The complete chloroplast genome of Oxytropis monophylla (Fabaceae): insights into genome features and evolutionary relationships.

Oxytropis monophylla belongs to the genus Oxytropis of the family Fabaceae, and is an ecologically significant species, as it plays a vital role in desertification control. However, the chloroplast genome of O. monophylla remains unreported. Here, we constructed a high-quality chloroplast (cp) genome assembly for O. monophylla using NOVOPlasty and Illumina sequencing data. The results showed that the O. monophylla cp genome exhibited atypical structural characteristics due to the absence of an IR region. The chloroplast genome was 122,413 bp long with a GC content of 34.2%, encoding 108 complete genes. Phylogenetic reconstruction through both maximum likelihood and Bayesian inference methods resolved 12 Oxytropis species into two strongly supported clades (BS, PP =100%, 1). The O. monophylla and O. bicolor formed a monophyletic group, indicates a close relationship between the two species. The first chloroplast genome of O. monophylla establishes a good foundation for further genetic and genomic studies of the Oxytropis genus.