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dc.contributor.authorBadu-Apraku, B.
dc.contributor.authorFakorede, M.A.B.
dc.contributor.authorLum, A.F.
dc.contributor.authorAkinwale, R.
dc.identifier.citationBadu-Apraku, B., Fakorede, M.A.B., Lum, A.F. & Akinwale, R. (2009). Improvement of yield and other traits of extra-early maize under stress and nonstress environments. Agronomy Journal, 101(2), 381-389.
dc.description.abstractStriga, drought, and low soil fertility constrain maize (Zea mays L.) productivity in West and Central Africa. Two Striga-resistant extra-early populations, TZEE-W Pop STR C0 (white) and TZEE-Y Pop STR C0 (yellow) were evaluated in field trials in Nigeria, from 2005 to 2007 to assess progress in improvements for grain yield, Striga resistance, and other traits when Striga-free, Striga-infested, and under low- and high-N. Under Striga infestation, yield gain from C0 to C4 was 136 kg ha−1 for the yellow population and 71 kg ha−1 cycle−1 for the white. The yield gain in advanced cycles of selection in the yellow was associated with decreases in Striga emergence at 8 and 10 weeks after planting (WAP) and Striga damage at 8 WAP while that of the white was accompanied by increased days to silking and ears per plant as well as a decrease in Striga emergence at 8 WAP. Under Striga-free conditions, yield gain from C0 to C4 was 164 kg ha−1cycle−1 for the white and 221 kg ha−1 cycle−1 for the yellow. The yield gain in advanced cycles of selection was more pronounced under high-N (157 kg ha−1 cycle−1) than low-N (144 kg ha−1cycle−1) in the yellow, and higher under low-N than high-N in the white. Selection in the yellow was accompanied by increased days to anthesis and silking, plant and ear heights under low-N and increased days to silking under high-N. In the white, selection induced increased days to anthesis, ear height, and decreased anthesis-silking interval.
dc.subjectStriga Resistance
dc.subjectTzee-Y Pop Str C0
dc.subjectFood Security
dc.subjectSavanna Ecology
dc.subjectMaize Production
dc.subjectCrop Production
dc.titleImprovement of yield and other traits of extra early maize under stress and nonstress environments
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationObafemi Awolowo University
cg.contributor.affiliationUniversity of Buea
cg.coverage.regionWest Africa
cg.coverage.regionCentral Africa
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectDisease Control
cg.iitasubjectCrop Husbandry
cg.iitasubjectFarm Management
cg.iitasubjectFood Security
cg.iitasubjectGenetic Improvement
cg.iitasubjectHandling, Transport, Storage And Protection Of Agricultural Products
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectPlant Production
cg.iitasubjectSoil Fertility
cg.journalAgronomy Journal
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access

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