1. International Potato Center (CIP); Apartado 1558 Lima 12 Peru
2. Univ. of Florida; North Florida Research & Education Center; Marianna FL 32446
3. Univ. of Florida; North Florida Res. & Education Center; Marianna FL 32446
4. Key Lab. of Aridland Crop Science; Crop Genetic & Germplasm Enhancement Agronomy College Gansu Agricultural Univ.; Lanzhou 730070 China
5. Univ. of Florida; Dep. of Agronomy; Gainesville FL 32611