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Assessment of genetic diversity for drought, heat and combined drought and heat stress tolerance in early maturing maize landraces

dc.contributor.authorNelimor, C.
dc.contributor.authorBadu-Apraku, B.
dc.contributor.authorTetteh, A.Y.
dc.contributor.authorN’guetta, A.S.
dc.date.accessioned2020-07-06T10:03:53Z
dc.date.available2020-07-06T10:03:53Z
dc.date.issued2019
dc.identifier.citationNelimor, C., Badu-Apraku, B., Tetteh, A.Y. & N’guetta, A.S. (2019). Assessment of genetic diversity for drought, heat and combined drought and heat stress tolerance in early maturing maize landraces. Plants, 8(11), 1-19.
dc.identifier.issn2223-7747
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6888
dc.description.abstractClimate change is expected to aggravate the effects of drought, heat and combined drought and heat stresses. An important step in developing ‘climate smart’ maize varieties is to identify germplasm with good levels of tolerance to the abiotic stresses. The primary objective of this study was to identify landraces with combined high yield potential and desirable secondary traits under drought, heat and combined drought and heat stresses. Thirty-three landraces from Burkina Faso (6), Ghana (6) and Togo (21), and three drought-tolerant populations/varieties from the Maize Improvement Program at the International Institute of Tropical Agriculture were evaluated under three conditions, namely managed drought stress, heat stress and combined drought and heat stress, with optimal growing conditions as control, for two years. The phenotypic and genetic correlations between grain yield of the different treatments were very weak, suggesting the presence of independent genetic control of yield to these stresses. However, grain yield under heat and combined drought and heat stresses were highly and positively correlated, indicating that heat-tolerant genotypes would most likely tolerate combined drought and stress. Yield reduction averaged 46% under managed drought stress, 55% under heat stress, and 66% under combined drought and heat stress, which reflected hypo-additive effect of drought and heat stress on grain yield of the maize accessions. Accession GH-3505 was highly tolerant to drought, while GH-4859 and TZm-1353 were tolerant to the three stresses. These landrace accessions can be invaluable sources of genes/alleles for breeding for adaptation of maize to climate change.
dc.description.sponsorshipGerman Federal Ministry for Education and Research
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-19
dc.language.isoen
dc.subjectClimate Change
dc.subjectDrought Stress
dc.subjectStress
dc.subjectDrought
dc.subjectMaize
dc.subjectAbiotic Stress
dc.subjectGermplasm
dc.subjectGenetic Variation
dc.titleAssessment of genetic diversity for drought, heat and combined drought and heat stress tolerance in early maturing maize landraces
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.affiliationUniversité Felix Houphouët Boigny
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationKwame Nkrumah University of Science and Technology
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryBurkina Faso (Upper Volta)
cg.coverage.countryGhana
cg.coverage.countryTogo
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidNELIMOR:2019a
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectClimate Change
cg.iitasubjectGenetic Improvement
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectPlant Production
cg.journalPlants
cg.notesPublished online: 17 Nov 2019
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.3390/plants8110518
cg.iitaauthor.identifierBAFFOUR BADU-APRAKU: 0000-0003-0113-5487


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