1. USDA/ARS Plant Genetics Research Unit; University of Missouri; Columbia MO 65211 USA
2. Department of Molecular Biology, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science; Palacký University in Olomouc; Olomouc Czech Republic, 783 71
3. USDA/ARS Plant Genetics Research Unit; Donald Danforth Plant Science Center; St Louis MO 63132 USA
4. Department of Plant Agriculture; University of Guelph; Guelph ON N1G 2W1 Canada
5. USDA/ARS Midwest Area Statistician; Peoria IL 61604 USA
6. USDA/ARS Crop Genetics Research Unit; Stoneville MS 38776 USA
7. USDA/ARS Soybean and Nitrogen Fixation Research Unit; Raleigh NC 27607 USA
8. Division of Plant Sciences; University of Missouri; Columbia MO 65211 USA