The complete chloroplast genome sequence of an alpine wildflower, Philadelphus calvescens (Rehd.) S. M. Hwang (Saxifragaceae).

Philadelphus calvescens, belonging to the family Saxifragaceae, is a beautiful shrub with white fragrant flowers which is widely distributed in southwest China. In this study, we sequenced the complete chloroplast (cp) genome of P. calvescens to investigate its phylogenetic relationship in Saxifragaceae. Total length of the cpDNA genome was 157,237 bp, consisting of a large single copy (LSC) region of 86,481 bp, a small single copy (SSC) region of 18,728 bp, and a pair of inverted repeat regions (IRs, 26,014 bp). The genome contained 114 genes, namely 79 protein-coding genes, 31 tRNA genes, and 4 rRNA. The overall GC content was 37.8%. Phylogenetic analysis suggested that Philadelphus was closely related to Deutzia. The present study was the first report on complete cp genome of Philadelphus so it could afford important genetic information for further researches on the genus and related genera. [ABSTRACT FROM AUTHOR]