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Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments

dc.contributor.authorObeng-Bio, E.
dc.contributor.authorBadu-Apraku, B.
dc.contributor.authorIfie, B.E.
dc.contributor.authorDanquah, A.
dc.contributor.authorBlay, E.T.
dc.contributor.authorAnnor, B.
dc.date.accessioned2019-12-04T11:39:07Z
dc.date.available2019-12-04T11:39:07Z
dc.date.issued2019
dc.identifier.citationObeng-Bio, E., Badu-Apraku, B., Ifie, B.E., Danquah, A., Blay, E.T. & Annor, B. (2019). Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments. The Journal of Agricultural Science, 1-21.
dc.identifier.issn0021-8596
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6540
dc.descriptionOpen Access Article; Published online: 17 Oct 2019
dc.description.abstractEarly-maturing provitamin A (PVA) quality protein maize (QPM) hybrids with combined drought and low soil nitrogen (low-N) tolerance are needed to address malnutrition and food security problems in sub-Saharan Africa (SSA). The current study's objectives were to (i) examine combining ability of selected early maturing PVA-QPM inbreds for grain yield and other agronomic traits under drought, low-N, optimal environments and across environments, (ii) determine gene action conditioning PVA accumulation under optimal environments, (iii) classify inbreds into heterotic groups and identify testers and (iv) assess yield and stability of hybrids across environments. Ninety-six hybrids generated from 24 inbred lines using the North Carolina Design II together with four commercial hybrid controls were evaluated under drought, low-N and optimal environments in Nigeria in 2016 and 2017. Fifty-four selected hybrids were assayed for PVA carotenoid and tryptophan content. Additive genetic effects were greater than non-additive effects for grain yield and most agronomic traits under each and across environments. The gene action conditioning accumulation of PVA carotenoids under optimal growing conditions followed a pattern similar to that of grain yield and other yield-related traits. The inbred lines were categorized into four heterotic groups consistent with the pedigree records and with TZEIORQ 29 identified as the best male and female tester for heterotic group IV. No tester was found for the other groups. Hybrid TZEIORQ 24 × TZEIORQ 41 was the highest yielding and most stable across environments and should be further tested for consistent performance for commercialization in SSA.
dc.description.sponsorshipUnited States Agency for International Development
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-21
dc.language.isoen
dc.rightsCC-BY-4.0
dc.subjectDrought Tolerance
dc.subjectMaize
dc.subjectYields
dc.subjectQuality
dc.subjectAgronomy
dc.subjectProduction
dc.titleGenetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpMaize
cg.contributor.affiliationUniversity of Ghana
cg.contributor.affiliationCouncil for Scientific and Industrial Research, Ghana
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.creator.identifierEBENEZER OBENG-BIO: 0000-0002-7796-0419
cg.creator.identifierBAFFOUR BADU-APRAKU: 0000-0003-0113-5487
cg.researchthemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalThe Journal of Agricultural Science
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid109913
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1017/%20s0021859619000753


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