Genome Science
Long-Read Sequencing
Structural variation, repeat expansions and phased assemblies.
Scientific context
Understanding the field
Long-read platforms are applied to regions inaccessible to short reads, including tandem repeats, segmental duplications and complex rearrangements.
Long-read sequencing captures DNA or RNA molecules across regions that short reads cannot resolve reliably. It improves analysis of repeat expansions, structural variants, isoforms and haplotype phase.
Central questions
- Which complex variants are missed by standard assays?
- How can complete haplotypes improve interpretation?
Methodological framework
- High-fidelity and ultra-long-read sequencing
- De novo assembly and haplotype phasing
- Structural-variant and repeat analysis
Relevance
Scientific and clinical value
Long reads extend discovery into medically and evolutionarily important regions, support more complete assemblies and can resolve variants obscured by repetitive sequence.
Limits and responsibility
Platform-specific errors, DNA quality, coverage and computational pipelines affect performance. Orthogonal confirmation and fit-for-purpose validation remain important in diagnostic settings.
Authoritative resources
Public reference resources
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