Characterization of the chloroplast genome of theOsmanthus didymopetalus

In this study, we assembled the chloroplast genome ofOsmanthus didymopetalus(Oleaceae), a rare evergreen tree native to Hainan, China. The genome ofO. didymopetaluswas 155,155 bp in length and contained a pair of inverted repeats (IR, 25,697-25,704 bp) regions, which were separated by the small single copy (SSC, 17,591 bp) and the large single copy (LSC, 86,225 bp) regions. The cp genome encoded 133 genes including 88 protein-coding genes, 37 tRNA genes, and eight rRNA ribosomal genes. The overall GC content ofO. didymopetaluschloroplast genome is 37.8%. Phylogenetic results showed thatO. didymopetaluswas more closely toO. yunnanensis,O. fragransandO. insularis. This study will be beneficial for the evolutionary study and phylogenetic reconstruction ofOsmanthus.