1. Program in Genetics North Carolina State Univ. Raleigh NC 27695 USA
2. Bayer Crop Science 700 Chesterfield Pkwy W Chesterfield MO 63017 USA
3. USDA–ARS Plant Science Research Unit and Dep. of Crop and Soil Sciences, North Carolina State Univ. Raleigh NC 27695 USA
4. USDA–ARS Plant Introduction Research Unit, Iowa State Univ. Ames IA 50011 USA
5. USDA–ARS Plant Science Research Unit and Dep. of Crop and Soil Sciences and NC Plant Sciences Initiative, North Carolina State Univ. Raleigh NC 27695 USA