Fig. 1

Gene map of the Alpinia galanga plastome. The first circle shows the species name and specific information regarding the genome (length, GC content, and the number of genes) from the center going outward. The optional GC content is depicted as the proportion of the shaded parts of each section and the length of the corresponding single short copy (SSC), inverted repeat (IRa and IRb), and large single-copy (LSC) regions are also given in this circle. The outer circle shows the gene names and their optional codon usage bias. The genes are colored based on their functional categories. Genes inside and outside of the circle are transcribed in clockwise and counterclockwise directions, represented with arrows. The optional shaded area stretching from the inner sphere toward the outer circle marks the IR regions