Characterization of the complete chloroplast genome of a subalpine deciduous shrub Lonicera angustifolia var. myrtillus (Caprifoliaceae)

Lonicera (Caprifoliaceae) has extensive taxonomic evaluation and phylogenetic inference, while its phylogenetic relationships among sections, subsections and species are still obscure. Here, we reported the first species complete chloroplast genome sequence in the section Isoxylosteum, Lonicera angustifolia var. myrtillus, from the woody lineage Lonicera (Caprifoliaceae). It is 156,222 bp in length, comprising a Large Single-Copy (LSC) region of 89,838 bp, a Small Single-Copy (SSC) region of 19,211 bp, and a pair of Inverted Repeats (IRs) of 23,509 bp. In L. angustifolia var. myrtillus chloroplast genome, a total of 114 functional genes were identified, with an overall GC content of 38.4%. Phylogenetic relationships of Lonicera based on maximum likelihood (ML) showed that L. angustifolia var. myrtillus is most closely related to L. nervosa in section Isika. Our study will contribute to the molecular phylogenetic studies of Lonicera and related taxa.