An Algorithm to Build a Multi-genome Reference

Rabbani, L.; Mueller, J.; Weigel, D.

doi:10.1101/2020.04.11.036871

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bioRxiv · 10.1101/2020.04.11.036871

An Algorithm to Build a Multi-genome Reference

Rabbani, L.·Mueller, J.·Weigel, D.

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Abstract

1MotivationNew DNA sequencing technologies have enabled the rapid analysis of many thousands of genomes from a single species. At the same time, the conventional approach of mapping sequencing reads against a single reference genome sequence is no longer adequate. However, even where multiple high-quality reference genomes are available, the problem remains how one would integrate results from pairwise analyses. ResultTo overcome the limits imposed by mapping sequence reads against a single reference genome, or serially mapping them against multiple reference genomes, we have developed the MGR method that allows simultaneous comparison against multiple high-quality reference genomes, in order to remove the bias that comes from using only a single-genome reference and to simplify downstream analyses. To this end, we present the MGR algorithm that creates a graph (MGR graph) as a multi-genome reference. To reduce the size and complexity of the multi-genome reference, highly similar orthologous1 and paralogous2 regions are collapsed while more substantial differences are retained. To evaluate the performance of our model, we have developed a genome compression tool, which can be used to estimate the amount of shared information between genomes. Availabilityhttps://github.com/LeilyR/Multi-genome-Reference.git Contactweigel@tue.mpg.de

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Rabbani, L., Mueller, J., Weigel, D.. 2020-04-13. An Algorithm to Build a Multi-genome Reference. https://doi.org/10.1101/2020.04.11.036871

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