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Human and animal genetic studies have established that delay discounting is heritable, but only a few associated genes have been identified. We aimed to identify novel genetic loci associated with delay discounting through a genome\u2010wide association study (GWAS) using Heterogeneous Stock (HS) rats, a genetically diverse outbred population derived from eight inbred founder strains. We assessed delay discounting in 650 male and female HS rats using an adjusting amount procedure in which rats chose between smaller immediate sucrose rewards or a larger reward at various delays. Preference switch points were calculated and both exponential and hyperbolic functions were fitted to these indifference points. Area under the curve (AUC) and the discounting parameter <jats:italic>k<\/jats:italic> of both functions were used as delay discounting measures. GWAS for AUC, exponential <jats:italic>k<\/jats:italic>, and one indifference point identified significant loci on chromosomes 20 and 14. The gene <jats:italic>Slc35f1<\/jats:italic>, which encodes a member of the solute carrier family, was the sole gene within the chromosome 20 locus. That locus also contained an eQTL for <jats:italic>Slc35f1<\/jats:italic>, suggesting that heritable differences in the expression might be responsible for the association with behavior. <jats:italic>Adgrl3<\/jats:italic>, which encodes a latrophilin subfamily G\u2010protein coupled receptor, was the sole gene within the chromosome 14 locus. These findings implicate novel genes in delay discounting and highlight the need for further exploration.<\/jats:p>","DOI":"10.1111\/gbb.12909","type":"journal-article","created":{"date-parts":[[2024,8,9]],"date-time":"2024-08-09T11:36:37Z","timestamp":1723203397000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Genome\u2010wide association study of delay discounting in <scp>Heterogeneous Stock<\/scp> rats"],"prefix":"10.1111","volume":"23","author":[{"given":"Montana Kay","family":"Lara","sequence":"first","affiliation":[{"name":"Department of Psychiatry University of California San Diego  La Jolla California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Apurva S.","family":"Chitre","sequence":"additional","affiliation":[{"name":"Department of Psychiatry University of California San Diego  La Jolla California 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