The complete chloroplast genome sequence of Populus rotundifolia, and a comparative analysis with other Populus species

摘要

Populus rotundifolia, which is an endemic of the Himilayas and adjacent regions, is the species thatoccupy the highest habitat in the Populus genus. The complete chloroplast genome sequence ofPopulus rotundifolia was characterized from Illumina pair-end sequencing. The chloroplast genome of P.rotundifolia was 155,212bp in length, containing a large single-copy region (LSC) of 84,545bp, a smallsingle-copy region (SSC) of 16,859bp, and two inverted repeat (IR) regions of 26,904bp. The overall GCcontent is 36.80%, while the correponding values of the LSC, SSC, and IR regions are 34.5%, 30.5%,and 42.3%, respectively. The genome contains 131 complete genes, including 86 protein-coding genes(62 protein-coding gene species), 37 tRNA genes (29 tRNA species) and 8 rRNA genes (4 rRNA species).The Neighbour-joining phylogenetic analysis showed that P. rotundifolia and Populus davidiana clus-tered together as sisters to other Populus species.