albrechts-University Kiel; D-24118 Kiel Germany
2. Institute of Animal Breeding and Genetics; University of Göttingen; D-37075 Göttingen Germany
3. Institute of Genetics; Vetsuisse Faculty; University of Bern; CH-3001 Bern Switzerland
4. Department of Animal Breeding; Faculty of Organic Agricultural Sciences; University of Kassel; D-37213 Witzenhausen Germany
5. Institute of Animal Husbandry and Animal Breeding; Farm Animal Genetics and Breeding; University of Hohenheim; D-70599 Stuttgart Germany