Show simple item record

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

dc.contributor.authorBadu-Apraku, B.
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.accessioned2019-12-04T11:36:56Z
dc.date.available2019-12-04T11:36:56Z
dc.date.issued2019
dc.identifier.citationBadu-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.
dc.identifier.issn0011-183X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6385
dc.descriptionOpen Access Article; Published online: 25 Sept 2019
dc.description.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.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-51
dc.language.isoen
dc.rightsCC-BY-4.0
dc.subjectMaize
dc.subjectFood Security
dc.subjectDrought Tolerance
dc.subjectStriga
dc.subjectStriga Hermonthica
dc.subjectSubsaharan Africa
dc.subjectGenetics
dc.subjectInbred Lines
dc.titleGenetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAhmadu Bello University
cg.contributor.affiliationObafemi Awolowo University
cg.contributor.affiliationBells University of Technology, Nigeria
cg.contributor.affiliationCrops Research Institute, Ghana
cg.contributor.affiliationSavanna Agricultural Research Institute, Ghana
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.creator.identifierBAFFOUR BADU-APRAKU: 0000-0003-0113-5487
cg.researchthemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectWeeds
cg.journalCrop Science
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid108129
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.2135/cropsci2019.04.0263


Files in this item

Thumbnail
Name:
Genetic studies of extra early ...
Size:
1.649Mb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record