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Redundans: an assembly pipeline for highly heterozygous genomes

Open access
Pryszcz, Leszek P., Gabaldón, Toni·2016·Nucleic Acids Research

Abstract

Many genomes display high levels of heterozygosity (i.e. presence of different alleles at the same loci in homologous chromosomes), being those of hybrid organisms an extreme such case. The assembly of highly heterozygous genomes from short sequencing reads is a challenging task because it is difficult to accurately recover the different haplotypes. When confronted with highly heterozygous genomes, the standard assembly process tends to collapse homozygous regions and reports heterozygous regions in alternative contigs. The boundaries between homozygous and heterozygous regions result in multiple assembly paths that are hard to resolve, which leads to highly fragmented assemblies with a total size larger than expected. This, in turn, causes numerous problems in downstream analyses such as fragmented gene models, wrong gene copy number, or broken synteny. To circumvent these caveats we have developed a pipeline that specifically deals with the assembly of heterozygous genomes by introducing a step to recognise and selectively remove alternative heterozygous contigs. We tested our pipeline on simulated and naturally-occurring heterozygous genomes and compared its accuracy to other existing tools. Our method is freely available at https://github.com/Gabaldonlab/redundans.

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Metadata

Authors
Pryszcz, L. P., & Gabaldón, T.
Venue
Nucleic Acids Research
Published
2016-04-29
Volume
44
Issue
12
Pages
e113-e113
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2344852138
Cited by
522
References
27
FWCI
15.50
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Redundans: an assembly pipeline for highly heterozygous genomes. https://app.cochat.ai/papers/10.1093/nar/gkw294
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Pryszcz, L. P., & Gabaldón, T. (2016). Redundans: an assembly pipeline for highly heterozygous genomes. Nucleic Acids Research. https://doi.org/10.1093/nar/gkw294

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