International Symposium on Cereal Leaf Blights 2019 | University College Dublin, Ireland | 22-24 May 2019

Fine mapping of Stb19, a new resistance gene to Zymoseptoria tritici in wheat


Nannan Yang*
NSW Department of Primary Industries, Wagga Wagga Agricultural Institute, Pine Gully Road, Wagga Wagga, NSW 2650, Australia

Megan McDonald
Division of Plant Sciences, Research School of Biology, The Australian National University, Canberra 2601, Australia

Peter Solomon
Division of Plant Sciences, Research School of Biology, The Australian National University, Canberra 2601, Australia

Andrew Milgate
NSW Department of Primary Industries, Wagga Wagga Agricultural Institute, Pine Gully Road, Wagga Wagga, NSW 2650, Australia


Poster Presentation
Host Genetics and Resistance Breeding

Atrium, UCD O'Brien centre for Science
Poster 45

View this abstract online by visting isclb2019.com/see/ABS58686

A new R gene, Stb19, was mapped on the short arm of chromosome 1D, exhibiting complete resistance to three Zymoseptoria tritici isolates, WAI332, WAI251, and WAI161 at the wheat seedling stage. Two closely linked Kompetitive Allele Specific PCR markers with Stb19, snp_4909967 and snp_1218021, were then tested and validated in an additional segragating population and a collection of 266 wheat accessions, giving 95% accuracy of resistance/susceptibility prediction. Stb19 was also integrated into four commecial wheat cultivars to increase the performance of resistance in the field. Towards cloning the gene, Stb19 was fine mapped in a mega base pair region based on IWGSC reference genome.