{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T10:33:57Z","timestamp":1787567637622,"version":"build-2736575974"},"reference-count":79,"publisher":"eLife Sciences Publications, Ltd","license":[{"start":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T00:00:00Z","timestamp":1755561600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T00:00:00Z","timestamp":1755561600000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T00:00:00Z","timestamp":1755561600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["1R01AI145852"],"award-info":[{"award-number":["1R01AI145852"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["elifesciences.org"],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>\n                    Genomic surveillance is crucial for identifying at-risk populations for targeted malaria control and elimination. Identity-by-descent (IBD) is increasingly being used in\n                    <jats:italic>Plasmodium<\/jats:italic>\n                    population genomics to estimate genetic relatedness, effective population size (\n                    <jats:italic>N<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>e<\/jats:italic>\n                    <\/jats:sub>\n                    ), population structure, and signals of positive selection. Despite its potential, a thorough evaluation of IBD segment detection tools for species with high recombination rates, such as\n                    <jats:italic>Plasmodium falciparum<\/jats:italic>\n                    , remains absent. Here, we perform comprehensive benchmarking of IBD callers \u2013 probabilistic (&lt;monospace&gt;hmmIBD&lt;\/monospace&gt;, &lt;monospace&gt;isoRelate&lt;\/monospace&gt;), identity-by-state-based (&lt;monospace&gt;hap-IBD&lt;\/monospace&gt;, &lt;monospace&gt;phased IBD&lt;\/monospace&gt;) and others (&lt;monospace&gt;Refined IBD&lt;\/monospace&gt;) \u2013 using population genetic simulations tailored for high recombination, and IBD quality metrics at both the IBD segment level and the IBD-based downstream inference level. Our results demonstrate that low marker density per genetic unit, related to high recombination relative to mutation, significantly compromises the accuracy of detected IBD segments. In genomes with high recombination rates resembling\n                    <jats:italic>P. falciparum<\/jats:italic>\n                    , most IBD callers exhibit high false negative rates for shorter IBD segments, which can be partially mitigated through optimization of IBD caller parameters, especially those related to marker density. Notably, IBD detected with optimized parameters allows for more accurate capture of selection signals and population structure; IBD-based\n                    <jats:italic>N<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>e<\/jats:italic>\n                    <\/jats:sub>\n                    inference is very sensitive to IBD detection errors, with IBD called from &lt;monospace&gt;hmmIBD&lt;\/monospace&gt; uniquely providing less biased estimates of\n                    <jats:italic>N<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>e<\/jats:italic>\n                    <\/jats:sub>\n                    in this context. Validation with empirical data from the MalariaGEN\n                    <jats:italic>Pf<\/jats:italic>\n                    7 database, representing different transmission settings, corroborates these findings. We conclude that context-specific evaluation and parameter optimization are essential for accurate IBD detection in high-recombining species and recommend &lt;monospace&gt;hmmIBD&lt;\/monospace&gt; for\n                    <jats:italic>Plasmodium<\/jats:italic>\n                    species, especially for quality-sensitive analyses, such as estimation of\n                    <jats:italic>N<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>e<\/jats:italic>\n                    <\/jats:sub>\n                    . Our optimization and high-level benchmarking methods not only improve IBD segment detection in high-recombining genomes but also enhance overall genomic analysis, paving the way for more accurate genomic surveillance and targeted intervention strategies for malaria.\n                  <\/jats:p>","DOI":"10.7554\/elife.101924","type":"journal-article","created":{"date-parts":[[2025,1,6]],"date-time":"2025-01-06T12:26:17Z","timestamp":1736166377000},"update-policy":"https:\/\/doi.org\/10.7554\/elife.101924","source":"Crossref","is-referenced-by-count":0,"title":["Benchmarking and optimization of methods for the detection of identity-by-descent in high-recombining Plasmodium falciparum genomes"],"prefix":"10.7554","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3998-5981","authenticated-orcid":true,"given":"Bing","family":"Guo","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/055yg0521","id-type":"ROR","asserted-by":"publisher"}],"name":"Center for 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