Fig. 1

The plot shows the basic characteristics of the nine chloroplast genomes acquired in this study. The outer circle shows gene placement and annotation across the genome. Genes are represented in different colors. Positive and negative gene orientations are shown as outer and inner circles. Inner circles represent nine newly sequenced Dendrobium chloroplast genomes. The high-identity areas are highlighted in light grey for chloroplast genome sequence variability (100%). Dendrobium species are displayed using distinct colors, which mark the length of four IR/SC junctions