Abstract:
:Low-coverage whole-genome sequencing followed by imputation has been proposed as a cost-effective genotyping approach for disease and population genetics studies. However, its competitiveness against SNP arrays is undermined because current imputation methods are computationally expensive and unable to leverage large reference panels. Here, we describe a method, GLIMPSE, for phasing and imputation of low-coverage sequencing datasets from modern reference panels. We demonstrate its remarkable performance across different coverages and human populations. GLIMPSE achieves imputation of a genome for less than US$1 in computational cost, considerably outperforming other methods and improving imputation accuracy over the full allele frequency range. As a proof of concept, we show that 1× coverage enables effective gene expression association studies and outperforms dense SNP arrays in rare variant burden tests. Overall, this study illustrates the promising potential of low-coverage imputation and suggests a paradigm shift in the design of future genomic studies.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Rubinacci S,Ribeiro DM,Hofmeister RJ,Delaneau Odoi
10.1038/s41588-020-00756-0subject
Has Abstractpub_date
2021-01-01 00:00:00pages
120-126issue
1eissn
1061-4036issn
1546-1718pii
10.1038/s41588-020-00756-0journal_volume
53pub_type
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