1. USDA-ARS; Northern Crop Science Lab., Sunflower Research Unit; Fargo ND 58102
2. USDA-ARS; Forage and Range Research Laboratory; Logan UT 84341
3. University Of Minnesota-Twin Cities; Dep. Of- Horticultural Science; St. Paul MN 55108
4. University of Minnesota-Twin Cities; Dep. of Agronomy and Plant Genetics; St. Paul MN 55108