Evaluation of resistance to powdery mildew and identification of resistance genes in wheat cultivars

Wheat powdery mildew, caused by the biotrophic fungus Blumeria graminis f. sp. tritici ( Bgt ), is a serious disease of wheat worldwide that can cause significant yield losses. Growing resistant cultivars most cost-effective and eco-soundly strategy to manage disease. Therefore, high breeding priority identify genes be readily used either singly or in combination for effective resistance mildew also with other diseases. Yunnan Province, complex diverse ecological environments climates, one main growing regions China. This region provides initial inoculum starting epidemics thus, plays key role regional large-scale throughout The objectives this study were evaluate seedling 69 determine presence Pm3 , Pm8 Pm13 Pm16 Pm21 these using gene specific DNA markers. Evaluation six isolates showed only four all tested isolates, indicating overall level inadequate. molecular marker results 27 likely have at least genes. Six found 18 5 3 . No cultivar was carry information on Pm future programs. In particular, carrying which against races China, should pyramided developing new durable mildew.