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DNA Isolation

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Updated: Mar 29, 2026

Rare Event Detection Using Error-corrected DNA and RNA Sequencing

Rare Event Detection Using Error-corrected DNA and RNA Sequencing

Published on: August 3, 2018

A method for positive forensic identification of samples from extremely low-coverage sequence data.

Samuel H Vohr¹, Carlos Fernando Buen Abad Najar², Beth Shapiro³

¹Department of Biomolecular Engineering, University of California, Santa Cruz, 1156 High St, Santa Cruz, CA, 95064, USA. svohr@ucsc.edu.

|December 9, 2015

Summary

This summary is machine-generated.

A new method accurately identifies if DNA samples are from the same individual, even with limited DNA. This technique uses single nucleotide polymorphism (SNP) markers and linkage disequilibrium for reliable results with low-coverage DNA sequencing.

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Area of Science:

Genetics
Bioinformatics
Forensic Science

Background:

Assessing DNA sample identity is challenging with limited DNA, common in ancient, historic, and forensic contexts.
Existing methods using multi-allelic markers fail with low DNA quantities.

Purpose of the Study:

To develop a novel method for determining if two DNA samples originate from the same individual using shotgun DNA sequence data.
To overcome limitations of current methods when dealing with minute DNA quantities.

Main Methods:

Utilizes extensive single nucleotide polymorphism (SNP) marker catalogs to maximize discriminatory allele observation.
Employs linkage disequilibrium patterns, modeled by haplotype reference panels, to indirectly compare linked SNP observations.
Applies coalescent simulations and real sequencing data from diverse sources for validation.

Main Results:

The new method accurately assesses DNA sample identity from low-coverage shotgun sequencing data (less than 1% genome coverage).
Demonstrates robustness concerning the reference panel used.
Successfully detects positive identity even with highly degraded or limited DNA samples.

Conclusions:

Presents a powerful new approach for DNA sample individualization.
Enables reliable DNA origin determination from minute DNA quantities, advancing forensic and ancient DNA analysis.