1. Crop Germplasm Research Unit, USDA-ARS, 2881 F & B Road, College Station, TX 77845, USA
2. Plant Science Research Unit, USDA-ARS, St. Paul, MN 55108, USA
3. Department of Agronomy, Agricultural Research Center, Kansas State University, Hays, KS 67601, USA
4. Tropical Agriculture Research Station, USDA-ARS, 2200 Pedro Albizu Campos Avenue, Mayaguez, PR 00680, USA
5. Department of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA
6. Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA