Evidence map›Paper›PMID 41673557›Full record

ArticleBMC genomics2026

Analysis and comparison of chloroplast genome codon usage patterns in five accessions of Toxicodendron vernicifluum.

Yirong Zhu, Hanyan Feng, Xiangtao Yang, Rong Xu, Cai Wang, Jinde Yu, Dan Zong

Abstract readComparative Study
In one paragraph

Article in BMC genomics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Yirong ZhuForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China.
Hanyan FengForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China.
Xiangtao YangForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China.
Rong XuForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China.
Cai WangForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China.
Jinde YuForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China. yusundt@163.com.ORCID http://orcid.org/0009-0009-0020-8884
Dan ZongForest Resources Exploitation and Utilization Engineering Research Center for Grand Health of Yunnan Provincial Universities, Southwest Forestry University, Kunming, 650224, China. skyzd907@swfu.edu.cn.ORCID http://orcid.org/0000-0003-4984-4557

Funding

germplasm innovation and efficient cultivation technology of specialty industrial raw material forests 202302AE090002-03Yunnan agricultural basic research joint special area project 202301BD070001-040
6 · The paper itself

Abstract

backgroundThe chloroplast (cp.) is the photosynthetic organelle of plants and algae, responsible for acquiring essential energy. It possesses relatively independent genetic material, a highly conserved structure, a small genome size, and low mutation and recombination rates. Consequently, the chloroplast genome plays a crucial role in elucidating the origin, evolution, and phylogenetic relationships of species. Toxicodendron vernicifluum, belonging to the family Anacardiaceae, is an important special economic forest distributed in Yunnan, Sichuan and Guizhou provinces of China. Codon preference is a universal phenomenon in the genomes of prokaryotes and eukaryotes. The formation of codon preference is mainly influenced by the natural selection and mutation pressure. Studying the codon preference of plant chloroplast genome is helpful to determine the optimal codon design and vector design in chloroplast genetic engineering.

resultsAnalysis of the codon utilization patterns in the chloroplast genomes of five T. vernicifluum accessions revealed a high degree of similarity among them. All five accessions exhibited similar base compositions, with high A/T content and low G/C content and a preference for A/T-ending codons. 6 optimal codons were identified in each chloroplast genome of the five T. vernicifluum accessions, and all end with A/T. According to the ENc-plot, PR2-plot and neutrality-plot, the formation of codon preference T. vernicifluum was affected by multiple factors, and natural selection was the dominant factor. Arabidopsis thaliana, Populus trichocarpa and Saccharomyces cerevisiae have potential value as the heterologous expression host for five accessions of T. vernicifluum genes.

conclusionsThis study highlights the remarkable similarity in codon usage patterns among the five accessions of T. vernicifluum chloroplast genomes, driven by natural selection. Understanding the gene expression characteristics of T. vernicifluum and elucidating the laws governing its genetic evolution are facilitated by investigating the codon preferences in these accessions. Our results provide an important theoretical basis for evolutionary analysis and transgenic research of chloroplast genes.

Indexed as

Codon UsageGenome, ChloroplastBase CompositionCodonEvolution, MolecularPhylogenyCodonChloroplast genomeCodon usage biasNatural selectionToxicodendron vernicifluum

Identifiers

PMID41673557
PMCPMC12998142

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