1. Interdepartmental Genetics Program, USDA-ARS, Iowa State University, Ames, Iowa 50011-1020
2. Department of Plant Pathology, USDA-ARS, Iowa State University, Ames, Iowa 50011-1020
3. Corn Insects and Crop Genetics Research Unit, USDA-ARS, Iowa State University, Ames, Iowa 50011-1020
4. Sainsbury Laboratory, John Innes Centre, Norwich NR4 7UH, United Kingdom
5. Clemson University Genomics Institute, Clemson, South Carolina 29634