The complete chloroplast genome of a Chinese endemic ornamental plant Sorbus unguiculata Koehne (Rosaceae)

Abstract

Sorbus unguiculata is a pinnate-leaved deciduous shrub growing in mixed forests in Sichuan province, China. It is one of the least known species in the genus with high ornamental value. In this study, we firstly assembled and annotated the complete chloroplast genome of the species using the next-generation sequencing method. The results showed that the chloroplast genome size is 159,900 bp, comprising of a large single-copy (LSC) region of 87,888 bp, a small single-copy (SSC) region of 19,256 bp, and a pair of IR regions of 26,378 bp. The whole cp genome predicted 109 genes in total, including 76 protein-coding genes, 29 tRNAs, and 4 tRNAs. The overall GC content of the chloroplast genome is 36.6%. The phylogenetic relationship exhibited that S. unguiculata is closely clustered with S. helenae in Sorbus.

Keywords

• sorbus unguiculata
• ornamental
• chloroplast genome
• phylogenetic relationship