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

Simple item page
cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationCouncil for Scientific and Industrial Research - Savanna Agricultural Research Instituteen
cg.contributor.affiliationUniversity of the Free Stateen
cg.contributor.affiliationUniversity for Development Studies, Ghanaen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.donorBill & Melinda Gates Foundationen
cg.contributor.initiativeAccelerated Breeding
cg.coverage.countryGhana
cg.coverage.iso3166-alpha2GH
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.creator.identifierKwabena Darkwa: 0000-0002-6877-8527en
cg.creator.identifierEmmanuel AMPONSAH ADJEI: 0000-0002-3138-6060en
cg.creator.identifierAlhassan Sayibu: 0000-0002-6266-6452en
cg.creator.identifierI.K. Amegbor: 0000-0002-6134-5534en
cg.creator.identifierZiblila Sayibu: 0009-0003-9237-3874en
cg.creator.identifierMuazu Issifu: 0000-0002-3159-1857en
cg.creator.identifierPaterne AGRE: 0000-0003-1231-2530en
cg.creator.identifierPatrick Adebola: 0000-0002-5155-6194en
cg.creator.identifierAsrat Asfaw: 0000-0002-4859-0631en
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.1007/s10681-025-03467-xen
cg.identifier.iitathemeBIOTECH & PLANT BREEDINGen
cg.isijournalISI Journalen
cg.issn0014-2336en
cg.issue23en
cg.journalEuphyticaen
cg.reviewStatusPeer Reviewen
cg.subject.actionAreaGenetic Innovation
cg.subject.iitaAGRONOMYen
cg.subject.iitaFOOD SECURITYen
cg.subject.iitaPLANT BREEDINGen
cg.subject.iitaPLANT PRODUCTIONen
cg.subject.iitaYAMen
cg.subject.impactAreaNutrition, health and food security
cg.subject.impactPlatformNutrition, Health and Food Security
cg.subject.sdgSDG 2 - Zero hungeren
cg.volume221en
dc.contributor.authorDarkwa, K.en
dc.contributor.authorAdjei, E.A.en
dc.contributor.authorChamba, E.B.en
dc.contributor.authorSayibu, A.en
dc.contributor.authorAmegbor, I.K.en
dc.contributor.authorAgyapong, F.A.en
dc.contributor.authorSayibu, Z.en
dc.contributor.authorSayibu, I.en
dc.contributor.authorKangmennaang, M.en
dc.contributor.authorIssifu, M.en
dc.contributor.authorAgre, P.A.en
dc.contributor.authorAdebola, P.en
dc.contributor.authorAsfaw, A.en
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.audienceScientistsen
dcterms.available2025-02-06en
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.descriptionOpen Access Articleen
dcterms.extent1-16en
dcterms.issued2025en
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.subjectgenetic gainen
dcterms.subjectheritabilityen
dcterms.subjectselection indexen
dcterms.subjectwhite guinea yamen
dcterms.subjectgenetic correlationen
dcterms.subjectbreedingen
dcterms.typeJournal Article

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
Darkwa_et_al2025.pdf
Size:
1.01 MB
Format:
Adobe Portable Document Format
Download

License bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

IITA Journal Articles
CGIAR Initiative on Accelerated Breeding