Mapping Scab Resistance In the Winter Wheat Line MD01W233-06-1.

Fusarium head blight (FHB), caused by Fusarium graminearum, is a devastating disease of wheat (Triticum aestivum L.) in the United States and around the world that affects grain yield and quality by producing deoxynivalenol (DON) toxin. The objective of this research is to map resistance to scab in a doubled haploid population derived from the resistant soft winter wheat genotype MD01W233-06-1 and the susceptible genotype SS8641 under field conditions in Maryland. Twenty nine Simple Sequence Repeat (SSR) markers, and one morphological marker (red coleoptile) were used for linkage analysis and mapping of scab resistance traits. Seven linkage groups with 2 to 3 markers and one group of unlinked 15 markers were found. A total of 26 Quantitative Trait Loci (QTL) were detected by Map manager analysis. The QTL with the highest effect for Fusarium Damaged Kernels (FDK) and DON was located on 1A near SSR marker wmc496Nd (for FDK and DON) which is also near the 1AL.1RS translocation.