1. University of Michigan, Department of Ecology and Evolutionary Biology, Ann Arbor, Michigan, USA
2. University of California—Riverside, Department of Microbiology and Plant Pathology, Riverside, California, USA
3. University of Seville, Department of Genetics, Seville, Spain
4. Michigan State University, Department of Plant Soil and Microbial Sciences, East Lansing, Michigan, USA
5. University of Maine, School of Biology and Ecology, Orono, Maine, USA
6. Oregon State University, Department of Botany and Plant Pathology, Corvalis, Oregon, USA
7. L. F. Lambert Spawn Co., Coatesville, Pennsylvania, USA
8. U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
9. University of California—Berkeley, Department of Plant and Microbial Biology, Berkeley, California, USA