Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments

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cg.authorship.typesCGIAR and developing country institute
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAhmadu Bello University
cg.contributor.affiliationObafemi Awolowo University
cg.contributor.affiliationBells University of Technology
cg.contributor.affiliationCouncil for Scientific and Industrial Research, Ghana
cg.contributor.crpMaize
cg.contributor.donorBill & Melinda Gates Foundation
cg.coverage.countryNigeria
cg.coverage.iso3166-alpha2NG
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.creator.identifierBAFFOUR BADU-APRAKU: 0000-0003-0113-5487
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.2135/cropsci2019.04.0263
cg.identifier.iitathemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.issn0011-183X
cg.journalCrop Science
cg.reviewStatusPeer Review
cg.subject.iitaMAIZE
cg.subject.iitaPLANT BREEDING
cg.subject.iitaPLANT GENETIC RESOURCES
cg.subject.iitaWEEDS
dc.contributor.authorBadu-Apraku, Baffour
dc.contributor.authorFakorede, M.A.B.
dc.contributor.authorTalabi, A.O.
dc.contributor.authorOyekunle, M.
dc.contributor.authorAderounmu, M.
dc.contributor.authorLum, A.F.
dc.contributor.authorRibeiro, P.F.
dc.contributor.authorAdu, G.B.
dc.contributor.authorToyinbo, J.O.
dc.date.accessioned2019-10-10T10:14:24Zen
dc.date.available2019-10-10T10:14:24Zen
dc.identifier.urihttps://hdl.handle.net/10568/104027
dc.titleGenetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environmentsen
dcterms.abstractVitamin A deficiency, drought, low soil nitrogen (low N) and Striga hermonthica parasitism of maize (Zea mays L.) cause malnutrition and food insecurity in sub-Saharan Africa. The objectives of this study were to determine combining abilities of extra-early provitamin A (PVA) lines, classify them into heterotic groups (HGs), identify testers, and determine yield stability of hybrids under contrasting environments in two trials. In trial 1, 20 extra-early PVA lines were inter-mated in a diallel mating scheme to obtain 190 F1 hybrids. The 190 F1 hybrids plus six checks were tested under Striga infestation, drought, and stress-free environments in Nigeria from 2015 to 2017. In trial 2, 35 extra-early yellow hybrids were evaluated under low-N, Striga-infested and stress-free environments in 2018. Provitamin A concentrations of 23.98 and 22.56 μg g-1 were obtained for TZEEIOR 202 and TZEEIOR 205. TZEEIOR 197 × TZEEIOR 205 (20.1 μg g-1) and TZEEIOR 202 × TZEEIOR 205 (22.7 μg g-1) contained about double the PVA level of the commercial check, TZEEI 58 × TZEE-Y Pop STR C5 (11.4 μgg-1). Both general (GCA) and specific (SCA) combining ability variances were statistically significant for most agronomic traits, although GCA was much larger than SCA effects, indicating that additive genetic effects primarily controlled the inheritance of those traits. TZEEIOR 97 and TZEEIOR 197 were identified as inbred testers. TZEEIOR 197 × TZEEIOR205 (20.1 μg g-1) was identified as a single-cross tester as well as the most stable and highest-yielding hybrid across environments. TZEEIOR 202 and TZEEIOR 205 should be invaluable resources for breeding for high PVA. PVA level was independent of hybrid yield potential, indicating that selection of superior hybrids with elevated PVA levels should be feasible.en
dcterms.accessRightsOpen Access
dcterms.audienceScientists
dcterms.available2019-09-25
dcterms.bibliographicCitationBadu-Apraku, B., Fakorede, M.A.B., Talabi, A.O., Oyekunle, M., Aderounmu, M., Lum, A.F. & Toyinbo, J.O. (2019). Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments. Crop Science, 1-51.en
dcterms.extent1-51
dcterms.issued2019
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherWiley
dcterms.subjectmaizeen
dcterms.subjectfood securityen
dcterms.subjectdrought toleranceen
dcterms.subjectstrigaen
dcterms.subjectstriga hermonthicaen
dcterms.subjectsubsaharan africaen
dcterms.subjectgeneticsen
dcterms.subjectinbred linesen
dcterms.typeJournal Article

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