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Figure 1 | BMC Evolutionary Biology

Figure 1

From: Dynamics and evolution of the inverted repeat-large single copy junctions in the chloroplast genomes of monocots

Figure 1

Classification of IR-LSC junction types based on the organization of genes flanking JLB and JLA in angiosperms. Triangles coded by different colors and letters indicate various locations of IR-LSC junctions in corresponding angiosperm lineages. Shaded boxes denote protein-coding genes, and boxes with broken margins and gradient color stand for genes that are variable in length. Relationships of major non-monocot (A) and monocot (B) lineages followed the phylogenetic trees of Soltis et al. (2005) [27]. (A) In type I the IR-LSC junction is located downstream of rpl2 and upstream of rps19 . In type II rps19 is located downstream of rpl2 in IRA. (B) In type III each IR has a copy of the trnH-rps19 cluster, although in the IRA regions the rps19 genes are variously truncated at the 3' regions in sampled taxa. The blue gradient on the right side of the monocot phylogenetic tree denotes the progressively expanded IRs.

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