Soil acidity is a limiting factor that has a major impact on maize yield and development. The aim of this research was to determine the breeding value of inbred lines and to assess the hybrid maize test-cross production in acid soil. A line x tester study involving 63 test-crosses formed by crossing 20 maize inbred lines with 3 testers and between testers themselves, as well as 1 standard search, was conducted in two contrasted regions with aluminium and manganese toxicity during the 2012 cropping season in Cameroon. A randomised complete block template of three replications was used to assess both acid and non-acid soil treatments with dolomitic lime. Seven hybrids were discovered that produced high grain yields (4.27 to 9.88 t/ha), had high specific combining capacity (SCA), and had a slow rate of yield loss, and were acidic soil resistant. Similarly, four inbred lines with strong general combining potential (GCA) were maintained as successful progenitors (ATP-46, 87036, and Cam Inb gp117, C4SRRA7). The GCA and SCA effects showed that genes with additive effects mediated resistance to aluminum toxicity, while genes with non-additive effects dominated on acid soil with manganese toxicity. However, a molecular characterization of the selected varieties would be needed for a possible extension.
Author (s) DetailsHonoré Tekeu
Department of Plant Biology, University of Yaounde I, BP 812 Yaounde, Cameroon and Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, QC, Canada.
Liliane N. Tandzi
Department of Agriculture, College of Basic and Apply Sciences, University of Ghana, P.O.Box 30, Legon, Ghana and Department of Crop Production Technology, College of Technology, University of Bamenda, Bambili, Cameroon.
Eddy E. M. Ngonkeu
Department of Plant Biology, University of Yaounde I, BP 812 Yaounde, Cameroon and Institute of Agricultural Research for Development (IRAD), BP 2123 Yaoundé, Cameroon.
Pierre F. Djocgoué
Department of Plant Biology, University of Yaounde I, BP 812 Yaounde, Cameroon.
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