phylonium

phylonium computes pairwise evolutionary distances between closely related genomes from whole-genome sequencing data to support comparative and epidemiological genomic analyses.

Key Features:

• Alignment-free approach: Uses an alignment-free methodology to compute pairwise genomic distances without performing full sequence alignments.
• Single-reference indexing: Indexes only a single reference genome based on a previously published method to reduce computational time and resource requirements while maintaining accuracy.
• Benchmarking accuracy: On a benchmark of 2678 Escherichia coli genomes from ENSEMBL, demonstrated superior accuracy to mash with default settings, while mash processed that dataset approximately four times faster.
• Efficiency: Reported to be approximately 100 times faster than its predecessor on large genomic datasets.
• Implementation: Implemented in C++.

Scientific Applications:

• Epidemiological surveillance: Estimation of evolutionary distances between pathogen genomes for tracking disease outbreaks.
• Outbreak investigation: Enables rapid comparisons of pathogen whole-genome sequences relevant to outbreak investigation and surveillance.
• Comparative and evolutionary genomics: Applicable to high-throughput analysis of closely related sequences in comparative genomic studies.

Methodology:

Alignment-free pairwise distance computation using single-reference genome indexing; benchmarking performed on 2678 Escherichia coli genomes from ENSEMBL with comparisons to mash.