Identification and mapping of host resistance genes to Septoria tritici blotch of wheat

Septoria tritici blotch (STB) of wheat is caused by the fungal pathogen Mycosphaerella graminicola (Fuckel) J. Schrot. in Cohn (anamorph: Septoria tritici Roberge in Desmaz.). STB is a devastating foliar disease that occurs in all wheat producing countries worldwide. The losses in yield and quality caused by severe STB epidemics have left researchers looking to further understand the inheritance of STB resistance and pathogen variability to develop agronomically sound, STB resistant cultivars. The objective of this study was to identify molecular markers linked to the STB resistance genes in the wheat line Salamouni. Doubled haploid (DH) lines were generated from a cross between Salamouni and the susceptible cultivar Katepwa. DH lines were evaluated for their reaction to isolates MG96-36 and MG2. Lines exhibiting resistance to both isolates and those only resistant to isolate MG2 were crossed back to Katepwa to develop F1 and F2 generations. (Abstract shortened by UMI.)...