Improving cultivation of cowpea in West Africa

Kamara, A. Y.; Omoigui, L O; Kamai, Nkeki; Ewansiha, S.U.; Ajeigbe, H A

doi:10.19103/as.2017.0023.30

Cited by 27 publications

(19 citation statements)

References 34 publications

(43 reference statements)

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“…Similar results were reported by Mashi (2006), Bhokre and Joshi (2015), Wood (2016) and Komara (2018) which agreed with our findings. Adding sodium carbonate or baking powder to soaking and cooking solutions speed up cooking time of all genotypes.…”

Section: Resultssupporting

confidence: 94%

“…Such high estimates might suggest the ability to achieve possible genetic improvement in cooking time of cowpea seeds which might reflect on their cooking quality. Our results agreed with the findings of IYP (2016), Wood (2016), Asiwe ( 2018) Komara (2018) and Tongum (2018) who mentioned that heritability estimates for cooking time were high and more than 70%. Interestingly, the black colored seeds appeared to need shorter cooking time than red colored seeds, while round seeds needed long time to cook.…”

Section: Resultssupporting

confidence: 92%

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Evaluation of Cooking Times of Egyptian and Introduced Cowpea (Vigna Unguiculata) Genotypes Under Different Cooking Conditions

Soaud¹,

Abdelsayyed²,

Mahgoub³

et al. 2020

PLANT ARCHIVES

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Cooking times of fourteen Egyptian and introduced cowpea genotypes were evaluated under different cooking conditions. Soaking treatments manifested shorter time than unsoaked treatments. Adding sodium bicarbonate or baking powder to soaking and cooking solutions gave more shorter cooking time. Microwaves treatment gave the shortest cooking time than all other treatments and conserved as a new approach. All studied cowpea genotypes and all cooking treatments exhibited significant variations. The blacked colored seeds needed shorter cooking time than the red seeds, while round or small seeds needed longer time to complete cooking. The observed significant differences among the genotypes were reflected to genotypic and phenotypic variations and consequently to high broad sense heritability estimates and to high values of genetic advances. Such estimates suggested the ability to achieve possible improvement in cooking time of cowpea seeds which might eventually reflect on their cooking quality.

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Section: Resultssupporting

confidence: 94%

Section: Resultssupporting

confidence: 92%

Evaluation of Cooking Times of Egyptian and Introduced Cowpea (Vigna Unguiculata) Genotypes Under Different Cooking Conditions

Soaud¹,

Abdelsayyed²,

Mahgoub³

et al. 2020

PLANT ARCHIVES

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“…Cowpea contributes to food and nutrition security and income generation of millions of households in semi-arid tropics, including Asia, Africa, and Latin America [3,6,7]. Although cowpea thrives in drought prone environments and on poor soils [8], it is highly susceptible to pest and diseases, which leads to the low yields (25-600Kg/ha) reported in the production areas [3,[9][10][11]. This is a threat to world food security, and calls for constant efforts by breeding programmes to explore, create and use diversity within the species in order to overcome the various biotic and abiotic constraints and meet consumers' preferences.…”

Section: Introductionmentioning

confidence: 99%

DArT-seq based SNP analysis of diversity, population structure and linkage disequilibrium among 274 cowpea (Vigna unguiculata L. Walp.) accessions

