1. Forage and Range Research Laboratory, USDA-ARS, Utah State University, 695 N.1100 E., Logan, Utah 84322-6300, Center for Applied Genetic Technologies, University of Georgia, Athens, Georgia 30602, National Center for Agricultural Utilization Research, USDA-ARS New Crop Research Unit, Peoria, Illinois 61604, Brunswick Laboratories, 6 Thatcher Lane, Wareham, Massachusetts 02571, and Department of Crop and Soil Science, Oregon State University, Corvallis, Oregon 97331