The complete chloroplast genome of Euonymus szechuanensis

Abstract

The complete chloroplast genome from Euonymus szechuanensis, a rare deciduous shrub of the Celastraceae endemic to China, which is classified as vulnerable on the list of Threatened species in China because species diversity decreased sharply, is determined in this study. The whole chloroplast genome sequence of Euonymus szechuanensis has been characterized by Illumina pair-end sequencing. The circular genome is 157,465 bp long, containing a large single-copy region (LSC) of 86,401 bp and a small single-copy region (SSC) of 18,472 bp, which are separated by a pair of 26,296 bp inverted repeat regions (IRs). It encodes a total of 136 genes, including 84 protein-coding genes (76 PCG species), 44 tRNA genes (30 tRNA species), and 8 ribosomal RNA genes (4 rRNA species). Most of the gene species occur as a single copy, while 19 gene species occur in double copies. The overall A + T content of the circular genome is 62.8%, while the corresponding values of the LSC, SSC and IR regions are 65.0, 68.4 and 57.3%, respectively. Phylogenetic analysis suggested that E. szechuanensis was relatively close to Euonymus schensianus among the species analyzed. This complete chloroplast genome will provide valuable insight into conservation and restoration efforts for this rare and Threatened species.

Keywords

• chloroplast genome
• euonymus szechuanensis
• genome assembly
• phylogeny