Apr 29, 2020

New alignment-based sequence extraction software (ALiBaSeq) and its utility for deep level phylogenetics

BioRxiv : the Preprint Server for Biology
Alexander KnyshovC. Weirauch


Motivation: Despite many bioinformatic solutions for analyzing sequencing data, few options exist for targeted sequence retrieval from whole genomic sequencing (WGS) data. Available tools especially struggle at deep phylogenetic levels and necessitate amino-acid space searches, increasing rates of false positive results. Many such tools also suffer from difficult installation processes and lack adequate user resources. Results: Here, we describe a program using freely available similarity search tools to find homologs in assembled WGS data with unparalleled freedom to modify parameters. We evaluate its performance as well as that of other bioinformatics tools on two divergent insect species (>200 My) for which annotated genomes exist, as well as on one large set each of highly conserved and more variable loci. Our software is capable of retrieving orthologs from well-curated, low and high depth shotgun, and target capture assemblies as well or better than other software in finding the most genes with maximal coverage and has a low comparable rate of false positives throughout all datasets. Availability and Implementation: The software (implemented in Python), tutorials, and manual is freely available at https://github.com/AlexK...Continue Reading

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