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Aardvark: sifting through differences in a mound of variants
James M Holt1, Christopher T Saunders2, Egor Dolzhenko2
1PacBio, 1305 O'Brien Drive, Menlo Park, 94025, CA, USA. mholt@pacificbiosciences.com.
Genome Biology
|June 19, 2026
Summary
Aardvark is a new variant benchmarking tool that uses a basepair score to compare haplotype sequences, reducing bias and improving accuracy for genomic analysis. It handles small variants, tandem repeats, and structural variations efficiently.
Area of Science:
- Genomics
- Bioinformatics
- Computational Biology
Background:
- Accurate variant benchmarking is essential for evaluating genomic secondary pipelines.
- Traditional tools struggle with representation biases and complex variations like tandem repeats and structural variants.
Purpose of the Study:
- Introduce Aardvark, a novel variant benchmarking tool.
- Address limitations of existing tools by reducing representation biases and accommodating diverse variant types.
Main Methods:
- Developed Aardvark with a novel basepair score for direct haplotype sequence comparison.
- Integrated traditional genotype scoring and support for benchmarking small variants, tandem repeats, and structural variants (<10 kb).
- Ensured compatibility with standard input formats.
Main Results:
- Aardvark reduces representation biases through basepair scoring, allowing partial credit.
- The tool offers significantly faster performance, running approximately 18x faster than hap.py.
- Supports comprehensive benchmarking across various variant types.
Conclusions:
- Aardvark provides a more accurate and efficient method for variant benchmarking.
- The basepair score and comprehensive variant type support enhance genomic pipeline evaluation.
- Aardvark is an open-source tool promoting accessibility and further development.
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