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Comparative performance of early maturing maize cultivars developed in three Eras under drought stress and wellwatered environments in West Africa

dc.contributor.authorBadu-Apraku, B.
dc.contributor.authorOyekunle, M.
dc.contributor.authorMenkir, A.
dc.contributor.authorObeng-Antwi, K.
dc.contributor.authorYallou, C.
dc.contributor.authorUsman, I.
dc.contributor.authorAlidu, H.
dc.date.accessioned2019-12-04T11:03:30Z
dc.date.available2019-12-04T11:03:30Z
dc.date.issued2013-02
dc.identifier.citationBadu-Apraku, B., Oyekunle, M., Menkir, A., Obeng-Antwi, K., Yallou, C. G., Usman, I. S. & Alidu, H. (2013). Comparative performance of early-maturing maize cultivars developed in three eras under drought stress and well-watered environments in West Africa. Crop Science, 53(4), 1298-1311.
dc.identifier.issn0011-183X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1103
dc.descriptionPosted online 15 Feb. 2013
dc.description.abstractMaize (Zea mays L.) is a major staple crop in West Africa and has the potential to mitigate the food insecurity in the subregion. However, maize grain yield is severely constrained by drought. A study was conducted at 13 locations in West Africa for 2 yr to determine genetic gains in yield of cultivars developed during three eras, 1988 to 2000 (first-generation cultivars), 2001 to 2006 (second-generation cultivars), and 2007 to 2010 (third-generation cultivars) under drought and optimal conditions. Under drought, yield ranged from 1346 kg ha?1 for first-generation cultivars to 1613 kg ha?1 for third-generation cultivars with a genetic gain of 1.1% yr?1. Under optimal conditions, yield gain ranged from 3363 kg ha?1 for first-generation cultivars to 3956 kg ha?1 for third-generation cultivars with genetic gain of 1.3%. The average rate of increase in yield was 14 and 40 kg ha?1 yr?1 under drought and optimum conditions. Genetic gains in yield from first- to third-generation cultivars under drought was associated with improved plant aspect and husk cover, whereas under optimum conditions it was associated with plant and ear aspects, increased ears per plant, plant and ear heights, and improved husk cover. Cultivars TZE-W DT C2 STR, DTE-W STR Syn C1, DT-W STR Synthetic, 2009 DTE-W STR Syn, and EV DT-W 2008 STR were high yielding and stable across drought environments. Substantial progress has been made in breeding for drought tolerance during the last three decades.
dc.language.isoen
dc.subjectMaize
dc.subjectDrought
dc.subjectDrought Tolerance
dc.titleComparative performance of early maturing maize cultivars developed in three Eras under drought stress and wellwatered environments in West Africa
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationCouncil for Scientific and Industrial Research, Ghana
cg.contributor.affiliationInstitut National des Recherches Agricoles du Bénin
cg.contributor.affiliationAhmadu Bello University
cg.contributor.affiliationSavanna Agricultural Research Institute, Ghana
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectMaize
cg.journalCrop Science
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid78101
cg.identifier.doihttps://dx.doi.org/10.2135/cropsci2012.11.0640


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