Susceptibility to Chlorosis and Its Relationship to Leaf Iron Contents in some Genotypes of Quince (Cydonia oblonga Mill.)

Fusarium head blight (FHB), caused by Fusarium graminearum, is a destructive disease of wheat in northern parts of Iran. In addition to yield loss, FHB may be a threat for human and animal health due to mycotoxin production by the pathogen causing the disease. The present study was conducted to examine SSR markers associated with resistance to FHB in selecting for resistance among twenty promising lines of wheat. The reactions of these genotypes to FHB were also determined under field and greenhouse conditions to confirm the effectiveness of the markers tested. In the present study, four out of 43 SSR markers including Xbarc117, Xgwm304, Xgwm261 and Xgwm282 were associated to FHB resistance genes/QTLs, in some of the promising lines. Phenotypic data also supported the effectiveness of these SSR markers for marker-assisted selection. The results of this study can be used for selection of resistant genotypes and providing cultivars/lines identification information in releasing new wheat cultivars.