Cited by 236Genomics and Phylogenetic StudiesForensic and Genetic ResearchEnvironmental DNA in Biodiversity Studies

Analysis of High-Throughput Ancient DNA Sequencing Data

Kircher, Martin·2012·Methods in Molecular Biology

Abstract

Advances in sequencing technologies have dramatically changed the field of ancient DNA (aDNA). It is now possible to generate an enormous quantity of aDNA sequence data both rapidly and inexpensively. As aDNA sequences are generally short in length, damaged, and at low copy number relative to coextracted environmental DNA, high-throughput approaches offer a tremendous advantage over traditional sequencing approaches in that they enable a complete characterization of an aDNA extract. However, the particular qualities of aDNA also present specific limitations that require careful consideration in data analysis. For example, results of high-throughout analyses of aDNA libraries may include chimeric sequences, sequencing error and artifacts, damage, and alignment ambiguities due to the short read lengths. Here, I describe typical primary data analysis workflows for high-throughput aDNA sequencing experiments, including (1) separation of individual samples in multiplex experiments; (2) removal of protocol-specific library artifacts; (3) trimming adapter sequences and merging paired-end sequencing data; (4) base quality score filtering or quality score propagation during data analysis; (5) identification of endogenous molecules from an environmental background; (6) quantification of contamination from other DNA sources; and (7) removal of clonal amplification products or the compilation of a consensus from clonal amplification products, and their exploitation for estimation of library complexity.

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Crossref · 10.1007/978-1-61779-516-9_23

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  • Decreasing the -n edit distance parameter in bwa aln from the default value of 0.04 to 0.02 or 0.01 allows more mismatches and increases sensitivity.

    “decreasing the -n edit distance parameter from the default value of 0.04 to 0.02 [13] or 0.01 [14] allows more mismatches and increases sensitivity”
  • Using bwa aln with very relaxed parameters (-n 0.01 -o 2) in combination with disabling seeding (-l 1024) and mapQ 25 filtering had a beneficial impact in sensitivity (99.60% vs 97.34% for mapping reads containing the alternate allele) and a more balanced alternate allele representation (0.49936) but also increases error rates, for example increasing the rate of false mapping short microbial reads

    “This had a beneficial impact in terms of sensitivity (99.60% vs 97.34% for the mapping of reads containing the alternate allele) and a more balanced alternate allele representation (0.49936) but also increases error rates, for example increasing the rate of false mapping short microbial reads (Additional file 1: Fig. S9).”

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Authors
Kircher, M.
Affiliations
Max Planck Institute for Evolutionary Anthropology (DE)
Corresponding author
Kircher, Martin
Venue
Methods in Molecular Biology
Publisher
Humana Press
Published
2011-12-08
Volume
840
Pages
197-228
ISSN
  • 1064-3745 (ISSN-L)
  • 1940-6029
OpenAlex
W1507075706
Cited by
236
References
73
Citations by year
2026: 9 · 2025: 24 · 2024: 13 · 2023: 16 · 2022: 19 · 2021: 19 · 2020: 26 · 2019: 19 · 2018: 23 · 2017: 13 · 2016: 15 · 2015: 10 · 2014: 15 · 2013: 13 · 2012: 1
FWCI
12.42
Type
book chapter
Language
en
Open access
closed
Locations
  • Methods in molecular biology (publishedVersion)
  • PubMed (publishedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
Max-Planck-Institut für Evolutionäre Anthropologie
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
  • Physical Sciences › Environmental Science › Ecology › Environmental DNA in Biodiversity Studies
Keywords
ancient DNA, next-generation sequencing, sequencing data analysis, chimeric sequences, sequencing artifacts, adapter trimming, contamination quantification, clonal amplification, consensus sequence, library complexity, multiplexed sequencing, sample separation
MeSH terms
Base Sequence, DNA, Fossils, Molecular Sequence Data, Software, Gene Library, Sequence Analysis, DNA, High-Throughput Nucleotide Sequencing

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