1. College of Plant Protection/Citrus Research Institute of Southwest University, Chongqing 400715, P. R. China, USDA-ARS Molecular Plant Pathology Laboratory, Beltsville, MD
2. USDA-ARS Molecular Plant Pathology Laboratory, Beltsville, MD
3. Citrus Research Institute, Southwest University, Chongqing 400715, P. R. China