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Calanthe sieboldii Decne. ex Regel is a terrestrial orchid with high ornamental and commercial value. In the present study, the chloroplast genome of C. sieboldii was characterized using Illumina technology. The chloroplast genome is 158,345 bp in length with a total AT content of 63.28%. There are 127 genes, comprising 37 tRNA genes, 82 protein-coding genes, and 8 rRNA genes. Phylogenetic relationship analysis was performed using common protein-coding genes extracted from 13 chloroplast genomes of Orchidaceae. It was revealed that C. sieboldi was sister to C. hancockii and closely clustered with C. aristulifera and C. henryi. These findings provide valuable genomic resources that are helpful for further phylogenetic and evolutionary studies of Calanthe.
Peng et al. (Sun,) studied this question.