[1] China Agr Univ, Dept Plant Pathol, Beijing 100094, Peoples R China
[2] China Agr Univ, State Key Lab Agrobiotechnol, Beijing 100094, Peoples R China
[3] Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100193, Peoples R China
[4] Univ Alaska, Agr & Forestry Expt Stn, Plant Pathol & Biotechnol Lab, Fairbanks, AK 99701 USA