{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T18:14:42Z","timestamp":1784052882475,"version":"3.55.0"},"reference-count":94,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2024,12,20]],"date-time":"2024-12-20T00:00:00Z","timestamp":1734652800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"name":"State Wildlife Grants Program, administered jointly by the U.S. Fish and Wildlife Service and the Ohio Division of Wildlife"},{"name":"Ohio Biodiversity Conservation Partnership between The Ohio State University and the Ohio Division of Wildlife"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,8,23]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Conservation of threatened species can benefit from an evaluation of genes in the major histocompatibility complex (MHC), whose loci encode proteins that bind pathogens and are often under strong selection to maintain diversity in immune response to diseases. Despite this gene family\u2019s importance to disease resistance, little is known about these genes in reptiles including snakes. To address this issue, we assembled and annotated a highly contiguous genome assembly for the timber rattlesnake (Crotalus horridus), a pit viper which is threatened or endangered in parts of its range, and analyzed this new genome along with three other rattlesnake genomes to characterize snake MHC loci. We identified highly duplicated MHC Class I and Class II\u03b2 genes in all species typified by a genomic architecture of discrete gene clusters localized on chromosome 2. The number of loci varied between species from 14 to 23 for MHC I and from 8 to 32 for MHC II\u03b2 and was greater than previously identified in the few non-genome-based studies of reptile MHC to date. We present evidence of the gene family\u2019s complex evolutionary history, with extensive duplication and loss concurrent with speciation resulting in incomplete lineage sorting. The differences in gene number between species combined with a dynamic evolutionary history suggest that gene family expansion\/contraction via rapid duplication\/gene loss may represent an important mechanism for generating genetic diversity in rattlesnake MHC. Our work demonstrates the utility of whole-genome sequences for identifying functional genetic variation in the form of MHC genes relevant for conservation genomic studies in threatened snakes.<\/jats:p>","DOI":"10.1093\/jhered\/esae075","type":"journal-article","created":{"date-parts":[[2024,12,18]],"date-time":"2024-12-18T15:35:17Z","timestamp":1734536117000},"page":"591-602","source":"Crossref","is-referenced-by-count":4,"title":["Insights from the timber rattlesnake (<i>Crotalus horridus<\/i>) genome for MHC gene architecture and evolution in threatened rattlesnakes"],"prefix":"10.1093","volume":"116","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-4054-415X","authenticated-orcid":false,"given":"Marissa A","family":"Roseman","sequence":"first","affiliation":[{"name":"School of Environment and Natural Resources, The Ohio State University , Columbus, OH ,","place":["United States"]},{"name":"Ohio Biodiversity Conservation Partnership, The Ohio State University , Columbus, OH ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0297-1313","authenticated-orcid":false,"given":"Andrew J","family":"Mason","sequence":"additional","affiliation":[{"name":"Ohio Biodiversity Conservation Partnership, The Ohio State University , Columbus, OH ,","place":["United States"]},{"name":"Department of Evolution, Ecology and Organismal Biology, The Ohio State University , Columbus, OH ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emily R","family":"Bode","sequence":"additional","affiliation":[{"name":"Department of Evolution, Ecology and Organismal Biology, The Ohio State University , Columbus, OH ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peri E","family":"Bolton","sequence":"additional","affiliation":[{"name":"Ohio Biodiversity Conservation Partnership, The Ohio State University , Columbus, OH ,","place":["United States"]},{"name":"Department of Evolution, Ecology and Organismal Biology, The Ohio State University , Columbus, OH ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro G","family":"Nachtigall","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Toxinologia Aplicada, CeTICS, Instituto Butantan , S\u00e3o Paulo ,","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William E","family":"Peterman","sequence":"additional","affiliation":[{"name":"School of Environment and Natural Resources, The Ohio State University , Columbus, OH ,","place":["United States"]},{"name":"Ohio Biodiversity Conservation Partnership, The Ohio State University , Columbus, OH ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7461-3393","authenticated-orcid":false,"given":"H Lisle","family":"Gibbs","sequence":"additional","affiliation":[{"name":"Ohio Biodiversity Conservation Partnership, The Ohio State University , Columbus, OH ,","place":["United States"]},{"name":"Department of Evolution, Ecology and Organismal Biology, The Ohio State University , Columbus, OH ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2024,12,20]]},"reference":[{"key":"2025090410514961100_CIT0001","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1016\/j.tree.2006.05.010","article-title":"Is MHC enough for understanding wildlife immunogenetics","volume":"21","author":"Acevedo-Whitehouse","year":"2006","journal-title":"Trends Ecol Evol"},{"key":"2025090410514961100_CIT0002","doi-asserted-by":"crossref","DOI":"10.1093\/oso\/9780198856566.001.0001","volume-title":"Conservation and the genomics of populations","author":"Allendorf","year":"2022","edition":"3rd 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