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Approaches and progress in breeding drought-tolerant maize hybrids for tropical lowlands in west and central Africa

dc.contributor.authorMenkir, A.
dc.contributor.authorDieng, I.
dc.contributor.authorGedil, M.
dc.contributor.authorMengesha Abera, W.
dc.contributor.authorOyekunle, M.
dc.contributor.authorRiberio, P.F.
dc.contributor.authorAdu, G.B.
dc.contributor.authorYacoubou, A.M.
dc.contributor.authorCoulibaly, M.
dc.contributor.authorBankole, F.A.
dc.contributor.authorDerera, J.
dc.contributor.authorBossey, B.
dc.contributor.authorUnachukwu, N.
dc.contributor.authorIlesanmi, Y.
dc.contributor.authorMeseka, S.K.
dc.date.accessioned2024-04-19T12:33:52Z
dc.date.available2024-04-19T12:33:52Z
dc.date.issued2024
dc.identifier.citationMenkir, A., Dieng, I., Gedil, M., Mengesha, W., Oyekunle, M., Riberio, P.F., ... & Meseka, S. (2024). Approaches and progress in breeding drought‐tolerant maize hybrids for tropical lowlands in west and central Africa. Plant Genome, e20437, 1-13.
dc.identifier.issn1940-3372
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8466
dc.description.abstractDrought represents a significant production challenge to maize farmers in West and Central Africa, causing substantial economic losses. Breeders at the International Institute of Tropical Agriculture have therefore been developing drought-tolerant maize varieties to attain high grain yields in rainfed maize production zones. The present review provides a historical overview of the approaches used and progress made in developing drought-tolerant hybrids over the years. Breeders made a shift from a wide area testing approach, to the use of managed screening sites, to precisely control the intensity, and timing of drought stress for developing drought-tolerant maize varieties. These sites coupled with the use of molecular markers allowed choosing suitable donors with drought-adaptive alleles for integration into existing elite maize lines to generate new drought-tolerant inbred lines. These elite maize inbred lines have then been used to develop hybrids with enhanced tolerance to drought. Genetic gains estimates were made using performance data of drought-tolerant maize hybrids evaluated in regional trials for 11 years under managed drought stress, well-watered conditions, and across diverse rainfed environments. The results found significant linear annual yield gains of 32.72 kg ha−1 under managed drought stress, 38.29 kg ha−1 under well-watered conditions, and 66.57 kg ha−1 across multiple rainfed field environments. Promising hybrids that deliver high grain yields were also identified for areas affected by drought and variable rainfed growing conditions. The significant genetic correlations found among the three growing conditions highlight the potential to exploit the available genetic resources and modern tools to further enhance tolerance to drought in hybrids.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.description.sponsorshipInternational Fund for Agriculture Development
dc.description.sponsorshipUnited Nations Development Programme
dc.format.extent1-13
dc.language.isoen
dc.subjectMaize
dc.subjectDrought Tolerance
dc.subjectHybrids
dc.subjectBreeding
dc.subjectInbred Lines
dc.titleApproaches and progress in breeding drought-tolerant maize hybrids for tropical lowlands in west and central Africa
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAhmadu Bello University
cg.contributor.affiliationCrop Research Institute, Ghana
cg.contributor.affiliationSavanna Agricultural Research Institute, Ghana
cg.contributor.affiliationNational Institute of Agricultural Research of Benin
cg.contributor.affiliationInstitute de Economie Rurale du Mali
cg.contributor.affiliationUniversity of Ilorin
cg.coverage.regionAfrica
cg.coverage.regionWest and Central 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.journalPlant Genome
cg.notesOpen Access Journal
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1002/tpg2.20437
cg.iitaauthor.identifierAbebe Menkir: 0000-0002-5907-9177
cg.iitaauthor.identifierIbnou Dieng: 0000-0002-1051-9143
cg.iitaauthor.identifierMelaku Gedil: 0000-0002-6258-6014
cg.iitaauthor.identifierWende Mengesha: 0000-0002-2239-7323
cg.iitaauthor.identifierJohn Derera: 0000-0003-3715-0689
cg.iitaauthor.identifierNnanna Unachukwu: 0000-0003-2701-2477
cg.iitaauthor.identifierSILVESTRO MESEKA: 0000-0003-1004-2450
cg.futureupdate.requiredNo
cg.identifier.issuee20437


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