Comparative mapping of homologous linkage groups between
B. rapa/B. oleracea
. (a, e) QTLs associated with 10 traits in multiple experiments, and the ring point in the bar indicates the QTL peak position. (b, f) The building blocks of Brassica genomes are identified on TN genetic maps. (c, g) On the left side are the markers on TN chromosome, and on the right side are candidate genes of Arabidopsis underlying the QTL confidence interval. (d, h) Genes with colored font are the candidate genes in B. rapa/B. oleracea of Arabidopsis, and genes with black font are the candidate genes in B. rapa/B. oleracea identified by each informative marker. The homologous genes in A/C genomes of B. rapa/B. oleracea and B. napus are connected with colored lines using the homologous genes as anchors. The genetic length of TN chromosome is annotated at the bottom of chromosome. The color-coding of the blocks is based on the report of Schranz et al. (2006)  and the candidate genes with the same color as the block.