Complete Chloroplast Genome of (Papilionoideae: Fabaceae): Comparative and Phylogenetic Analysis.

is an endemic forage grasses in China with high ecological value. In this study, the complete chloroplast genome of was sequenced using Illumina paired-end sequencing. The chloroplast genome was 123,100 bp and comprised 105 genes, including 74 protein-coding genes, 4 rRNA-coding genes, and 27 tRNA-coding genes. The genome had a GC content of 34.53%, with 50 repetitive sequences and 63 simple repeat repetitive sequences that did not contain reverse repeats. The simple repeats included 45 single-nucleotide repeats, which accounted for the highest proportion and primarily comprised A/T repeats. A comparative analysis of , and four species revealed that the six genomes were highly conserved, with differentials primarily located in the conserved non-coding regions. Moreover, the and genes in the coding regions exhibited high nucleotide variability. Accordingly, these genes may serve as molecular markers for the classification and phylogenetic analysis of species. Phylogenetic analysis further revealed that and appeared in different clades than the four species. The newly sequenced chloroplast genome provides further insights into the phylogenetic position of , which is useful for the classification and identification of