FLASH: fast length adjustment of short reads to improve genome assemblies
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ID: 289158
2011
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Abstract
Abstract Motivation: Next-generation sequencing technologies generate very large numbers of short reads. Even with very deep genome coverage, short read lengths cause problems in de novo assemblies. The use of paired-end libraries with a fragment size shorter than twice the read length provides an opportunity to generate much longer reads by overlapping and merging read pairs before assembling a genome. Results: We present FLASH, a fast computational tool to extend the length of short reads by overlapping paired-end reads from fragment libraries that are sufficiently short. We tested the correctness of the tool on one million simulated read pairs, and we then applied it as a pre-processor for genome assemblies of Illumina reads from the bacterium Staphylococcus aureus and human chromosome 14. FLASH correctly extended and merged reads >99% of the time on simulated reads with an error rate of <1%. With adequately set parameters, FLASH correctly merged reads over 90% of the time even when the reads contained up to 5% errors. When FLASH was used to extend reads prior to assembly, the resulting assemblies had substantially greater N50 lengths for both contigs and scaffolds. Availability and Implementation: The FLASH system is implemented in C and is freely available as open-source code at http://www.cbcb.umd.edu/software/flash. Contact: t.magoc@gmail.com
| Reference Key |
openalex_W2157107905
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|---|---|
| Authors | Tanja Magoč, Steven L. Salzberg |
| Journal | BMC Bioinformatics |
| Year | 2011 |
| DOI |
10.1093/bioinformatics/btr507
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| URL | |
| Keywords | Keywords not found |
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