Population structure and genetic diversity of cowpea germplasm from Senegal in light of a global panel

Population structure and genetic diversity of cowpea germplasm from Senegal in light of a global panel | 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 Article Population structure and genetic diversity of cowpea germplasm from Senegal in light of a global panel Amy Bodian, Awa Sarr, Sassoum Lô, Omar Diack, Demba Dramé, Daniel Fonceka, and 6 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7999275/v1 This work is licensed under a CC BY 4.0 License Status: Under Revision Version 1 posted 13 You are reading this latest preprint version Abstract Characterizing the genetic diversity of crop germplasm is essential for its effective use in breeding programs. In this study, we genotyped 95 cowpea ( Vigna unguiculata ) accessions from Senegal, including cultivated, intermediate, and wild types, using the Illumina Cowpea iSelect Consortium Array (51,128 SNPs). We first compared the genetic diversity of the Senegalese collection to that of the UCR minicore collection, which represents the global cultivated cowpea diversity, and then conducted a detailed analysis of the Senegalese accessions. Principal component analysis and population structure revealed the six clusters previously identified in the UCR minicore, as well as two to three additional groups unique to the Senegalese collection. The genetic diversity of Senegalese cultivated accessions ranked among the highest of all minicore subpopulations. These findings indicate that Senegalese cowpea germplasm represents a valuable and original genetic resource that can contribute to broadening global cowpea diversity. Within the Senegalese collection, population structure did not consistently reflect geographic origin, with the exception of the accessions from Saint Louis. Wild accessions formed a distinct and homogeneous cluster. Overall, the observed diversity highlights promising opportunities for identifying beneficial alleles that can be leveraged in cowpea breeding programs. Biological sciences/Biotechnology Biological sciences/Genetics Biological sciences/Plant sciences cowpea (Vigna unguiculata) germplasm Senegal SNP markers genetic diversity Full Text Additional Declarations No competing interests reported. Supplementary Files Supplementaryinformations.pdf Cite Share Download PDF Status: Under Revision Version 1 posted Editorial decision: Revision requested 21 Apr, 2026 Reviews received at journal 10 Apr, 2026 Reviewers agreed at journal 05 Apr, 2026 Reviewers agreed at journal 01 Apr, 2026 Reviews received at journal 10 Feb, 2026 Reviewers agreed at journal 21 Jan, 2026 Reviews received at journal 11 Jan, 2026 Reviewers agreed at journal 23 Nov, 2025 Reviewers invited by journal 17 Nov, 2025 Editor assigned by journal 17 Nov, 2025 Editor invited by journal 14 Nov, 2025 Submission checks completed at journal 12 Nov, 2025 First submitted to journal 12 Nov, 2025 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. 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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-7999275","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":549330515,"identity":"594d7dc1-8db2-4265-a108-731fdbae3515","order_by":0,"name":"Amy 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