1. USDA-ARS; Plant Stress and Germplasm Development Unit, Cropping Systems Research Lab.; Lubbock TX 79415
2. USDA-ARS; Crop Germplasm Research Unit, Southern Plains Agricultural Research Center; College Station TX 77845
3. Dep. of Horticulture and Institute for Plant Genomics and Biotechnology; Texas A&M Univ.; College Station TX 77843
4. USDA-ARS; Plant Genetic Resource and Conservation Unit; Griffin GA 30223