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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

Maize improvement at the International Institute of Tropical Agriculture (IITA), which began in the 1970s, built on the germplasm and experience of earlier years. The main breeding emphasis was to develop maize cultivars and hybrids with high yield potential and durable resistance to diseases and...


Kamara, A.Y.Menkir, A.Fakorede, M.A.B.Ajala, S.O.Badu-Apraku, B.Kureh, I.[Agronomic performance of maize cultivars representing three decades of breeding in the Guinea Savannas of West and Central Africa]Agronomic performance of maize cultivars representing three decades of breeding in the Guinea Savannas of West and Central Africa

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

Drought occurrence and striga hermonthica (Del.) Benth infestation are formidable maize (Zea mays L.) production constriants in the savanna zones of West and Central Africa (WCA). The West and Central Africa collaborative Maize Research Network (WECAMAN), in collaboration with the International I...


Badu-Apraku, B.Fakorede, M.A.B.Menkir, A.Kamara, A.Y.Akanvou, L.Chabi, Y.[Response of early maturing maize to multiplestresses in the Guinea savanna of West and Central Africa]Response of early maturing maize to multiplestresses in the Guinea savanna of West and Central Africa

Recurrent selection under artificial S. hermonthica infestation has significantly reduced the number of emerged Striga plants and increased grain yield under Striga infestation in broad-based populations. These populations have been sources of varieties and inbred lines with consistently high lev...


Menkir, A.Badu-Apraku, B.Yallou, C.G.Kamara, A.Y.Ejeta, G.[Breeding maize for broad-based resistance to striga hermonthica]Breeding maize for broad-based resistance to striga hermonthica

Early-maturing provitamin A (PVA) quality protein maize (QPM) hybrids with combined drought and low soil nitrogen (low-N) tolerance are needed to address malnutrition and food security problems in sub-Saharan Africa (SSA). The current study's objectives were to (i) examine combining ability of se...


Obeng-Bio, E.Badu-Apraku, B.Ifie, B.E.Danquah, A.Blay, E.T.Annor, B.[Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments]Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments

The GGE biplot tool has potential for determining combining ability effects, identifying distinct heterotic groups and efficient testers in a line × tester study. However, its use for such analysis has not been adequately explored. The objectives of this study were to (i) assess combining ability...


Badu-Apraku, B.Akinwale, R.O.[Biplot analysis of line X tester data of maize (Zea mays L.) inbred lines under stress and nonstress environments]Biplot analysis of line X tester data of maize (Zea mays L.) inbred lines under stress and nonstress environments

The magnitude and type of genetic variability are of prime importance to breeders in determining whether or not to improve a breeding population and the method to use. The early maturing population, TZE-W Pop DT STR, has gone through three cycles of S1 recurrent selection for improvement for grai...


Badu-Apraku, B.[Genetic variances and correlations in an early tropical white maize population after three cycles of recurrent selection for Striga resistance]Genetic variances and correlations in an early tropical white maize population after three cycles of recurrent selection for Striga resistance

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