Figure 1.

Gene map of the nine Allium chloroplast genomes. The genes inside and outside the circle are transcribed in the clockwise and counter-clockwise directions, respectively. Genes belonging to different functional groups are colour coded. The thick lines indicate the extent of the inverted repeats (IRa and IRb) that separate the genomes into large single-copy (LSC) and small single-copy (SSC) regions. Grey bars on the inside of circle indicate GC content, with the line representing 50%.