Collection, Characterizaton and Conservation of Genetic Resources of Yam Cultivars From Ekiti State, Nigeria

Collection, Characterizaton and Conservation of Genetic Resources of Yam Cultivars From Ekiti State, Nigeria | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Short Report Collection, Characterizaton and Conservation of Genetic Resources of Yam Cultivars From Ekiti State, Nigeria Julius Olaoye Faluyi, Joshua Olumide Matthew, Sekinat Okiki Azeez This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-899870/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 3 You are reading this latest preprint version Abstract This study was initiated to restore the genetic resources of yam which had been decimated in a core yam-producing community in Ekiti State, Southwestern Nigeria. Twenty cultivars, consisting of Dioscorea rotundata, D. cayenensis, D. alata , and D. dumetorum were identified, collected, characterized and multiplied using an On-farm Participatory Method. The yam cultivars were characterized for quality and yield of pounded yam ( iyan ) as well as starch properties. They were later conserved in the Teaching and Research Farm of the Obafemi Awolowo University Ile-Ife. Morphological characterization separated Dioscorea alata ( Ewura ) by its winged vines while Dioscorea dumetorum ( Esuru ) was separated by its pubescent spines, trifoliate leaf with acute apex and base and the clustered, irregularly-shaped tuber. All the tubers of the yam cultivars had high storability. Pounded yam quality rated the Ikumo and Ajimokun cultivars as best while Odo was rated average and this was attributed to the swelling properties and amylose content of these cultivars. Yam cultivars with high granules had low swelling capacities. The Brittle Fraction Index of the starch from all the cultivars was lower than 1.0 explaining why the iyan they produced had no crust on the surface and kept for long hours after preparation. From this study, it was concluded that the local yam cultivars collected represent the core of yam genetic resources for utilization in the region. These cultivars are therefore recommended for prioritization in further studies on propagation, conservation and improvement so that a narrow genetic base of cultivars is not encouraged, for example, by promoting cultivars whose vines perform well in tuberization. Botany Dioscorea cultivars collection conservation pounded yam starch properties Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 07 Oct, 2021 Editor assigned by journal 11 Sep, 2021 First submitted to journal 11 Sep, 2021 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-899870","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Short Report","associatedPublications":[],"authors":[{"id":56004319,"identity":"c6ef8b97-72c9-478d-b2f8-69d8ee9ce247","order_by":0,"name":"Julius Olaoye Faluyi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAx0lEQVRIiWNgGAWjYBACxuYDjAcYGCTkQJwDD4jS0pbAANJiDNaSQJQ1bGAtDIkNIA5RWpjbmB8c5m2zSJ8fdvgh0BY7Od0Ggg5jMwBqkcjdeDvNAKgl2djsACEt8xugWmYngLQcSNxGUEsb+weQlnTD2ekfiNXCA7YlQV46h2hbeAoOzjknYbhBOqfgQIIBEX4xbGPf+OBNWZ28/Oz0zR8+VNjJEdbSALKKjYHBAKzSgIByEJAHk3+AjAYiVI+CUTAKRsHIBABgwkc/FR1VuwAAAABJRU5ErkJggg==","orcid":"https://orcid.org/0000-0001-7478-7078","institution":"University of Ife: Obafemi Awolowo University","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Julius","middleName":"Olaoye","lastName":"Faluyi","suffix":""},{"id":56004320,"identity":"8fb31d26-8a12-4f6f-a501-22af8be10e4f","order_by":1,"name":"Joshua Olumide Matthew","email":"","orcid":"","institution":"National Horticultural Research Institute","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Joshua","middleName":"Olumide","lastName":"Matthew","suffix":""},{"id":56004321,"identity":"fc451ac2-7f17-4b95-8abd-3cd48bb6e1a9","order_by":2,"name":"Sekinat Okiki Azeez","email":"","orcid":"","institution":"Obafemi Awolowo University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Sekinat","middleName":"Okiki","lastName":"Azeez","suffix":""}],"badges":[],"createdAt":"2021-09-12 23:42:05","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-899870/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-899870/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":14416197,"identity":"e1d7d22e-488c-4d1a-88b0-78287f48352e","added_by":"auto","created_at":"2021-10-11 16:11:24","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1160935,"visible":true,"origin":"","legend":"","description":"","filename":"TetfundYamPaper.pdf","url":"https://assets-eu.researchsquare.com/files/rs-899870/v1_covered.pdf"}],"financialInterests":"","formattedTitle":"\u003cp\u003eCollection, Characterizaton and Conservation of Genetic Resources of Yam Cultivars From Ekiti State, Nigeria\u003c/p\u003e","fulltext":[{"header":"Full Text","content":"This preprint is available for \u003ca href='/article/rs-899870/latest.pdf' target='_blank'\u003edownload as a PDF\u003c/a\u003e."