Corydalis is one of the few lineages that have been reported to have extensive large-scale chloroplast genome (cp-genome) rearrangements. In this study, novel cp-genome rearrangements of Corydalis pinnata, C. mucronate, and C. sheareri are described. C. pinnata is a narrow endemic species only distributed at Qingcheng Mountain in southwest China. Two independent relocations of the same four genes (trnM-CAU-rbcL) were found relocated from the typically posterior part of the large single-copy region to the front of it. A uniform inversion of an 11-14-kb segment (ndhB-trnR-ACG) was found in the inverted repeat region; and extensive losses of accD, clpP, and trnV-UAC genes were detected in all cp-genomes of all three species of Corydalis. In addition, a phylogenetic tree was reconstructed based on 31 single-copy orthologous proteins in 27 cp-genomes. This study provides insights into the evolution of cp-genomes throughout the genus Corydalis and also provides a reference for further studies on the taxonomy, identification, phylogeny, and genetic transformation of other lineages with extensive rearrangements in cp-genomes.
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| http://dx.doi.org/10.1038/s41598-022-17721-y | DOI Listing |
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