Powdery mildew caused by Erysiphe graminis DC is a severe wheat disease in China.To breed new varieties with efficient, broadspectrum, stable resistance to the disease, the understanding of resistance mechanism is of great importance. In our research, several techniques were used such as eDNA library construction of suppression subtractive hybridization (SSH), differential hybridization screening by high density dots membrane, EST (express sequence tags) and bioinformatics methods. The objective...