genes on the 10 chromosomes and three subgenomes of Chinese cabbage. The different colored blocks represent different subgenomes. R2R3-BrMYB genes are shown on the left of each chromosome. The positive (+) and negative (−) symbols following each gene represent forward and reverse orientations, respectively, on the chromosome or subgenome. Gene positions and the size of each chromosome can be estimated using the scale on the left of the figure.