Intraspecific Hybridization among Aegilops tauschii Varieties & Genetic Analysis and Molecular Markers of a Novel Stripe Rust Resistance Gene from A. tauschii

As the wild relatives of wheat and D genome donor of wheat, Aegilops tauschii with many resistant resources, and is an important genetic resource for wheat breeding. Genetic analysis and disease resistance identification were made for the wheat stripe rust of filial generation from immune material Y206 and high sensitive Y121. A dominant wheat stripe rust resistance gene was detected from A. tauschii (Coss.) Schmal Y206. The novel gene was temporarily designated as YrY206. Using the microsatellite marker location on the chromosome, by bulk segregation analysis, four microsatellite markers Wmc11a, Xgwm71c, Xgwm161 and Xgwm183 were found and linked to YrY206 with genetic distances of 4.0, 3.3, 1.5 and 9.3 cM, respectively. According to the locations of the linked markers, the resistance gene was located on chromosome 3DS and YrY206 may be a novel stripe rust resistance gene.