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Secondary traits can improve precision with which drought or low soil nitrogen (low-N) tolerant maize (Zea mays L.) genotypes are identified, compared to measuring only grain yield under each stress. The objective of this study was to identify secondary traits for indirect selection for yield imp...


Badu-Apraku, B.Akinwale, R.O.Ajala, S.O.Menkir, A.Fakorede, M.A.B.Oyekunle, M.[Relationships among traits of tropical early maize cultivars in contrasting environments]Relationships among traits of tropical early maize cultivars in contrasting environments

Vitamin 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...


Badu-Apraku, B.Fakorede, M.A.B.Talabi, A.O.Oyekunle, M.Aderounmu, M.Lum, A.F.Ribeiro, P.F.Adu, G.B.Toyinbo, J.O.[Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments]Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments

Maize is the most important staple cereal crop in sub-Saharan Africa (SSA) and has great potential to rectify the food insecurity in the sub-region. A study was conducted at four locations two each in Nigeria and Benin in 2010 and 2011 to determine the rate of genetic improvement in the grain yie...


Badu-Apraku, B.Yallou, C.Oyekunle, M.[Genetic gains from selection for high grain yield and Striga resistance in early maturing maize cultivars of three breeding periods under Stigainfested and Strigafree environments]Genetic gains from selection for high grain yield and Striga resistance in early maturing maize cultivars of three breeding periods under Stigainfested and Strigafree environments

Maize (Zea mays L.) has the greatest yield potential in savannas of West and Central Africa (WCA). However, production in this agroecology is constrained by low levels of N, drought, and parasitism by striga [Striga hermonthica (Del) Benth.]. Diallel crosses involving 17 extra-early white maize i...


Badu-Apraku, B.Oyekunle, M.Akinwale, R.Aderounmu, R.O.[Combining ability and genetic diversity of extraearly white maize inbreds under stress and nonstress environments]Combining ability and genetic diversity of extraearly white maize inbreds under stress and nonstress environments

A base index involving Striga damage, number of emerged Striga plantsand ears per plant is used for selecting for maize (Zea mays L.) grainyield under Striga infestation. There are contradictory reports on the reliabilityof number of emerged Striga plants for selecting for Striga resistance.The o...


Badu-Apraku, B.Akinwale, R.Oyekunle, M.[Efficiency of secondary traits in selecting for improved grain yield in extraearly maize under Strigainfested and Strigafree environments]Efficiency of secondary traits in selecting for improved grain yield in extraearly maize under Strigainfested and Strigafree environments

Badu-Apraku, B.Gedil, M.Fakorede, M.A.B.Akinwale, R.Fasanmade, Y.Annor, B.Talabi, A.O.Oyekunle, M.Akaogu, I.C.Aderounmu, M.[Gene action and heterotic groups of early white quality protein maize inbreds under multiple stress environments]Gene action and heterotic groups of early white quality protein maize inbreds under multiple stress environments

Four cycles of S1 family recurrent selection to improve grain yield and resistance to Striga hermonthica have been completed in TZE-Y Pop STR C0. In order to determine whether or not to continue with the recurrent scheme, it was desirable to evaluate the amount of residual genetic variance and as...


Badu-Apraku, B.Akinwale, R.O.Fakorede, M.A.B.Oyekunle, M.Franco, J.[Relative changes in genetic variability and correlations in an earlymaturing maize population during recurrent selection]Relative changes in genetic variability and correlations in an earlymaturing maize population during recurrent selection
Badu-Apraku, B.Fakorede, M.A.B.Oyekunle, M.Akinwale, R.[Genetic gains in grain yield under nitrogen stress following three decades of breeding for drought tolerance and Striga resistance in early maturing maize]Genetic gains in grain yield under nitrogen stress following three decades of breeding for drought tolerance and Striga resistance in early maturing maize
Badu-Apraku, B.Fakorede, M.A.B.Oyekunle, M.Akinwale, R.[Breeding striga resistant early and extra-early maize hybrids for West African farmers]Breeding striga resistant early and extra-early maize hybrids for West African farmers

Maize (Zea mays L.) production in west Africa (WA) is constrained by drought, Striga hermonthica infestation and low soil nitrogen (N). Maize varieties resistant to Striga, drought, and low N are ideal for WA, but genotype × environment interaction on these traits are usually significant due to d...


Badu-Apraku, B.Menkir, A.Ajala, S.Akinwale, R.Oyekunle, M.Obeng-Antwi, K.[Performance of tropical early maturing maize cultivars in multiple stress environments]Performance of tropical early maturing maize cultivars in multiple stress environments

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