Fig. 4

Pairwise Ka/Ks ratios in Bupleurum. This heatmap shows pairwise Ka/Ks ratios between every sequence in the multigene nucleotide alignment. The original satellite imagery was obtained from Google Maps (Map data: Google, TerraMetrics; https://maps.google.com/), and modified with Adobe Illustrator CS6 (Adobe Systems Incorporated, San Jose, CA, USA)