1. USDA‐ARS, Wheat, Sorghum, and Forage Res. Unit344 Keim Hall, Univ. of Nebraska, P.O. Box 830937LincolnNE68507‐0937
2. Center for Biotechnology, N322 Beadle HallUniv. of NebraskaLincolnNE68516
3. USDA‐ARS, Forage and Range Res. Lab.Utah State Univ.LoganUT84322‐6300