1. Dep. of Plant Pathology Univ. of Minnesota St. Paul Minnesota 55108 USA
2. Ethiopian Institute of Agricultural Research Addis Ababa Ethiopia
3. CIMMYT‐Ethiopia Addis Ababa Ethiopia
4. USDA‐Agricultural Research Service Small Grains and Potato Germplasm Research Unit Aberdeen Idaho 83210 USA
5. USDA‐Agricultural Research Service Cereal Disease Lab St. Paul Minnesota 55108 USA