Pathogenic and molecular variation of Fusarium species causing head blight on barley landraces

Abstract Fusarium head blight (FHB) is consistently one of the most important barley diseases worldwide. This study aimed to evaluate pathogenicity 16 isolates four species under controlled conditions and their genetic variability using 22 random amplified polymorphic DNA (RAPD) markers. Pathogenic variation was characterized based on disease development rates index two Syrian landraces with varying resistance FHB, Arabi Aswad (AS) Abiad (AB). Significant differences in intra - inter susceptibility between above-mentioned cultivars were highlighted. Overall, showed moderately susceptible levels fungal infection FHB spread within head. Quantitative traits significant correlation previous data generated vitro field conditions, suggesting that growth chamber indices can predict quantitative various experimental conditions. Based PCR amplification seven different primers, variation. Dendrogram by cluster analysis RAPD markers main groups, a possible clonal origin could exist species. fingerprints are not useful distinguish pathogenicity.