In order to solve the problems existed in wheat transient expression system,such as low efficiency,poor stability and uneven bombardment,in this study,the transient expression system in wheat leaf has been optimized using GFPand GUSas reporter genes and the effectiveness in functional identification of wheat powdery mildew resistance genes has been verified.Four parameters,including treatment method of wheat leaf,plasmids DNA amount per shot,plasmids coating method and the distance between stopping screen a...