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. 2021 Jun 14;12:691833. doi: 10.3389/fpls.2021.691833

FIGURE 6.

FIGURE 6

The non-synonymous-to-synonymous substitution (Ka/Ks) ratios of 73 coding genes of (A) Acanthochlamys bracteata plastome relative to Xerophyta viscosa and (B) Acanthochlamys bracteata plastome relative to Xerophyta spekei. Note: Y- axis represents the Ka/Ks values (ratios) while the X- axis represents the protein-coding genes within the chloroplast genomes.