The complete chloroplast genome and phylogenetic analysis of <i>Oxytropis kansuensis</i> Bunge (Fabaceae)

<i>Oxytropis kansuensis</i> Bunge holds significant medicinal and ecological values. Nevertheless, the absence of a complete chloroplast genome has impeded our ability to better understand and utilize this plant. In this study, the complete chloroplast genome of <i>O. kansuensis</i> was sequenced and <i>de novo</i> assembled for the first time. The total genome length was determined to be 127,115 bp, with a guanine–cytosine (GC) content of 34.29%. It was observed that the inverted repeat (IR) region was absent in this species. A total of 110 genes were annotated, including 76 PCGs, 30 tRNA genes, and four rRNA genes. A phylogenetic tree was constructed from the complete chloroplast genome sequences of 10 <i>Oxytropis</i> species and seven <i>Astragalus</i> species. The result indicated that <i>Oxytropis</i> and <i>Astragalus</i> clearly form distinct monophyletic lineages, respectively, and <i>O. kansuensis</i> is most closely related to the <i>O. ochrocephala</i>. This research not only enriches the genomic database but also establishes a firm foundation for future studies on <i>O. kansuensis</i>. Furthermore, it offers compelling scientific evidence to advance broader phylogenetic and evolutionary investigations of <i>Oxytropis</i>.