Complete plastid genome of the Chinese medicinal herb Paeonia obovata subsp. Willmottiae (Paeoniaceae): characterization and phylogeny

The plastid genome (plastome) of the endemic Chinese medicinal herb Paeonia obovata subsp. Willmottiae (Paeoniaceae) was sequenced and investigated in this study. The complete plastome is 152,713 bp in length with the typical quadripartite structure, which consists of a large single-copy region (LSC, 84,419 bp), a small single-copy region (SSC, 16,982 bp), and a pair of inverted repeat regions (IRs, 25,656 bp). The overall GC content is 33.2%, and the IR regions are more GC rich (43.2%) than the LSC (36.7%) and SSC (32.8%) regions. A total of 114 unique genes, including 79 protein-coding genes, 31 tRNAs, and four rRNAs were identified. Phylogenetic reconstruction based on complete plastome sequences demonstrated that P. obovata subsp. Willmottiae is phylogenetically closest to P. obovata.