Institution: | (1) USDA-ARS-Plant Science Research Unit, USA;(2) Present address: Department of Plant Pathology, University of Minnesota, 495 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN 55108, USA;(3) USDA-ARS-Soybean and Alfalfa Research Lab, Beltsville, MD 20705, USA |