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selscan: An Efficient Multithreaded Program to Perform EHH-Based Scans for Positive Selection

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Szpiech, Z. A., Hernandez, R. D.·2014·Molecular Biology and Evolution

Abstract

Haplotype-based scans to detect natural selection are useful to identify recent or ongoing positive selection in genomes. As both real and simulated genomic data sets grow larger, spanning thousands of samples and millions of markers, there is a need for a fast and efficient implementation of these scans for general use. Here, we present selscan, an efficient multithreaded application that implements Extended Haplotype Homozygosity (EHH), Integrated Haplotype Score (iHS), and Cross-population EHH (XPEHH). selscan accepts phased genotypes in multiple formats, including TPED, and performs extremely well on both simulated and real data and over an order of magnitude faster than existing available implementations. It calculates iHS on chromosome 22 (22,147 loci) across 204 CEU haplotypes in 353 s on one thread (33 s on 16 threads) and calculates XPEHH for the same data relative to 210 YRI haplotypes in 578 s on one thread (52 s on 16 threads). Source code and binaries (Windows, OSX, and Linux) are available at https://github.com/szpiech/selscan.

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Metadata

Authors
Szpiech, Z. A., & Hernandez, R. D.
Venue
Molecular Biology and Evolution
Published
2014-07-10
Volume
31
Issue
10
Pages
2824-2827
ISSN
  • 0737-4038 (ISSN-L)
  • 1537-1719
OpenAlex
W2133298050
Cited by
797
References
5
FWCI
13.47
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: selscan: An Efficient Multithreaded Program to Perform EHH-Based Scans for Positive Selection. https://app.cochat.ai/papers/10.1093/molbev/msu211
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Szpiech, Z. A., & Hernandez, R. D. (2014). selscan: An Efficient Multithreaded Program to Perform EHH-Based Scans for Positive Selection. Molecular Biology and Evolution. https://doi.org/10.1093/molbev/msu211

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