1. Dep. Agronomy and Plant Genetics 1991 Buford Circle St. Paul MN 55108 USA
2. U.S. Dairy Forage Research Center Madison WI 53706 USA
3. USDA‐ARS Plant Sci. Res. Unit and Dep. Agronomy and Plant Genetics St. Paul MN 55201 USA
4. West Central Research and Education Center Morris MN 56267 USA
5. Southwest Research and Education Center Lamberton MN 56152 USA