1. Department of Plant Pathology; College of Plant Protection, China Agricultural University; Beijing 100193 People's Republic of China
2. Department of Pesticides; College of Plant Protection, Shandong Agricultural University; Tai'an 271000 People's Republic of China
3. Center for Genome Research and Biocomputing and Department of Botany and Plant Pathology; Oregon State University; Corvallis OR 97331 USA