Genetic parameter estimates and selection gain for multiple traits in white Guinea yam (Dioscorea rotundata) in Ghana

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cg.authorship.typesCGIAR and developing country institute
cg.contributor.affiliationCouncil for Scientific and Industrial Research - Savanna Agricultural Research Institute
cg.contributor.affiliationUniversity of the Free State
cg.contributor.affiliationUniversity for Development Studies, Ghana
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.donorBill & Melinda Gates Foundation
cg.contributor.initiativeAccelerated Breeding
cg.coverage.countryGhana
cg.coverage.iso3166-alpha2GH
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.creator.identifierKwabena Darkwa: 0000-0002-6877-8527
cg.creator.identifierEmmanuel AMPONSAH ADJEI: 0000-0002-3138-6060
cg.creator.identifierAlhassan Sayibu: 0000-0002-6266-6452
cg.creator.identifierI.K. Amegbor: 0000-0002-6134-5534
cg.creator.identifierZiblila Sayibu: 0009-0003-9237-3874
cg.creator.identifierMuazu Issifu: 0000-0002-3159-1857
cg.creator.identifierPaterne AGRE: 0000-0003-1231-2530
cg.creator.identifierPatrick Adebola: 0000-0002-5155-6194
cg.creator.identifierAsrat Asfaw: 0000-0002-4859-0631
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.1007/s10681-025-03467-x
cg.identifier.iitathemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.issn0014-2336
cg.issue3
cg.journalEuphytica
cg.number23
cg.reviewStatusPeer Review
cg.subject.actionAreaGenetic Innovation
cg.subject.iitaAGRONOMY
cg.subject.iitaFOOD SECURITY
cg.subject.iitaPLANT BREEDING
cg.subject.iitaPLANT PRODUCTION
cg.subject.iitaYAM
cg.subject.impactAreaNutrition, health and food security
cg.subject.impactPlatformNutrition, Health and Food Security
cg.subject.sdgSDG 2 - Zero hunger
cg.volume221
dc.contributor.authorDarkwa, K.
dc.contributor.authorAdjei, E.A.
dc.contributor.authorChamba, E.B.
dc.contributor.authorSayibu, A.
dc.contributor.authorAmegbor, I.K.
dc.contributor.authorAgyapong, F.A.
dc.contributor.authorSayibu, Z.
dc.contributor.authorSayibu, I.
dc.contributor.authorKangmennaang, M.
dc.contributor.authorIssifu, M.
dc.contributor.authorAgre, P.A.
dc.contributor.authorAdebola, P.
dc.contributor.authorAsfaw, A.
dc.date.accessioned2025-03-10T11:03:10Zen
dc.date.available2025-03-10T11:03:10Zen
dc.identifier.urihttps://hdl.handle.net/10568/173535
dc.titleGenetic parameter estimates and selection gain for multiple traits in white Guinea yam (Dioscorea rotundata) in Ghanaen
dcterms.abstractQuantifying selection gains enables a more targeted assessment of breeding program effectiveness, highlighting opportunities for strategic improvement and optimized genetic advancement in white Guinea Yam. This study assessed genetic parameters and gain for key traits in a white Guinea yam (D. rotundata) breeding population. A total of 81 genotypes were evaluated for two seasons using a 9 × 9 lattice design with three replicates. Data was collected on yam mosaic virus disease severity, tuber yield and tuber dry content for genetic analysis. Broad sense heritability was generally high (> 60) for most of the traits. At the same time, the corresponding genetic advance as a percentage of the mean was exceptionally high (30.28–93.96%) for tuber yield, tuber flesh oxidation, average tuber weight and number of tubers per plant, suggesting additive genetic effects. A multi-trait selection index of the 5% highest performing genotypes revealed positive genetic gain for plant vigour, tuber length, and width, tuber weight per plant, average tuber weight and fresh tuber yield. The genetic gain was, however, negative for tuber dry matter content compared to the check varieties, necessitating a modification of the current breeding scheme such that post-harvest food quality is not sacrificed for tuber yield. Ranking of the breeding lines based on the multi-trait selection index identified four lines (TDr1700004_014, TDr1700004_113, TDr1700001_112 and TDr1700002_090) with high genetic merits for all the economic traits. These lines can be used as potential trait progenitors and evaluated further for possible release as new varieties. Our results decipher the genetic control and provide an overview of the performance of the breeding program for key traits in white Guinea yam.en
dcterms.accessRightsOpen Access
dcterms.audienceScientists
dcterms.available2025-02-06
dcterms.bibliographicCitationDarkwa, K., Adjei, E.A., Chamba, E.B., Sayibu, A. Amegbor, I.K., Agyapong, F.A., ... & Asfaw, A. (2025). Genetic parameter estimates and selection gain for multiple traits in white Guinea yam (Dioscorea rotundata) in Ghana. Euphytica, 221: 23, 1-16.en
dcterms.extent1-16
dcterms.issued2025-03
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherSpringer
dcterms.subjectgenetic gainen
dcterms.subjectheritabilityen
dcterms.subjectselection indexen
dcterms.subjectwhite guinea yamen
dcterms.subjectgenetic correlationen
dcterms.subjectbreedingen
dcterms.typeJournal Article

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