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Badu-Apraku, B.Yallou, C.Oyekunle, M.Akinwale, R.Aweke, G.Kamara, A.[Consistency of performance of early-maturing maize cultivars in Striga infested and Striga-free environments]Consistency of performance of early-maturing maize cultivars in Striga infested and Striga-free environments

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

Identification of outstanding maize (Zea mays L.) hybrids for target environments is complicated by genotype × environment interactions. Thirty-two early-maturity maize hybrids were evaluated at eight locations in Nigeria and six locations in Ghana for 2 yr to (i) identify high-yielding, stable h...


Oyekunle, M.Haruna, A.Badu-Apraku, B.Usman, I.S.Mani, H.Ado, S.G.Olaoye, G.Obeng-Antwi, K.Abdulmalik, R.O.Ahmed, H.O.[Assessment of early-maturing maize hybrids and testing sites using GGE biplot analysis]Assessment of early-maturing maize hybrids and testing sites using GGE biplot analysis

Multi-environment trials (METs) in West Africa have demonstrated the existence of genotype×environment interactions (G×E), which complicate the selection of superior cultivars and the best testing sites for identifying superior and stable genotypes. Two powerful statistical tools available for ME...


Badu-Apraku, B.Oyekunle, M.Obeng-Antwi, K.Osuman, A.S.Ado, S.G.Coulibaly, N.Yallou, C.G.Abdulai, M.S.Boakyewaa, G.A.Didjeira, A.[Performance of extraearly maize cultivars based on GGE biplot and AMMI analysis]Performance of extraearly maize cultivars based on GGE biplot and AMMI analysis

Appropriate testers are needed as well as information on heterotic patterns of tropical lowland early-maturing germplasm. Diallel crosses involving nine tropical early maturing maize (Zea mays L.) inbreds were evaluated at five locations in Nigeria from 2007 to 2009 under drought stress, when Str...


Badu-Apraku, B.Fontem, Lum. A.Akinwale, R.Oyekunle, M.[Biplot analysis of diallel crosses of early maturing tropical yellow maize inbreds in stress and nonstress environments]Biplot analysis of diallel crosses of early maturing tropical yellow maize inbreds in stress and nonstress environments

Maize (Zea mays L.) hybrids resistant to Striga hermonthica (Del) Benth and tolerant to drought are vital to the sustainability of productivity of the maize-based farming systems of West and Central Africa (WCA). Thirty-six diallel crosses derived from nine early maturing white maize inbreds were...


Badu-Apraku, B.Oyekunle, M.Akinwale, R.O.Lum, A.F.[Combining ability of earlymaturing white maize inbreds under stress and nonstress environments]Combining ability of earlymaturing white maize inbreds under stress and nonstress 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

Drought tolerant maize (Zea mays L.) hybrids are crucial to sustainability of maize production in West and Central Africa (WCA). Two studies were conducted at three locations in Nigeria for 2 yr to (i) assess performance of 156 early-maturing maize inbreds and three hybrid types and (ii) determin...


Oyekunle, M.Badu-Apraku, B.[Hybrid performance and inbredhybrid relationship of early maturing tropical maize under drought and wellwatered conditions]Hybrid performance and inbredhybrid relationship of early maturing tropical maize under drought and wellwatered conditions

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

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