1. Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China;
2. College of Agronomy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia Autonomous Region 010018, P.R. China;
3. Emerging Pests and Pathogens Research Unit, Robert W. Holley Center, U.S. Department of Agriculture-Agricultural Research Service, Ithaca, NY 14853, U.S.A.; and
4. Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca, NY 14853, U.S.A.