Show simple item record

dc.contributor.authorFletcher, J.M.
dc.contributor.authorCross, C.L.
dc.contributor.authorKutcher, H.R.
dc.description.abstractEach year blackleg disease of canola (Brassica napus L.), caused by Leptosphaeria maculans (Desmaz.) Ces. & De Not., is responsible for significant yield loss of Brassica napus L., oilseed rape and canola worldwide. In western Canada, blackleg disease has been managed using a combination of four-year rotations and resistant canola varieties. To determine the current race structures present in western Canada, isolates were collected from eight locations across Alberta, Saskatchewan, and Manitoba in 2007 and 2008. These isolates were inoculated onto eight different canola varieties containing different resistant genes: ‘Westar’, ‘Quinta’, ‘Glacier’, ‘MT29’, ‘Samourai’, ‘Quantum’, ‘Falcon’ and ‘Darmor’. Using the gene-for-gene theory, race structure was determined based on variety resistance to L. maculans. A scale of 0 (no disease symptoms) to 9 (severely diseased) (Newman 1980) was implemented to assess plant resistance, with a score of 5 and above suggesting susceptibility. Preliminary results have identified 18 different races, nine of which contain the majority of isolates. These results have also shown that the frequency of L. maculans avirulent alleles greatly varies between the different sites in western Canada.en_US
dc.relation.ispartofSoils and Crops Workshop
dc.rightsAttribution-NonCommercial-NoDerivs 2.5 Canada*
dc.titleDetermining the race structure of Leptosphaeria maculans in western Canadaen_US
dc.description.versionNon-Peer Reviewed

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 2.5 Canada
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada