Project description:Pimpinella rhomboidea var. tenuiloba is an endemic species in China. The complete chloroplast genome sequence of P. rhomboidea var. tenuiloba was generated by de novo assembly using whole genome next generation sequencing. The genome was 146,655 bp in length, composed of four distinct regions such as large single copy (LSC) region of 94,684 bp, small single copy (SSC) region 17,537 bp and a pair of inverted repeat regions of 17,217 bp. The genome annotation predicted a total of 113 genes, including 80 protein-coding genes, 29 tRNA genes, and 4 rRNA genes. Phylogenetic analysis with the reported chloroplast genomes revealed that P. rhomboidea var. tenuiloba has close relationship with genus Angelica.
Project description:Pimpinella L. is one of the large genera in the Apiaceae family. In a previous study, the molecular phylogenies of Pimpinella were explored using nuclear ribosomal DNA internal transcribed spacers (ITS) and several chloroplast DNA segments. There have been few studies conducted on chloroplast genomes in Pimpinella, which has limited systematic understanding of this genus. We assembled the complete chloroplast genomes of nine Pimpinella species from China using data generated from next generation sequencing (NGS). The chloroplast (cp) DNA used were standard double-stranded molecules, ranging from 146,432 base pairs (bp) (P. valleculosa) to 165,666 bp (P. purpurea) in length. The circular DNA contained a large single-copy (LSC) region, small single-copy (SSC) region, and pair of inverted repeats (IRs). The cp DNA of the nine species contained 82-93 protein-coding genes, 36-37 transfer RNA (tRNA) genes, and eight ribosomal RNA (rRNA) genes, respectively. Four species (P. smithii, P. valleculosa, P. rhomboidea, and P. purpurea) exhibited striking distinctions in genome size, gene number, IR boundary, and sequence identity. We confirmed the non-monophyly of the Pimpinella species on the basis of the nine newly identified plastomes. The distant relationship between the above-mentioned four Pimpinella species and Pimpinelleae was indicated with high support values. Our study provides a foundation for future in-depth phylogenetic and taxonomic studies of genus Pimpinella.
