The complete chloroplast genome sequence of the Purple Feathergrass Stipa purpurea (Poales: Poaceae)

Abstract

The complete chloroplast genome of the Purple Feathergrass Stipa purpurea (Poales: Poaceae: Stipeae) has been assembled from the whole-genome Illumina sequencing data. The circular genome is 137,370 bp in size, and comprises a pair of inverted repeat regions of 21,663 bp each, a large single-copy region of 81,202 bp and a small single-copy region of 12,842 bp. It harbors 130 genes, including 84 protein-coding genes (78 PCG species), eight ribosomal RNA genes (four rRNA species) and 38 transfer RNA genes (30 tRNA species). The base composition is asymmetric (30.7 % A, 19.3 % C, 19.5 % G, 30.5 % T) with an overall A+T content of 61.2 %. Phylogenetic analysis indicated that S. purpurea is more phylogenetically related to its contribal counterparts than to those from other tribes, except for the case of Ampelodesmos mauritanicus (tribe Ampelodesmeae) probably due to its identity as an ancient hybrid between parents from Stipeae and Phaenospermateae.