Using Non-host Species To Identify Novel Genes For Durable Clubroot Resistance in Canola

Researcher: Peta Bonham-Smith, Tagnon Missihoun, Chris Todd, Yangdou Wei, University of Saskatchewan; Gary Peng, Bruce Gossen Agriculture and Agri-Food Canada, Saskatoon SK; and Simeon Kotchoni, Rutgers University, Camden NJ

Project Code: CGDP ADF/SCDC 2013-96

Final Report: December 2017

Summary: Clubroot, a serious threat to canola (Brassica napus) yields across Canada, is caused by the intracellular parasite Plasmodiophora brassicae. Researchers conducted a four-year study based on previous studies to identify the differences in host and non-host (Brachypodium distachyon) physical and genetic responses to infection by P. brassicae, and to identify durable resistance that may be transferred from non-host plants to canola. Overall, the results of the project established B. distachyon as a non-host species for clubroot disease, however, in general B. distachyon does not respond at the genomic level to an infection by P. brassicae. Therefore, researchers recommend that understanding the compatible host-pathogen system is a higher priority for the identification of plant resistance than understanding non-host systems.

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