Effectiveness of <i>Rlm7</i> resistance against <i>Leptosphaeria maculans</i> (phoma stem canker) in UK winter oilseed rape cultivars.

ABSTRACT: The Rlm7 gene in Brassica napus is an important source of resistance for control of phoma stem canker on oilseed rape caused by the fungus Leptosphaeria maculans. This study shows the first report of L. maculans isolates virulent against Rlm7 in the UK. Leptosphaeria maculans isolates virulent against Rlm7 represented 3% of the pathogen population when cultivars with the Rlm7 gene represented 5% of the UK oilseed rape area in 2012/13. However, the Rlm7 gene has been widely used since then, representing >15% of the UK oilseed rape area in 2015/16. Winter oilseed rape field experiments included cultivars with the Rlm7 gene, with the Rlm4 gene or without Rlm genes and took place at five sites in the UK over fo

SUBMITTER: Mitrousia GK 

PROVIDER: S-EPMC6108410 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature