Developing near-isogenic Brassica napus lines for differentiating pathotypes of Plasmodiophora brassicae

Researcher: Fengqun Yu, Gary Peng, Bruce Gossen, Sally Vail, Agriculture and Agri-Food Canada, Saskatoon SK, Stephen Strelkov, University of Alberta, and Sheau-Fang Hwang, Alberta Agriculture and Rural Development

Project Code: CGDP SCDC/ADF 2013-122 Yu

Final Report: February 2018

Summary: Researchers initiated a four-year project in 2014 to develop a set of differential lines of spring type Brassica napus with single genes for identification of races of Plasmodiophora brassicae and for durable resistance to clubroot. Overall the project has resulted in two B. napus lines carrying Rcr1 and Rcr2 respectively and breeding lines carrying each of several other identified resistance genes, some of which have been distributed to canola seed companies. Canola breeders in the companies are incorporating the genes into their commercial cultivars for control of clubroot. Under a new project, more homozygous B. napus clubroot resistant lines from these materials are expected to be developed and clubroot pathogen races in western Canada to be determined.

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