1. USDA-ARS, Crop Germplasm Research Unit, 430 Heep Center; Texas A&M Univ.; College Station TX 77843-2474
2. USDA-ARS; Grassland, Soil, and Water Res. Lab.; 808 E. Blackland Rd. Temple TX 76502
3. Texas Agric. Exp. Stn.; 3507 Hwy. 59E Beeville TX 78102