1. College of Horticulture Sichuan Agricultural University Chengdu Sichuan China
2. Institute of Horticulture Chengdu Academy of Agriculture and Forestry Sciences Chengdu Sichuan China
3. Department of Plant Pathology Washington State University Pullman WA USA
4. Institute of Pomology and Olericulture Sichuan Agricultural University Chengdu Sichuan China