1. Clemson University, Pee Dee Research and Education Center, Florence, SC 29501, USA
2. North Carolina State University, Crop Science Department, Raleigh, NC 27695, USA
3. USDA-ARS, Genomics and Bioinformatics Research Unit, Raleigh, NC 27695, USA
4. USDA-ARS, Coastal Plains, Soil, Water, and Plant Research Center, Florence, SC 29501, USA