Show simple item record

Estimating genetic gains for tolerance to stress combinations in tropical maize hybrids

dc.contributor.authorMenkir, A.
dc.contributor.authorDieng, I.
dc.contributor.authorMeseka, S.
dc.contributor.authorBossey, B.
dc.contributor.authorMengesha, W.
dc.contributor.authorMuhyideen, O.
dc.contributor.authorRiberio, P.F.
dc.contributor.authorCoulibaly, M.
dc.contributor.authorYacoubou, A.M.
dc.contributor.authorBankole, F.A.
dc.contributor.authorAdu, G.B.
dc.contributor.authorOjo, T.
dc.date.accessioned2023-01-18T11:54:05Z
dc.date.available2023-01-18T11:54:05Z
dc.date.issued2022-12-08
dc.identifier.citationMenkir, A., Dieng, I., Meseka, S., Bossey, B., Mengesha, W., Muhyideen, O., ... & Ojo, T. (2022). Estimating genetic gains for tolerance to stress combinations in tropical maize hybrids. Frontiers in Genetics, 13: 1023318, 1-13.
dc.identifier.issn1664-8021
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8011
dc.description.abstractMaize is a strategic food crop in sub-Saharan Africa. However, most maize growing tropical savannas particularly in West and Central African experience the occurrence of frequent droughts and Striga infestation, resulting in 30–100% yield losses. This production zones need maize cultivars that combine tolerance to the two stresses. IITA in collaboration with national partners has thus employed a sequential selection scheme to incorporate both drought tolerance and Striga resistance in topical maize hybrids using reliable screening protocols. The main objective of the present study was therefore to use grain yield and other agronomic traits recorded in regional collaborative hybrid trials conducted for 8 years under manged stressful and non-stressful conditions and across rainfed field environments to estimate genetic gains in grain yields using mixed model analyses. The results showed significant (p < 0.05) annual yield gains of 11.89 kg ha−1 under manged drought stress (MDS) and 86.60 kg ha−1 under Striga infestation (STRIN) with concomitant yield increases of 62.65 kg ha−1 under full irrigation (WW), 102.44 kg ha−1 under Striga non-infested (STRNO) conditions and 53.11 kg ha−1 across rainfed field environments. Grain yield displayed significant but not strong genetic correlation of 0.41 ± 0.07 between MDS and STRIN, indicating that gene expression was not consistent across the two stress conditions. Furthermore, grain yield recorded in MET had significant moderate genetic correlations of 0.58 ± 0.06 and 0.44 ± 0.07It with MDS and STRIN, respectively. These results emphasize the need to screen inbred linens under both stress conditions to further enhance the rate of genetic gain in grain yield in hybrids for areas where the two stresses co-occur. Nonetheless, this study demonstrated that the sequential selection scheme has been successful in generating hybrids with dependable yields that can reduce chronic food deficits in rural communities experiencing simultaneous presence of drought and S. hermonthica infestation in their production fields.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-13
dc.language.isoen
dc.subjectGenetic Gain
dc.subjectTolerance
dc.subjectStress
dc.subjectMaize
dc.subjectDrought Stress
dc.subjectHybrids
dc.titleEstimating genetic gains for tolerance to stress combinations in tropical maize hybrids
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAhmadu Bello University
cg.contributor.affiliationCrops Research Institute, Ghana
cg.contributor.affiliationInstitute de Economic Rurale, Mali
cg.contributor.affiliationNational Institute of Agricultural Research of Benin/CRA
cg.contributor.affiliationUniversity of Ilorin
cg.contributor.affiliationSavanna Agricultural Research Institute
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalFrontiers in Genetics
cg.notesOpen Access Journal; Published online: 08 Dec 2022
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.3389/fgene.2022.1023318
cg.iitaauthor.identifierAbebe Menkir: 0000-0002-5907-9177
cg.iitaauthor.identifierIbnou Dieng: 0000-0002-1051-9143
cg.iitaauthor.identifierSILVESTRO MESEKA: 0000-0003-1004-2450
cg.iitaauthor.identifierWende Mengesha: 0000-0002-2239-7323
cg.futureupdate.requiredNo
cg.identifier.issue1023318
cg.identifier.volume13


Files in this item

Thumbnail
Name:
Estimating genetic gains for....pdf
Size:
1.358Mb
Format:
PDF
Description:
Journal Article
View/Open

This item appears in the following Collection(s)

Show simple item record