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Assessing the use of a drought‑tolerant variety as adaptation strategy for maize production under climate change in the savannas of Nigeria

dc.contributor.authorTofa, A.I.
dc.contributor.authorKamara, A.Y.
dc.contributor.authorBabaji, B.A.
dc.contributor.authorAkinseye, F.M.
dc.contributor.authorBebeley, J.F.
dc.date.accessioned2022-09-20T09:25:40Z
dc.date.available2022-09-20T09:25:40Z
dc.date.issued2021
dc.identifier.citationTofa, A.I., Kamara, A.Y., Babaji, B.A., Akinseye, F.M. & Bebeley, J.F. (2021). Assessing the use of a drought-tolerant variety as adaptation strategy for maize production under climate change in the savannas of Nigeria. Scientific Reports, 11(1): 8983, 1-16.
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7773
dc.description.abstractThe Decision Support System for Agricultural Technology Transfer (DSSAT) was used to quantify the impact of climate change on maize yield and the potential benefits of the use of drought-tolerant maize variety over non-drought tolerant variety in savanna ecological zones of Nigeria. Projections of maize yields were estimated for three locations representing different agro-climatic zones and soil conditions, in the mid-century (2040–2069) and end-century (2070–2099) under representative concentration pathways scenarios (RCP 4.5 and 8.5) against the baseline period (1980–2009). Relative to the baseline period, the ensemble Global Circulation Models (GCMs) predicted significant increase in minimum and maximum temperatures and seasonal rainfall across the sites. In the mid-century, ensemble GCMs predicted temperatures increase between 1.7–2.4 °C for RCP4.5 and 2.2–2.9 °C for RCP8.5. By end-century, the temperature increases between 2.2–3.0 °C under RCP4.5 and 3.9–5.0 °C under RCP8.5. Predicted seasonal rainfall increase between 1.2–7% for RCP4.5 and 0.03–10.6% for RCP8.5 in the mid-century. By end of century, rainfall is expected to increase between 2–6.7% for RCP4.5 and 3.3–20.1% for RCP8.5. The DSSAT model predictions indicated a negative impact on maize yield in all the selected sites, but the degree of the impact varies with variety and location. In the mid-century, the results showed that the yield of the non–drought tolerant maize variety, SAMMAZ-16 will decline by 13–19% under RCP4.5 and 19–28% under RCP8.5. The projection by end-century indicates a decline in yield by 18–26% under RCP4.5 and 38–47% under RCP8.5. The yield of the drought-tolerant variety is projected to decline by 9–18% for RCP4.5 and 14–25% for RCP8.5 in the mid-century and 13–23% under RCP4.5 and 32–43% under RCP8.5 by the end-century. The higher temperatures by both emission scenarios (RCP 4.5 and 8.5) were primarily shown to cause more yield losses for non-drought-tolerant variety than that of the drought-tolerant variety. There will be 1–6% less reduction in yield when drought-tolerant variety is used. However, the higher yield reductions in the range of − 13 to − 43% predicted for the drought-tolerant variety by the end of the century across the study areas highlighted the need to modify the maize breeding scheme to combine both tolerances to drought and heat stresses in the agro-ecological zones of northern Nigeria.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-16
dc.language.isoen
dc.subjectDrought Tolerance
dc.subjectVarieties
dc.subjectMaize
dc.subjectCrop Production
dc.subjectClimate Change
dc.subjectNigeria
dc.subjectBreeding Programmes
dc.subjectTemperature
dc.subjectRainfall Patterns
dc.subjectEnvironment
dc.titleAssessing the use of a drought‑tolerant variety as adaptation strategy for maize production under climate change in the savannas of Nigeria
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAhmadu Bello University
cg.contributor.affiliationInternational Crop Research Institute for the Semi-Arid Tropics
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidTOFA:2021
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectClimate Change
cg.iitasubjectFood Security
cg.iitasubjectMaize
cg.iitasubjectMeteorology and Climatology
cg.iitasubjectNatural Resource Management
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalScientific Reports
cg.notesPublished online: 26 Apr 2021
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1038/s41598-021-88277-6
cg.iitaauthor.identifierAlpha Kamara: 0000-0002-1844-2574
cg.futureupdate.requiredNo
cg.identifier.issue1
cg.identifier.volume11
cg.contributor.acknowledgementsThis work was funded by Bill and Melinda Gates Foundation (BMGF) through International Institute of Tropical Agriculture (IITA) under the Project Taking Maize Agronomy to Scale in Africa (TAMASA) with Grant no. OPP1113374. We would also like to thank the Nigerian Meteorological Agency (NIMET) for providing climate data and the staff of Agronomy unit of IITA, Kano office for their support in collecting the experimental data for this research study.


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