The complete chloroplast genome sequence of Cynanchum auriculatum Royle ex Wight (Apocynaceae)

Cynanchum auriculatum is a climbing vine belonging to the Apocynaceae family and shows very similar morphology to Cynanchum wilfordii, a medicinal plant. The complete chloroplast genome of C. auriculatum was generated by de novo assembly using the small amount of whole genome sequencing data. The chloroplast genome of C. auriculatum was 160 840 bp in length and consisted of four distinct regions, such as large single copy region (91 973 bp), small single copy region (19 667 bp), and a pair of inverted repeat regions (24 600 bp). The overall GC contents of the chloroplast genome were 37.8%. A total of 114 genes were predicted and included 80 protein-coding genes, 30 tRNA genes, and four rRNA genes. Phylogenetic analysis with the reported chloroplast genomes revealed that C. auriculatum is most closely related to Cynanchum wilfordii, a medicinal plant.