Sodedji

Agbahoungba

Agoyi

et al. 2020

Preprint

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Background: Genetic diversity in a germplasm is crucial for continuous improvement of crop varieties. A panel of 274 cowpea ( Vigna unguiculata L.) accessions of unknown genetic diversity was assembled from diverse sources. This study used 3127 SNP markers, generated with the diversity array technology (DArT), to assess genetic diversity, population structure and linkage disequilibrium (LD) in the assembled germplasm. Results: The population structure analysis inferred three subpopulations within the germplasm, which was confirmed by Neighbour-Joining (NJ) clustering and principal component analysis (PCA). Low genetic distances (0.005 to 0.44) were observed between accessions. Accessions from Africa; West and Central Africa (113 accessions), East and Central Africa (93 accessions), and Asia (53 accessions) were predominant in the germplasm; and distributed across all subpopulations. High fixation indexes (0.48≤F ST ≤0.56) were obtained for the inferred subpopulations. AMOVA revealed a very large contribution of within subpopulations variation to the observed genetic variation in the germplasm. However, the expected heterozygosity (He) was higher than the observed heterozygosity (Ho), indicating high proportion of inbred lines in the germplasm. Linkage Disequilibrium (LD) was observed in the germplasm, which showed a low decay at longer physical distance between markers in the genome. Conclusions: Significant genetic structuration exists in the assembled cowpea germplasm which shows that there is a potential for improvement of the crop. The subgroups consisted mainly of inbred lines which, although from different geographical regions shared alleles in common reflecting high movement of seeds and exchange of germplasm between regions. The presence of linkage disequilibrium in the germplasm paves a way for prospective whole genome-wide association studies in cowpea for quality attributes and important agronomic traits.

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“…Generally, cowpea yields are very low under smallholder cropping systems. The grain yield in farmers' fields is frequently less than 500 kg ha −1 (Sambo, 2013), while cowpea grain yields ranging from 1500 to 2500 kg ha −1 were obtained in Research Stations (Kamara et al, 2018). Low yields in farmers' fields have been ascribed to a multitude of factors including inappropriate agronomic practices, drought conditions, inherent low soil fertility, and continual decline in soil fertility due to poor soil management (Voortman, 2010).…”

Section: Introductionmentioning

confidence: 99%

Agronomic and economic benefits of integrated nutrient management options for cowpea production

Issoufa

Ibrahim²,

Abaidoo

2020

Ex. Agric.

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The limitation of soil amendments and insufficient and irregular rainfall are the main factors accounting for the decline in crop yields in the Sahelian low-input cropping systems. This study explored the agronomic and economic responses of integrated use of millet glume-derived compost with synthetic fertilizer in cowpea-based cropping system. A two-year field experiment was laid out as factorial design arranged in randomized complete blocks with three rates of compost (0, 4000, and 8000 kg ha−1) and three rates of recommended synthetic fertilizer (0, 50, and 100%). Cowpea grain yield increased markedly with combined application of compost and synthetic fertilizer. The combined use of compost applied at 8000 kg ha−1 and 50% of the recommended rate of synthetic fertilizer increased cowpea grain yield by 51% compared to the application of 100% of the recommended rate of synthetic fertilizer. The rainwater use efficiency (RaUE) increased by 52 and 49% with the combined application of compost at 8000 kg ha−1 along with 50% of the recommended rate of synthetic fertilizer when compared to the application of 100% of the recommended rate of synthetic fertilizer in 2013 and 2014, respectively. All treatments induced a positive net income, and the highest value/cost ratio was achieved with combined application of compost and synthetic fertilizer. This study highlights the possibility of improving cowpea productivity through combined use of composted locally available organic input with half of the recommended rate of synthetic fertilizer. This combination would reduce the investment in mineral fertilizer currently made by smallholder farmers in the Sahelian low-input cowpea cropping system and reduce environmental pollution resulting from the current practice of burning the millet glume.

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Improving cultivation of cowpea in West Africa

Cited by 27 publications

References 34 publications

Evaluation of Cooking Times of Egyptian and Introduced Cowpea (Vigna Unguiculata) Genotypes Under Different Cooking Conditions

Evaluation of Cooking Times of Egyptian and Introduced Cowpea (Vigna Unguiculata) Genotypes Under Different Cooking Conditions

DArT-seq based SNP analysis of diversity, population structure and linkage disequilibrium among 274 cowpea (Vigna unguiculata L. Walp.) accessions

Agronomic and economic benefits of integrated nutrient management options for cowpea production

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