1. Dep. of Field CropsTekirdag Agric. FacultyUniv. of Trakya Tekirdag Turkey
2. USDA‐ARSWheat, Sorghum, and Forages Res. Unit, 344 Keim HallUniv. of Nebraska P.O. Box 830937 Lincoln NE 68507‐0937
3. Dep. of Crop and Soil Sci.Washington State Univ. Pullman WA 99164‐6420
4. Flow and Image Cytometry Core LaboratoriesBenaroya Research Inst. at Virginia Mason 1201 Ninth Ave. Seattle WA 98101