1. Genetics Area Program Univ. of Missouri‐Columbia Columbia MO 65211
2. Richard B. Russell Research Center Univ. of Georgia Athens GA 31793
3. Biological Sciences Unit Univ. of Missouri‐Columbia Columbia MO 65211
4. USDA‐ARS National Center for Agricultural Utilization Research Peoria IL 61604
5. USDA‐ARS, Plant Genetics Research Unit, and Plant Science Unit Univ. of Missouri Columbia MO 65211