1. Plant Genetics Research Unit, U. S. Department of Agriculture–Agricultural Research Service, Columbia, Missouri 65211
2. Division of Biological Sciences, University of Missouri, Columbia, Missouri 65211
3. Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211
4. Center for Integrated Breeding Research, University of Göttingen, 37075, Germany
5. Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, 30559, Germany
6. H&N International, 27472 Cuxhaven, Germany
7. Institute for Animal Breeding, Bavarian State Research Centre for Agriculture, 85586 Grub, Germany