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Effects of drought stress on grain yield, agronomic performance, and heterosis of marker-based improved provitamin-A maize synthetics and their hybrids

dc.contributor.authorIseghohi, I.
dc.contributor.authorAbe, A.
dc.contributor.authorMeseka, S.K.
dc.contributor.authorMengesha Abera, W.
dc.contributor.authorGedil, M.
dc.contributor.authorMenkir, A.
dc.date.accessioned2022-09-20T11:57:59Z
dc.date.available2022-09-20T11:57:59Z
dc.date.issued2021-05-01
dc.identifier.citationIseghohi, I., Abe, A., Meseka, S., Mengesha, W., Gedil, M. & Menkir, A. (2021). Effects of drought stress on grain yield, agronomic performance, and heterosis of marker-based improved provitamin-A maize synthetics and their hybrids. Journal of Crop Improvement, 36(2), 239-259.
dc.identifier.issn1542-7528
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7775
dc.description.abstractProvitamin A-enriched maize (Zea mays L.) is an important complementary food staple for combating vitamin A deficiency (VAD) in high maize-producing and maize-consuming countries of sub-Saharan Africa (SSA). However, frequent drought is a major abiotic factor that retards maize growth, resulting in yearly fluctuations in grain yield. Development of provitamin A-enriched maize varieties resilient to recurrent drought stress could enhance and stabilize maize grain yield. This study was conducted to assess the effects of managed drought stress (MDS) on the performance and heterosis of some marker-based improved provitamin A maize synthetics and their varietal-cross hybrids. The maize synthetics and their varietal-cross hybrids, along with a drought-tolerant check (PVASYN13), were evaluated under MDS and well-watered (WW) conditions at Ikenne, Nigeria, for two years. Genotype and year effects were significant for grain yield and some agronomic traits under MDS and WW conditions. Grain yield was reduced by 56% under MDS. Grain yield was significantly correlated with days to anthesis, days to silking and anthesis-silking-interval under MDS but not under WW condition. Under MDS, three varietal-cross hybrids (PVASYNHGBC0/PVASYNHGAC0, PVASYNHGBC2/PVASYNHGAC0, PVASYNHGBC0/ PVASYNHGAC1) had similar grain yields and tolerance indices as the drought-tolerant check, whereas PVASYNHGBC1/PVASYNHGAC2 produced 12.5% more grain yield than the check. Three of the varietal-cross hybrids (PVASYNHGBC0/PVASYNHGAC0, PVASYNHGBC0/PVASYNHGAC1 and PVASYNHGBC1/PVASYNHGAC2) had significant mid-parent heterosis for grain yield under the two test conditions, and were recommended for developing drought-tolerant varieties to combat VAD in drought-prone environments of SSA.
dc.description.sponsorshipTertiary Education Trust Fund (TETFUND)
dc.description.sponsorshipFederal University Oye Ekiti
dc.description.sponsorshipHarvestPlus
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent239-259
dc.language.isoen
dc.subjectGrain
dc.subjectYields
dc.subjectManagement
dc.subjectDrought Stress
dc.subjectHybrids
dc.subjectMaize
dc.subjectAbiotic Factors
dc.subjectRetinol
dc.subjectAgronomic Characters
dc.titleEffects of drought stress on grain yield, agronomic performance, and heterosis of marker-based improved provitamin-A maize synthetics and their hybrids
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ibadan
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidISEGHOHI:2021
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAflatoxin
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectFood Systems
cg.iitasubjectGrain Legumes
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.iitasubjectSoil Fertility
cg.iitasubjectSoil Health
cg.journalJournal of Crop Improvement
cg.notesPublished online: 02 Aug 2021
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1080/15427528.2021.1949772
cg.iitaauthor.identifierInnocent Iseghohi: 0000-0003-1310-1700
cg.iitaauthor.identifierMeseka Silvestro: 0000-0003-1004-2450
cg.iitaauthor.identifierWende Mengesha: 0000-0002-2239-7323
cg.iitaauthor.identifierMelaku Gedil: 0000-0002-6258-6014
cg.iitaauthor.identifierAbebe Menkir: 0000-0002-5907-9177
cg.futureupdate.requiredNo
cg.identifier.issue2
cg.identifier.volume36
cg.contributor.acknowledgementsThe authors wish to thank the staff of Maize Improvement Program (MIP) and Food and Nutrition Laboratory of the International Institute of Tropical Agriculture (IITA) for their technical supports.


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