The complete chloroplast genome of Dendrobium pseudotenellum (Orchidaceae)

Abstract

Dendrobium pseudotenellum is an endangered species in Orchidaceae, which is distributed in Yunnan of China and Vietnam. Here, we report the complete chloroplast (cp) genome sequence and its genome features of D. pseudotenellum. The cp genome sequence of D. pseudotenellum was 149,114 bp in length with 37.4% GC content. It presented a typical quadripartite structure including a large single-copy region (LSC, 84,262 bp), a small single-copy region (SSC,12,786 bp), and two inverted repeat regions (IRA and IRB, 26,033 bp, each). The cp genome encoded 125 genes, including 80 protein-coding genes, 37 tRNAs, and 8 rRNAs. The phylogenetic analysis was conducted based on 72 protein-encoding genes from D. pseudotenellum and other 19 Dendrobium species, with 4 species of Cymbidium and Pleione as outgroup. It turned out that D. pseudotenellum was a sister to D. exile. This chloroplast genome would be helpful for the phylogeny and conservation of Dendrobium.

Keywords

• chloroplast genome
• dendrobium pseudotenellum
• orchidaceae
• phylogenetic analysis