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The complete chloroplast genome sequences of six Hylotelephium species: Comparative genomic analysis and phylogenetic relationships
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The complete chloroplast genome sequences of six Hylotelephium species: Comparative genomic analysis and phylogenetic relationships
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Journal Article
The complete chloroplast genome sequences of six Hylotelephium species: Comparative genomic analysis and phylogenetic relationships
2023
Overview
To evaluate the phylogenetic relationships between Hylotelephium and Orostachys , and to provide important information for further studies, we analyzed the complete chloroplast genomes of six Hylotelephium species and compared the sequences to those of published chloroplast genomes of congeneric species and species of the closely related genus , Orostachys . The total chloroplast genome length of nineteen species, including the six Hylotelephium species analyzed in this study and the thirteen Hylotelephium and Orostachys species analyzed in previous studies, ranged from 150,369 bp ( O . minuta ) to 151,739 bp ( H . spectabile ). Their overall GC contents were almost identical (37.7–37.8%). The chloroplast genomes of the nineteen species contained 113 unique genes comprising 79 protein-coding genes (PCGs), 30 transfer RNA genes (tRNAs), and four ribosomal RNA genes (rRNAs). Among the annotated genes, fourteen genes contained one intron, and two genes contained two introns. The chloroplast genomes of the nineteen Hylotelephium and Orostachys species had identical structures. Additionally, the large single copy (LSC), inverted repeat (IR), and small single copy (SSC) junction regions were conserved in the Hylotelephium and Orostachys species. The nucleotide diversity between the Hylotelephium chloroplast genomes was extremely low in all regions, and only one region showed a high Pi value (>0.03). In all nineteen chloroplast genomes, six regions had a high Pi value (>0.03). The phylogenetic analysis showed that the genus delimitation could not be clearly observed even in this study because Hylotelephium formed a paraphyly with subsect. Orostachys of the genus Orostachys . Additionally, the data supported the taxonomic position of Sedum taqeutii , which was treated as a synonym for H . viridescens in previous studies, as an independent taxon.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Computer and Information Sciences
/ Genes
/ Genomes
/ Genomics
/ Identification and classification
/ Introns
/ RNA
/ rRNA
/ Species
/ Taxonomy
