Genotyping data for the BnDYDH population included an analysis of SNPs from the Brassica 60K Illumina Infinium SNP array (Clarke et␣al., 2016 (link)), the 20K Illumina Infinium SNP array (Chalhoub et␣al., 2014 (link)) and the 8K Illumina Infinium SNP array (Delourme et␣al., 2013 (link)). The genetic map contained 28 000 loci that represented 3592 unique loci, and covered 2128.2 cM (Laperche et␣al., 2017 (link)). The phenotypic data were mapped as quantitative traits with the R/qtl package (Broman et␣al., 2003 (link)) or as a qualitative traits where scores of 1 to 3 were considered to indicate plant resistance and scores of 4 to 6 were considered to indicate susceptibility.