1. Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A.
2. Genome Informatics Facility, Iowa State University, Ames, IA 50011, U.S.A.
3. Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, U.S.A.
4. Department of Plant Pathology and Institute of Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA 30602, U.S.A.