1. Department of Horticulture, University of Arkansas, Fayetteville, AR 72701, USA
2. Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR 72701, USA
3. The United States Department of Agriculture—Agricultural Research Service (USDA-ARS), Plant Genetic Resources Unit, 630 West North Street, Geneva, NY 14456, USA
4. USDA-ARS, 2700 Savannah Highway, Charleston, SC 29414, USA