Clon ing of DnaJ-like Gene cDNA in Diploid Pota to Using RACE MethodsCombined with cDNA Library Construction and utilization of a yeast two-hybrid cDNA library from Arabidopsis thaliana infected by powdery mildew Clon ing of DnaJ-like Gene cDNA in Diploid Pota to Using RACE MethodsCombined with cDNA Library