1. Plant Biology Graduate Group and Genome Center, University of California, Davis, Davis, California 95616
2. International Potato Center (CIP), Lima 15024, Peru
3. Integrative Genetics and Genomics Graduate Group, University of California, Davis, California 95616
4. Duquesa Business Centre, Malaga 29692, Spain
5. Plant Pathology and Plant-Microbe Biology Section, Cornell University, Geneva, New York 14456
6. School of Biology and Ecology, University of Maine, Orono, Maine 04469