The einkorn wheat contains abundant resistance genes and is one of important resources for common wheat cultivar improvement. An einkorn wheat accession 3AA30 was proved to be resistant to wheat powdery mildew in Beijing. Genetic analysis showed that 3AA30 carried a recessive resistance gene,temporally designated as ml3AA30. Five SSR markers( Xgwm6,Xcfd39,Xcfa2185,Xcfa2141,and Xcfa2155) and two STS markers( Xmag2170 and Xmag1491) on chromosome 5AL of wheat were found linked to ml3AA30 by bulked segregant an...