Complete Chloroplast Genomes of 9 Species: Genome Structure, Comparative Analysis, and Phylogenetic Relationships.

is a genus of functional herbaceous plants in the Balsaminaceae, which are not only of great ornamental value and one of the world's top three flower bedding plants but also have a wide range of medicinal and edible uses. Currently, the taxonomy and phylogenetic relationships of species are still controversial. In order to better understand their chloroplast properties and phylogenetic evolution, nine plants (, , , , , , , , ) were sequenced, and their complete chloroplast genomes were analysed. Nine species of chloroplast genomes ranged in length from 150,810 bp () to 152,345 bp (). The chloroplast genomes were all typical circular DNA molecules, and the GC content in each region was consistent with the published chloroplast genomes of plants. The results showed that the seven mutational hotspots (, , , , , , and ) could be used as supporting data for further analyses of the phylogenetic tree and species identification. In addition, the results of the phylogenetic tree support that Balsaminaceae is a monophyletic taxon, and that is at the base of the branch, is the original species of Balsaminaceae, and is in a sister group relationship with species. The results of this paper enrich the data of chloroplast genomes, and the availability of these chloroplast genomes will provide rich genetic information for species identification, thus enhancing the taxonomic accuracy and phylogenetic resolution of , and further promoting the investigation and rational use of plant resources.