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- Title
Comparative analyses of complete chloroplast genomes reveal interspecific difference and intraspecific variation of Tripterygium genus.
- Authors
Kai-Ling Xu; Zhong-Mou Zhang; Wen-Liang Fang; Ya-Dan Wang; Hong-Yu Jin; Feng Wei; Shuang-Cheng Ma
- Abstract
The genus Tripterygium was of great medicinal value and attracted much attention on the taxonomic study using morphological and molecular methods. In this study, we assembled 12 chloroplast genomes of Tripterygium to reveal interspecific difference and intraspecific variation. The sequence length (156,692-157,061 bp) and structure of Tripterygium were conserved. Comparative analyses presented abundant variable regions for further study. Meanwhile, we determined the ndhB gene under positive selection through adaptive evolution analysis. And the phylogenetic analyses based on 15 chloroplast genomes supported the monophyly of Tripterygium hypoglaucum and the potential sister relationship between Tripterygium wilfordii and Tripterygium regelii. Molecular dating analysis indicated that the divergence time within Tripterygium was approximately 5.99 Ma (95% HPD = 3.11-8.68 Ma). The results in our study provided new insights into the taxonomy, evolution process, and phylogenetic construction of Tripterygium using complete plastid genomes.
- Subjects
CHLOROPLAST DNA; BIOLOGICAL evolution; CHLOROPLASTS; COMPARATIVE studies; HYPERVARIABLE regions
- Publication
Frontiers in Plant Science, 2024, p1
- ISSN
1664-462X
- Publication type
Article
- DOI
10.3389/fpls.2023.1288943