Plant Materials and Pathogen Isolates

The association population of rapeseed including 472 accessions, which were collected from 23 countries worldwide of four continents, has been previously reported (Li et al., 2014). All the seeds of these inbred lines were conserved in the National Mid-term Gene Bank for Oil Crops in Wuhan, China. To carry out the artificial inoculation in greenhouse (GH), the infected roots of rapeseed were collected from the infected field (IF) of Dangyang, China, where the pathogen was reported as pathotype 4 based on Williams classification (Ren et al., 2012).