Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data
Abstract Segments of indentity-by-descent (IBD) detected from high-density genetic data are useful for many applications, including long-range phase determination, phasing family data, imputation, IBD mapping, and heritability analysis in founder populations. We present Refined IBD, a new method for...
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2013
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Online Access: | http://dx.doi.org/10.1534/genetics.113.150029 https://academic.oup.com/genetics/article-pdf/194/2/459/49450061/genetics0459.pdf |
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croxfordunivpr:10.1534/genetics.113.150029 2024-10-13T14:09:42+00:00 Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data Browning, Brian L Browning, Sharon R 2013 http://dx.doi.org/10.1534/genetics.113.150029 https://academic.oup.com/genetics/article-pdf/194/2/459/49450061/genetics0459.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Genetics volume 194, issue 2, page 459-471 ISSN 1943-2631 journal-article 2013 croxfordunivpr https://doi.org/10.1534/genetics.113.150029 2024-09-24T04:07:24Z Abstract Segments of indentity-by-descent (IBD) detected from high-density genetic data are useful for many applications, including long-range phase determination, phasing family data, imputation, IBD mapping, and heritability analysis in founder populations. We present Refined IBD, a new method for IBD segment detection. Refined IBD achieves both computational efficiency and highly accurate IBD segment reporting by searching for IBD in two steps. The first step (identification) uses the GERMLINE algorithm to find shared haplotypes exceeding a length threshold. The second step (refinement) evaluates candidate segments with a probabilistic approach to assess the evidence for IBD. Like GERMLINE, Refined IBD allows for IBD reporting on a haplotype level, which facilitates determination of multi-individual IBD and allows for haplotype-based downstream analyses. To investigate the properties of Refined IBD, we simulate SNP data from a model with recent superexponential population growth that is designed to match United Kingdom data. The simulation results show that Refined IBD achieves a better power/accuracy profile than fastIBD or GERMLINE. We find that a single run of Refined IBD achieves greater power than 10 runs of fastIBD. We also apply Refined IBD to SNP data for samples from the United Kingdom and from Northern Finland and describe the IBD sharing in these data sets. Refined IBD is powerful, highly accurate, and easy to use and is implemented in Beagle version 4. Article in Journal/Newspaper Northern Finland Oxford University Press Genetics 194 2 459 471 |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Segments of indentity-by-descent (IBD) detected from high-density genetic data are useful for many applications, including long-range phase determination, phasing family data, imputation, IBD mapping, and heritability analysis in founder populations. We present Refined IBD, a new method for IBD segment detection. Refined IBD achieves both computational efficiency and highly accurate IBD segment reporting by searching for IBD in two steps. The first step (identification) uses the GERMLINE algorithm to find shared haplotypes exceeding a length threshold. The second step (refinement) evaluates candidate segments with a probabilistic approach to assess the evidence for IBD. Like GERMLINE, Refined IBD allows for IBD reporting on a haplotype level, which facilitates determination of multi-individual IBD and allows for haplotype-based downstream analyses. To investigate the properties of Refined IBD, we simulate SNP data from a model with recent superexponential population growth that is designed to match United Kingdom data. The simulation results show that Refined IBD achieves a better power/accuracy profile than fastIBD or GERMLINE. We find that a single run of Refined IBD achieves greater power than 10 runs of fastIBD. We also apply Refined IBD to SNP data for samples from the United Kingdom and from Northern Finland and describe the IBD sharing in these data sets. Refined IBD is powerful, highly accurate, and easy to use and is implemented in Beagle version 4. |
format |
Article in Journal/Newspaper |
author |
Browning, Brian L Browning, Sharon R |
spellingShingle |
Browning, Brian L Browning, Sharon R Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data |
author_facet |
Browning, Brian L Browning, Sharon R |
author_sort |
Browning, Brian L |
title |
Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data |
title_short |
Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data |
title_full |
Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data |
title_fullStr |
Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data |
title_full_unstemmed |
Improving the Accuracy and Efficiency of Identity-by-Descent Detection in Population Data |
title_sort |
improving the accuracy and efficiency of identity-by-descent detection in population data |
publisher |
Oxford University Press (OUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1534/genetics.113.150029 https://academic.oup.com/genetics/article-pdf/194/2/459/49450061/genetics0459.pdf |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Genetics volume 194, issue 2, page 459-471 ISSN 1943-2631 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1534/genetics.113.150029 |
container_title |
Genetics |
container_volume |
194 |
container_issue |
2 |
container_start_page |
459 |
op_container_end_page |
471 |
_version_ |
1812816761541623808 |