Molecular mapping of a novel yellow rust resistance gene of wheat using microsatellite markers

Identification and genetic analysis of yellow rust resistance have suggested that wheat line R55 carries single dominant gene conferring yellow rust resistance. The bulked segregant analysis (BSA) for an F2 population using microsatellite marker technique has indicated that the yellow rust resistance gene is located on the short arm of chromosome 1B, tightly linked to the microsatellite markers WMS11-193 bp and WMS18-184 bp, the linkage distance between the markers and the gene is 1.9 cM. This gene has been formally namedYr26. It is inferred from the pedigree, resistance and gene locus analysis that theYr26 has been transferred fromTriticum turgidum L. and is different from the other known yellow rust resistance genes.