Fig. 2

Analyses of expansion and contraction of inverted repeats of the five Cistanche species. The genes present at the top of track transcribe counterclockwise, whereas genes present below the track transcribe clockwise. Schematic representation of the boundary areas of LSC (light blue), IRa (yellow), SSC (green), and IRb (yellow) region for Cistanche species. The species names are shown to the left. The junction sites between LSC and IRb (JLB), IRb and SSC (JSB), SSC and IRa (JSA), IRa and LSC (JLA) are marked with the perpendicular dashed lines. The genes rpl22 (dark blue), rps19 (light red), ycf1 (blue), ycf2 (dark blue), rps15 (light orange), rpl32 (light green), rpl2 (green) are shown above the plastomes. The numbers above the gene features denote the distance between the gene borders, either the start or end of genes and the junction sites