The chloroplast genome evolution of Venus slipper (Paphiopedilum): IR expansion, SSC contraction, and highly rearranged SSC regions.

ABSTRACT:

Background

Paphiopedilum is the largest genus of slipper orchids. Previous studies showed that the phylogenetic relationships of this genus are not well resolved, and sparse taxon sampling documented inverted repeat (IR) expansion and small single copy (SSC) contraction of the chloroplast genomes of Paphiopedilum.

Results

Here, we sequenced, assembled, and annotated 77 plastomes of Paphiopedilum species (size range of 152,130 - 164,092 bp). The phylogeny based on the plastome resolved the relationships of the genus except for the phylogenetic position of two unstable species. We used phylogenetic and comparative genomic approaches to elucidate the plastome evolution of Paphiopedilum. The plastomes of Paphiopedilum have a conserved genome structure and gene content except in

SUBMITTER: Guo YY 

PROVIDER: S-EPMC8165784 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature