1. Department of Crop, Soil, and Environmental Sciences University of Arkansas Fayetteville Arkansas 72701 USA
2. Fisher Delta Research, Extension, and Education Center University of Missouri Portageville Missouri 63873 USA
3. Department of Plant Sciences North Dakota State University Fargo North Dakota 58102 USA
4. Arkansas Crop Improvement Program University of Arkansas System – Division of Agriculture Fayetteville Arkansas 72701 USA
5. Plant Science & Technology University of Missouri Columbia Missouri 65201 USA