Figure 4

The number of Simple Sequence Repeats (SSRs) in Populus chloroplast genomes and two out-group species. a: A/T SSRs; b: other common SSR motifs.
The number of Simple Sequence Repeats (SSRs) in Populus chloroplast genomes and two out-group species. a: A/T SSRs; b: other common SSR motifs.