DURABLE RESISTANCE AGAINST WHEAT LEAF SPOT GROUP PATHOGENS
Beatrice Corsi: National Institute Agriculture Botany
<div>The wheat leaf spot group (LSG) of necrotrophic pathogens (<em>Parastagonospora nodorum </em>- <em>Pn</em>, <em>Zymoseptoria tritici</em> – <em>Zt</em> and <em>Pyrenophora tritici-repentis</em> - <em>Ptr</em>, tan spot) are considered the most important fungal leaf spot diseases of wheat in Europe. As part of the ERA-CAPs funded project ‘EfectaWheat’ we are using an 8-parent wheat Multi-parent Advanced Generation Inter-Cross (MAGIC) genetic mapping population, genotyped with an Illumina 90k single nucleotide polymorphism (SNP) array, to investigate the genetics of LSG resistance in wheat. Representative UK <em>Pn</em> and <em>Ptr</em> isolates were used to inoculate MAGIC field trials 2017; disease severity and additional phenotypic data were scored. The combined datasets are used in genetic analyses to identify QTLs and possible relationships between wheat genetic loci controlling effectors- and pathogen-mediated host resistance/susceptibility. This information will provide useful tools for the development of improved wheat varieties with increased genetic resistance to LSG pathogens, helping to support sustainable wheat production in Europe.</div>
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