1. W.-Y. Song, G.-L. Wang, L.-Y. Pi, T. Holsten, B. Wang, P. Ronald, Department of Plant Pathology, University of California, Davis, CA 95616, USA.
2. L.-L. Chen and C. Fauquet, International Laboratory for Tropical Agricultural Biotechnology/The Scripps Research Institute-Institut Francais de Recherche Scientifique et Technique pour le Developpement en Cooperation (ORSTOM), Scripps Institute, Plant Division MRC7, 10666 North Torrey Pines Road, La Jolla, CA 92037, USA.
3. H.-S. Kim and J. Gardner, Center for Engineering Plants for Resistance Against Pathogens, University of California, Davis, CA 95616, USA.
4. W.-X. Zhai and L.-H. Zhu, Institute of Genetics, Academic Sinica, Beijing, China 100101.