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      Profitability of striga tolerant maize variety (SAMMAZ 17) amongst smallholder farmers in Lapai, Niger State, Nigeria

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          Abstract

          The study was conducted in Lapai, Niger State, North central Nigeria to determine the profitability of improved maize variety (SAMMAZ 17) in cooperative farmer's fields. Demonstration plots were cited in three cooperative farms where the improved variety and a local variety were planted. All agronomic practices were carried out uniformly and simultaneously on the plots. In addition, structured questionnaires were administered to 20 members of each of the cooperative farms. Participants were selected by means of simple random sampling techniques to solicit information on the performance of SAMMAZ 17 maize variety on their farms. Descriptive statistics were used to analyse the socio-economic characteristics of the farmers, while gross margin analysis was used to compare the profitability of maize varieties. The results revealed that maize farmers were mostly male and small-scale in operations. The local maize variety supported high Striga infestation with low yield of 1.7 t/ha, while SAMMAZ 17 yield was 4.4 t/ha under less Striga infestation. The gross margin production of SAMMAZ 17 maize variety was N 254,127.40, while the gross margin for the production of farmer's maize variety was N 102,517.90. Based on these findings, SAMMAZ 17 was found to be profitable and is therefore recommended for planting in Striga endemic fields in North Central Nigeria.

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          Genetic diversity of Striga hermonthica and Striga asiatica populations in Kenya

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            Striga parasitizes transgenic hairy roots of Zea mays and provides a tool for studying plant-plant interactions

            Background Striga species are noxious root hemi-parasitic weeds that debilitate cereal production in sub-Saharan Africa (SSA). Control options for Striga are limited and developing Striga resistant crop germplasm is regarded as the best and most sustainable control measure. Efforts to improve germplasm for Striga resistance by a non-Genetic Modification (GM) approach, for example by exploiting natural resistance, or by a GM approach are constrained by limited information on the biological processes underpinning host-parasite associations. Additionaly, a GM approach is stymied by lack of availability of candidate resistance genes for introduction into hosts and robust transformation methods to validate gene functions. Indeed, a majority of Striga hosts, the world’s most cultivated cereals, are recalcitrant to genetic transformation. In maize, the existing protocols for transformation and regeneration are tedious, lengthy, and highly genotype-specific with low efficiency of transformation. Results We used Agrobacterium rhizogenes strain K599 carrying a reporter gene construct, Green Fluorescent Protein (GFP), to generate transgenic composite maize plants that were challenged with the parasitic plant Striga hermonthica. Eighty five percent of maize plants produced transgenic hairy roots expressing GFP. Consistent with most hairy roots produced in other species, transformed maize roots exhibited a hairy root phenotype, the hallmark of A. rhizogenes mediated transformation. Transgenic hairy roots resulting from A. rhizogenes transformation were readily infected by S. hermonthica. There were no significant differences in the number and size of S. hermonthica individuals recovered from either transgenic or wild type roots. Conclusions This rapid, high throughput, transformation technique will advance our understanding of gene function in parasitic plant-host interactions.
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              Striga infestation in Kenya: Status, distribution and management options

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                sajae
                South African Journal of Agricultural Extension
                S Afr. Jnl. Agric. Ext.
                South African Society of Agricultural Extension (SASAE) (Pretoria, Gauteng, South Africa )
                0301-603X
                2413-3221
                2017
                : 45
                : 1
                : 1-9
                Affiliations
                [02] Zaria orgnameABU orgdiv1Department of Agricultural Economics and Rural Sociology Nigeria
                [03] Zaria orgnameABU orgdiv1Department of Plant Science Nigeria
                [04] Lapai Niger State orgnameIbrahim Badamasi Babangida University orgdiv1Department of Agricultural Economics and Extension Services Nigeria
                [01] Lapai Niger State orgnameIbrahim Badamasi Babangida University orgdiv1Department of Crop Production Nigeria
                [05] Niger State orgnameNational Cereals Research Institute P. M. B. 8 Badeggi Nigeria
                Article
                S0301-603X2017000100001
                10.17159/2413-3221/2017/v45n1a400
                68feb8ad-7716-4c2b-bcbf-f3bcdaa80603

                This work is licensed under a Creative Commons Attribution 4.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 9
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                SciELO South Africa


                Maize,Striga tolerant,cooperative farm,action research,farmer's variety,gross margin,profitability,extension implication

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