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Updated: Jun 26, 2025
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
15.9K
Addressing pandemic-wide systematic errors in the SARS-CoV-2 phylogeny.
Martin Hunt1,2,3,4, Angie S Hinrichs5, Daniel Anderson1
1European Molecular Biology Laboratory - European Bioinformatics Institute, Hinxton, UK.
Biorxiv : the Preprint Server for Biology
|May 15, 2024
Summary
Researchers reprocessed SARS-CoV-2 sequencing data using a novel amplicon-aware tool, Viridian, to create a cleaner global phylogeny. This new resource improves SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) genomic analysis for science and public health.
Area of Science:
- Genomics and Bioinformatics
- Virology and Infectious Diseases
- Computational Biology
Background:
- The SARS-CoV-2 genome is the most highly sequenced globally, offering rich phylogenetic data for public health.
- Existing SARS-CoV-2 genome assemblies contain systematic errors due to variable amplicon schemes and inconsistent quality control.
- These errors significantly impact phylogenetic accuracy, necessitating extensive manual curation of viral trees.
Purpose of the Study:
- To reprocess all available public SARS-CoV-2 raw sequence data using a rigorous, amplicon-aware methodology.
- To construct a cleaner, more accurate global phylogeny of SARS-CoV-2.
- To provide a valuable, high-quality resource for researchers studying viral evolution and epidemiology.
Main Methods:
- Developed and utilized a novel assembly tool, Viridian, specifically designed for amplicon sequence data.
- Processed the complete set of public SARS-CoV-2 raw sequence data, assembling high-quality consensus sequences.
- Implemented rigorous quality control and amplicon-aware processing to eliminate artefactual errors and mask low-quality positions.
Main Results:
- Generated a global phylogenetic tree comprising 4,471,579 SARS-CoV-2 samples, representing all available public data as of June 2024.
- The Viridian tool successfully eliminated artefactual errors common in previous SARS-CoV-2 genome assemblies.
- Validated the methodology through simulation and empirical data, quantifying significant improvements in phylogenetic accuracy.
Conclusions:
- The reprocessing of SARS-CoV-2 data with Viridian provides a substantially improved and reliable global phylogeny.
- The Viridian tool and the resulting high-quality consensus sequences offer a valuable resource for the scientific community.
- This cleaner phylogenetic resource will enhance research in SARS-CoV-2 evolution, transmission dynamics, and public health interventions.
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