Intraspecific Differentiation of Styrax japonicus (Styracaceae) as Revealed by Comparative Chloroplast and Evolutionary Analyses
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View abstract on PubMed
Summary
This summary is machine-generated.This study sequenced the chloroplast genomes of Styrax japonicus, identifying mutation hotspots for DNA barcoding and revealing adaptive evolution. Findings offer insights into the evolutionary lineage and variety differentiation of this species.
Area Of Science
- Plant genomics
- Molecular evolution
- Phylogenetics
Background
- Styrax japonicus (Japanese Snowbell) is a significant medicinal and ornamental shrub from the Styracaceae family.
- Understanding its chloroplast genome diversity is crucial for evolutionary and applied studies.
Purpose Of The Study
- To sequence and compare the chloroplast genomes of four naturally distributed Styrax japonicus individuals.
- To identify potential DNA barcode markers and analyze evolutionary pressures and phylogenetic relationships.
Main Methods
- Whole chloroplast genome sequencing and comparative analysis.
- DNA polymorphism analysis to identify mutation hotspots.
- Selection pressure analysis and phylogenetic reconstruction.
Main Results
- The four chloroplast genomes (157,914–157,962 bp) showed a conserved quadripartite structure (LSC, SSC, IRa, IRb).
- Three coding genes (infA, psbK, rpl33) and five intergenic regions were identified as mutation hotspots, suitable for DNA barcoding.
- A small contraction in the IR region and positive selection on ycf1 and ndhD genes were observed, suggesting adaptive evolution. Conflicting phylogenetic signals indicated divergent evolutionary paths.
Conclusions
- The chloroplast genome structure of Styrax japonicus is highly conserved.
- Specific genetic markers were identified for DNA barcoding and population studies.
- The study provides insights into the adaptive evolution and genetic differentiation of Styrax japonicus varieties.
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