Improvement of yield and other traits of extra early maize under stress and nonstress environments

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dc.creatorBadu-Apraku, Baffour
dc.creatorFakorede, M.A.B.
dc.creatorLum, A.F.
dc.creatorAkinwale, R.
dc.date2009
dc.date2018-01-15T10:50:47Z
dc.date2018-01-15T10:50:47Z
dc.date.accessioned2026-06-27T16:03:27Z
dc.descriptionStriga, 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.identifierhttps://hdl.handle.net/10568/90190
dc.identifier.urihttp://hdl.handle.net/123456789/121263
dc.languageen
dc.rightsLimited Access
dc.sourceBadu-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.subjectstriga resistance
dc.subjectdrought
dc.subjectfood security
dc.subjectsavanna ecology
dc.subjectmaize production
dc.subjectcrop production
dc.subjectfertilizers
dc.subjectgenotypes
dc.titleImprovement of yield and other traits of extra early maize under stress and nonstress environments
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)