Characterization and Metabolite Profiling of Bioactive Compounds of Pink and White Aggregatum Onion Genotypes

Characterization and Metabolite Profiling of Bioactive Compounds of Pink and White Aggregatum Onion Genotypes | 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 Research Article Characterization and Metabolite Profiling of Bioactive Compounds of Pink and White Aggregatum Onion Genotypes Ashokkumar G, Binisundar S.T, Jignyasa Dash, Indu Rani C, Vasanth S, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6086338/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Aggregatum onion ( Allium cepa L. var. aggregatum Don.) is a noticeable commercial crop widely grown and consumed in southern India. This study focuses on the phytochemical composition of two high yielding onion genotypes through initial phytochemical screening and gas chromatography-mass spectrometry (GC-MS) analysis. The experiment was conducted at Tamil Nadu Agricultural University, Coimbatore from 2022 to 2024, and it included ten aggregatum onion genotypes. The findings reveal that between various genotypes of pink and white aggregatum onion, CO (On) 5 of the pink genotype and ACA 2 of the white genotype outer performed compared to other genotypes in several parameters. The bulb weight, equatorial diameter, plant height, polar diameter, no of leaves, leaf length(cm), leaf girth, foliage weight, bulb length (cm), bulb width (cm) and bulb circumference of CO (On) 5 and ACA 2’s showed a significant and positive correlation with yield. A wide range of metabolites, including aldehydes, alcohol, ketone boron compounds and amines with variations observed among the onion genotypes. The CO (On) 5 has the highest area percentage of 95.81 with higher concentrations of ketone 15.70%, aldehyde 13.10%, lactone 7.89%, alcohol and diol both 7.8% and amine 5.2%. ACA 2 shows the second highest area of 91.26% with higher concentrations of amine (5.26%), lactone (7.89%), alcohol and diol (7.8%), ketone (15.70%), and aldehyde (13.10%). These findings enhance selective breeding efforts aimed at important new information about the phytochemical and nutritional content of onions. They also highlight the potential of these onions for use as high-quality functional foods. Onion Phytochemicals Gas chromatography-mass spectrometry Secondary metabolites Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted 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. 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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-6086338","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":436495903,"identity":"3da0f219-3b4c-4ac5-8afe-7573550852e8","order_by":0,"name":"Ashokkumar G","email":"","orcid":"","institution":"Tamil Nadu Agricultural University","correspondingAuthor":false,"prefix":"","firstName":"Ashokkumar","middleName":"","lastName":"G","suffix":""},{"id":436495904,"identity":"3c9be795-0abc-419a-8ba5-0518387614da","order_by":1,"name":"Binisundar 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metabolites","lastPublishedDoi":"10.21203/rs.3.rs-6086338/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6086338/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eAggregatum onion (\u003cem\u003eAllium cepa\u003c/em\u003e L. var. \u003cem\u003eaggregatum\u003c/em\u003e Don.) is a noticeable commercial crop widely grown and consumed in southern India. This study focuses on the phytochemical composition of two high yielding onion genotypes through initial phytochemical screening and gas chromatography-mass spectrometry (GC-MS) analysis. The experiment was conducted at Tamil Nadu Agricultural University, Coimbatore from 2022 to 2024, and it included ten aggregatum onion genotypes. The findings reveal that between various genotypes of pink and white aggregatum onion, CO (On) 5 of the pink genotype and ACA 2 of the white genotype outer performed compared to other genotypes in several parameters. The bulb weight, equatorial diameter, plant height, polar diameter, no of leaves, leaf length(cm), leaf girth, foliage weight, bulb length (cm), bulb width (cm) and bulb circumference of CO (On) 5 and ACA 2\u0026rsquo;s showed a significant and positive correlation with yield. A wide range of metabolites, including aldehydes, alcohol, ketone boron compounds and amines with variations observed among the onion genotypes. The CO (On) 5 has the highest area percentage of 95.81 with higher concentrations of ketone 15.70%, aldehyde 13.10%, lactone 7.89%, alcohol and diol both 7.8% and amine 5.2%. ACA 2 shows the second highest area of 91.26% with higher concentrations of amine (5.26%), lactone (7.89%), alcohol and diol (7.8%), ketone (15.70%), and aldehyde (13.10%). These findings enhance selective breeding efforts aimed at important new information about the phytochemical and nutritional content of onions. 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