Toward comprehensive genomics analysis with de novo assembly.

Author(s): Chin, Jason and Peluso, Paul and Rank, David

Whole genome sequencing can provide comprehensive information important for determining the biochemical and genetic nature of all elements inside a genome. The high-quality genome references produced from past genome projects and advances in short-read sequencing technologies have enabled quick and cheap analysis for simple variants. However even with the focus on genome-wide resequencing for SNPs, the heritability of more than 50% of human diseases remains elusive. For non-human organisms, high-contiguity references are deficient, limiting the analysis of genomic features. The long and unbiased reads from single molecule, real-time (SMRT) Sequencing and new de novo assembly approaches have demonstrated the ability to detect more complicated variants and chromosome-level phasing. Moreover, with the recent advance of bioinformatics algorithms and tools, the computation tasks for completing high-quality de novo assembly of large genomes becomes feasible with commodity hardware. Ongoing development in sequencing technologies and bioinformatics will likely lead to routine generation of high-quality reference assemblies in the future. We discuss the current state of art and the challenges in bioinformatics toward such a goal. More specifically, explicit examples of pragmatic computational requirements for assembling mammalian-size genomes and algorithms suitable for processing diploid genomes are discussed.

Organization: PacBio
Year: 2015

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