}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"genetic-resources-and-crop-evolution","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"gres","sideBox":"Learn more about [Genetic Resources and Crop Evolution](https://www.springer.com/journal/10722)","snPcode":"10722","submissionUrl":"https://submission.nature.com/new-submission/10722/3","title":"Genetic Resources and Crop Evolution","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Dioscorea, cultivars, collection, conservation, pounded yam, starch properties","lastPublishedDoi":"10.21203/rs.3.rs-899870/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-899870/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis study was initiated to restore the genetic resources of yam which had been decimated in a core yam-producing community in Ekiti State, Southwestern Nigeria. Twenty cultivars, consisting of \u003cem\u003eDioscorea rotundata, D. cayenensis, D. alata\u003c/em\u003e, and \u003cem\u003eD. dumetorum\u003c/em\u003e were identified, collected, characterized and multiplied using an On-farm Participatory Method. The yam cultivars were characterized for quality and yield of pounded yam (\u003cem\u003eiyan\u003c/em\u003e) as well as starch properties. They were later conserved in the Teaching and Research Farm of the Obafemi Awolowo University Ile-Ife.\u003c/p\u003e\u003cp\u003eMorphological characterization separated \u003cem\u003eDioscorea alata\u003c/em\u003e (\u003cem\u003eEwura\u003c/em\u003e) by its winged vines while \u003cem\u003eDioscorea dumetorum\u003c/em\u003e (\u003cem\u003eEsuru\u003c/em\u003e) was separated by its pubescent spines, trifoliate leaf with acute apex and base and the clustered, irregularly-shaped tuber.\u003cem\u003e \u003c/em\u003e\u0026nbsp;All the tubers of the yam cultivars had high storability. Pounded yam quality rated the \u003cem\u003eIkumo\u003c/em\u003e and \u003cem\u003eAjimokun \u003c/em\u003ecultivars as best while \u003cem\u003eOdo\u003c/em\u003e was rated average and this was attributed to the swelling properties and amylose content of these cultivars. Yam cultivars with high granules had low swelling capacities. The Brittle Fraction Index of the starch from all the cultivars was lower than 1.0 explaining why the \u003cem\u003eiyan\u003c/em\u003e they produced had no crust on the surface and kept for long hours after preparation.\u003c/p\u003e\u003cp\u003eFrom this study, it was concluded that the local yam cultivars collected represent the core of yam genetic resources for utilization in the region. These cultivars are therefore recommended for prioritization in further studies on propagation, conservation and improvement so that a narrow genetic base of cultivars is not encouraged, for example, by promoting cultivars whose vines perform well in tuberization.\u0026nbsp;\u003c/p\u003e","manuscriptTitle":"Collection, Characterizaton and Conservation of Genetic Resources of Yam Cultivars From Ekiti State, Nigeria","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2021-10-11 16:11:17","doi":"10.21203/rs.3.rs-899870/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"editorInvitedReview","content":"","date":"2021-10-07T08:30:50+00:00","index":0,"fulltext":""},{"type":"editorAssigned","content":"","date":"2021-09-12T00:37:10+00:00","index":"","fulltext":""},{"type":"submitted","content":"Genetic Resources and Crop Evolution","date":"2021-09-11T12:16:53+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"genetic-resources-and-crop-evolution","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"gres","sideBox":"Learn more about [Genetic Resources and Crop Evolution](https://www.springer.com/journal/10722)","snPcode":"10722","submissionUrl":"https://submission.nature.com/new-submission/10722/3","title":"Genetic Resources and Crop Evolution","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"3b932723-56e1-424b-be1e-325a4f42e2f5","owner":[],"postedDate":"October 11th, 2021","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[{"id":7764285,"name":"Botany"}],"tags":[],"updatedAt":"2022-01-21T04:41:41+00:00","versionOfRecord":[],"versionCreatedAt":"2021-10-11 16:11:17","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-899870","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-899870","identity":"rs-899870","version":["v1"]},"buildId":"7rjqhiLT3MXkJMwkYKINL","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}