1. Dep. of AgronomyIowa State Univ.AmesIA50011
2. Martin, Dep. of Horticulture and Crop Science, OARDCOhio State Univ.ColumbusOH43210
3. Pioneer Hi‐Bred Limited#2 HW West, P.O. Box 730ChathamOntarioCanadaN7M 5L1
4. USDA‐ARS, North Central Regional Plant Introduction Station and Dep. of AgronomyIowa State Univ.AmesIA50011
5. USDA‐ARS‐FCR and Dep. of Agronomy and Dep. of Zoology/GeneticsIowa State Univ.AmesIA50011