RECORD: Reference-Assisted Genome Assembly for Closely Related Genomes

Background. Next-generation sequencing technologies are now producing multiple times the genome size in total reads from a single experiment. This is enough information to reconstruct at least some of the differences between the individual genome studied in the experiment and the reference genome of...

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Published in:International journal of genomics 2015-01, Vol.2015 (2015), p.1-10
Main Authors: Buza, Krisztian, Dojer, Norbert, Wilczynski, Bartek
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Language:English
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Deoxyribonucleic acid
DNA
Experiments
Genomes
R&D
Research & development
Studies
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Wilczynski, Bartek
description Background. Next-generation sequencing technologies are now producing multiple times the genome size in total reads from a single experiment. This is enough information to reconstruct at least some of the differences between the individual genome studied in the experiment and the reference genome of the species. However, in most typical protocols, this information is disregarded and the reference genome is used. Results. We provide a new approach that allows researchers to reconstruct genomes very closely related to the reference genome (e.g., mutants of the same species) directly from the reads used in the experiment. Our approach applies de novo assembly software to experimental reads and so-called pseudoreads and uses the resulting contigs to generate a modified reference sequence. In this way, it can very quickly, and at no additional sequencing cost, generate new, modified reference sequence that is closer to the actual sequenced genome and has a full coverage. In this paper, we describe our approach and test its implementation called RECORD. We evaluate RECORD on both simulated and real data. We made our software publicly available on sourceforge. Conclusion. Our tests show that on closely related sequences RECORD outperforms more general assisted-assembly software.
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subjects Deoxyribonucleic acid
DNA
Experiments
Genomes
R&D
Research & development
Studies
title RECORD: Reference-Assisted Genome Assembly for Closely Related Genomes
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