Sustainable strategies for managing Brassica napus (oilseed rape) resistance to Leptosphaeria maculans (phoma stem canker)

World-wide importance of phoma stem canker (Leptosphaeria maculans and L. biglobosa) on oilseed rape (Brassica napus).- Genetic linkage maps and genomic organization in Leptosphaeria maculans.- Major gene resistance in Brassica napus (oilseed rape) is overcome by changes in virulence of populations of Leptosphaeria maculans in France and Australia.- Major gene and polygenic resistance to Leptosphaeria maculans in oilseed rape (Brassica napus).- A large-scale survey of races of Leptosphaeria maculans occurring on oilseed rape in France.- Frequency of avirulence alleles in field populations of Leptosphaeria maculans in Europe.- Fitness cost associated with loss of the AvrLm4 avirulence function in Leptosphaeria maculans (phoma stem canker of oilseed rape).- Improved resistance management for durable disease control: A case study of phoma stem canker of oilseed rape (Brassica napus).- Durability of resistance and cost of virulence.- Dissemination of information about management strategies and changes in farming practices for the exploitation of resistance to Leptosphaeria maculans (phoma stem canker) in oilseed rape cultivars.