1. Genetic Resources Conservation Program; Division of Agriculture and Natural Resources; Univ. of California; Davis CA 95616
2. Dep. of Plant and Soil Science; Alabama A & M University; Normal AL 35762
3. USDA-ARS; North Dakota State Univ.; Fargo ND 58105
4. Dep. of Agronomy and Range Science; Univ. of California; Davis CA 95616