Complete chloroplast genome of eight Phaius (Orchidaceae) species from China: comparative analysis and phylogenetic relationship

It was the first report on the complete cp genome of six Phaius species (P. columnaris, P. mishmensis, P. takeoi, P. tonkinensis, P. wallichii and P. wenshanensis) and has been comparatively analyzed in detail with P. flavus and P. tancarvilleae. It provided a comprehensive investigation of various cp genomic features for phylogenetic implications, including overall genome structure, codon usage, repeat sequences, IR boundaries, DNA polymorphisms, and phylogenetic reconstruction. It was suggested that Phaius and Calanthe s. s. should be treated as two independent genera. The concept of new genus Paraphaius was not confirmed by complete cp genomic data here. The intergeneric relationship of Phaius and its alliance in Calanthe group could be understood better by more cp genomic data.