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

Recruiting resistance to Septoria tritici blotch disease from a wild relative of wheat

Amber Hafeez*
John Innes Centre

Kumar Gaurav
John Innes Centre

Sanu Arora
John Innes Centre

Laetitia Chartrain
John Innes Centre

Burkhard Steuernagel
John Innes Centre

Open Wild Wheat Consortium OWWC
Open Wild Wheat Consortium

Cyrille Saintenac
INRA/UBP UMR 1095 GDEC (Genetics, Diversity and Ecophysiology of Cereals), Clermont-Ferrand, France

James Brown
John Innes Centre, Norwich Research Park, United Kingdom

Brande Wulff
John Innes Centre, Norwich Research Park, United Kingdom

Poster Presentation
Host Genetics and Resistance Breeding

Atrium, UCD O'Brien centre for Science
Poster 46

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Septoria tritici blotch (STB) of wheat is a devastating foliar disease caused by the fungal pathogen Zymoseptoria tritici, accounting for significant yield losses in temperate regions worldwide. This pathogen has overcome all unisite fungicides and evolved multidrug resistance; therefore, it is vital that new resistance genes are discovered, characterised and deployed. Many crop wild relatives contain unexploited genetic variation which has not been subjected to the genetic bottlenecks and strong selection pressures imposed upon modern monoculture-grown crop varieties. The D-genome progenitor of bread wheat, Aegilops tauschii, represents a rich source of disease resistance that can be readily incorporated into wheat. Many Ae. tauschii accessions are highly resistant or immune to STB; however, understanding the genetic basis of this resistance is hindered by a poor agronomy which complicates the creation of laboratory-based genetic population structures. To overcome this challenge, we are using the historical recombination accumulated in a genetically diverse, sequence-configured population of Ae. tauschii ( We will present our work so far on using genome-wide association genetics to characterise the functional genetic architecture of Ae. tauschii resistance to Z. tritici.