1. Department of Plant Pathology, College of Agronomy, Sichuan Agricultural University, Chengdu 611130, P. R. China; and Sichuan Academy of Natural Resource and Sciences, Chengdu 610041, Sichuan, P. R. China
2. Department of Plant Pathology, College of Agronomy, Sichuan Agricultural University, Chengdu 611130, P. R. China
3. Sichuan Academy of Natural Resource and Sciences, Chengdu 610041, Sichuan, P. R. China
4. Department of Plant Pathology, College of Agronomy, Sichuan Agricultural University, Chengdu 611130, P. R. China.