Figure 3. Locally collinear blocks (LCBs) analysis for 17 complete chloroplast genomes.
The figure depicts linearized alignments identifying 33 conserved gene regions for 14 specimens of Pyropia (a–n), two of Porphyra (o–p), and outgrouped with Cyanidium caldarium (q). Each chromosome is oriented horizontally, and homologous blocks are shown as identically colored regions linked across genomes. Regions that are inverted relative to Py. perforata are shifted below the genome's center axis. Sequence similarities within an LCB are proportional to the heights of interior colored bars. Large sections of white within blocks, and gaps between blocks, indicate lineage specific sequences. The analysis shows that chloroplast genomes of Pyropia and Porphyra are similar in content and gene synteny. The single observable difference is the presence of ribosomal 16S, 23S and 5S repeats found in other Pyropia and the two species of Porphyra, but absent in Py. perforata. (a–l), Py. perforata, (a), LD-Ag 13037 (b), VK-11-00061 (c), UC 807662 (d), LD-Ag 13038 (e), UC 95739 (f), LD-Ag 13031 (g), UC 95735 (h), LD-Ag 13032 (i), UC 1450590 (j), UC 2019900 (k), UC 2019901 (l), UC 2019902 (m), Py. haitanensis (n), Py. yezoensis (o), Po. purpurea (p), Po. umbilicalis (q), Cyanidium caldarium. The figure was drawn using Mauve 2.3.139.
