Drivers of conservation and utilization of pineapple genetic resources in Benin

Valuation of farmer knowledge has been seen as a route to promote sustainable use of plant genetic resources. In pineapple production systems in Benin, inadequate knowledge of cultivation practices can lead to a number of inconveniences including abandon of some varieties and cultivars. To understand how farmers' knowledge and cultivation practices impact the sustainable utilization of pineapple genetic resources, we surveyed 177 pineapple farmers in southern Benin. We assessed farmers' knowledge and analyzed the relationship between their knowledge and factors such as age, education, and locality of provenance. Pineapple production system was dominated by men (96% respondents). According to farmers, Smooth cayenne is international market-oriented while Sugarloaf mainly targets domestic and regional markets. All farmers recognized that Smooth cayenne provided more income (USD 5,750/ha) than sugarloaf (USD 3,950/ha) in the production systems of southern Benin. The high value of median scores in comparison with the range of possible score showed that most farmers agreed and shared relatively similar knowledge. Correlation matrix and multiple linear regressions showed a significant relationship between farmers'practices and their knowledge of the plant; their knowledge of pineapple varieties is based on fruits traits. Also, farmers' knowledge was associated with locality of provenance. Constraints and options for genetic resources conservation and utilization in the pineapple production systems in Southern Benin were discussed based on current knowledg

Sustainable use and conservation of Vitex doniana Sweet: unlocking the propagation ability using stem cuttings

One of the major constraints for domesticating widely used wild tree resources by local communities is the lack of adequate propagation techniques. In the case of Vitex doniana, seed propagation has usually been reported difficult and vegetative regeneration is rarely explored. To understand how stem cutting size or hormone application affect the regeneration and early growth ability in that species we used two categories of cutting diameter (1cmVitex doniana to reduce the pressure on wild tree population in Benin

Current knowledge on Amaranthus spp.: research avenues for improved nutritional value and yield in leafy amaranths in sub-Saharan Africa. Euphytica

Abstract In the past 20 years, very little progress has been achieved in reducing food insecurity, child malnutrition and hunger in Africa. Under-nutrition and micronutrients deficiencies are widespread and affect mainly women and children. To address these problems, increased consumption of African leafy vegetables is promoted as sources of both micronutrients and bio-active compounds. Widely promoted African leafy vegetables include Amaranthus spp., a taxonomic group cultivated worldwide. Species of this genus are used as pseudo-cereals in Europe and America, and are mostly planted as vegetables in Africa. Amaranthus has been rediscovered as a promising food crop mainly due to its resistance to heat, drought, diseases and pests, and the high nutritional value of both seeds and leaves. Leaves are rich in proteins and micronutrients such as iron, calcium, zinc, vitamin C and vitamin A. All parts of the plant are used as medicine to heal many diseases in African communities. This paper focuses on leafy amaranths traditionally utilized on the continent. It briefly reviews the current knowledge on taxonomy, ecology, nutritional and nutraceutical value, production and cultivation systems, reproductive biology, genetic resources and breeding of amaranths. Species of interest include: A. blitum, A. caudatus, A. cruentus, A. dubius, A. hypochondriacus, A. spinosus, A. thunbergii, A. tricolor, and A. viridis. Research and development opportunities on nutritive and nutraceutical properties, production and commercialization, taxonomic evaluation and breeding perspectives were explored

Modelling socioeconomic determinants for cultivation and in-situ conservation of Vitex doniana Sweet (black plum), a wild-harvested economic plant in Benin

Background: Cultivation is the most appropriate management option when both demand and harvesting of wild plant species increase beyond natural production levels. In the current study we made the assumption that, besides the intrinsic biological and ecological characteristics of the species, the decision to cultivate and/or to conserve an overharvested wild plant species is triggered by the socioeconomic factors such as land tenure and size, origin of respondents, gender, and users’ knowledge of the plant phenology. Methods: We carried out semi-structured interviews with 178 informants involved in V. doniana exploitation. The data collected were related to socio-demographic characteristics of informants’ household situation, knowledge of the biology and propagation of the species, willingness to cultivate the species, in-situ maintenance of populations, and costs associated with management of the species. According to data types we used Student’s t, Spearman correlation, Kruskal-Wallis, Fisher’s exact and χ2 tests to test the effects of land tenure, origin of respondents, gender and users’ knowledge of plant phenology on the decision making process. Conditional inference tree models and generalized additive models were also used to identify variables which were significantly determinant in the decision to cultivate and/or to conserve the species in-situ. Results: We found that men were more willing to cultivate the species than women and this is conditioned by land area available. The willingness to conserve the species in-situ depends mainly on the total land area available, the number of trees within the landscape, accessibility of the trees, land tenure, gender, location, seedling cost, and trade-off cost for conservation. People who offered more than one US dollar to acquire a seedling of V. doniana, landowners, and those who own a total land area in excess of 6.5 ha were most willing to conserve the species in-situ. Conclusions: From our findings we conclude that future management and conservation initiatives for V. doniana should first target specific user groups for sustainable exploitation of the species. Also, the Cultivation Opportunity Ratio is an important indicator for quick determination of the likelihood of farmers to engage into cultivation and conservation of the species

Origin-dependence of variation in seed morphology, mineral composition and germination percentage in Gynandropsis gynandra (L.) Briq. accessions from Africa and Asia

Background: Spider plant [Gynandropsis gynandra (L.) Briq.], an economically promising African leafy vegetable, characterized for leaf yield components and nutritive quality, exhibits poor seed germination that hinders a wider expansion of the crop in urban and periurban horticultural systems. So far, there is little information pertaining to seed morphological traits and mineral elements content that may be associated with higher seed germination. This research investigated the hypothesis that spider plants from different geographical areas exhibited differences in seed mineral composition, morphological traits, and germination capacity. To this end, twenty-nine accessions of Gynandropsis gynandra from West and East-Southern Africa, and Asia were screened for variation in seed size (area, perimeter, length, width), 10-seed weight, mean germination time, germination percentage and mineral content variations. The scanning electron microscopy (SEM), light microscopy and energy dispersive spectroscopy (EDS) solution were used to study seed morphology and mineral composition. Results: We show for the first time the external and internal structure of the seeds of Gynandropsis gynandra and measured eight mineral elements, including carbon (C), oxygen (O), magnesium (Mg), aluminium (Al), phosphorus (P), sulphur (S), potassium (K) and calcium (Ca). The accessions differed significantly (p < 0.001) with respect to seed size (area, perimeter, length, width), 10-seed weight, mean germination time and germination percentage. The hierarchical cluster analysis based on fourteen variables grouped the accessions into three distinct clusters, partially dependent on their geographical origin. Asian accessions exhibited smaller seeds and recorded higher values in terms of germination percentage. West African accessions had bigger seeds but with lower germination percentage. Variation in minerals such as potassium, carbon, and calcium content showed different patterns according to geographical origins. Conclusion: Smaller seeds in G. gynandra exhibited better germination capacity. The Asian germplasm is a potential source of cultivars with a higher germination percentage for improving seed quality in the species.</p

Plant genetic resources and food security in West and Central Africa: Regional Conference, 26-30 April 2004

The Regional Conference on Plant Genetic Resources and Food Security in West and Central Africa was held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria from 26 to 30 April 2004. Ninety-five scientists and agricultural research managers from 13 countries and 18 institutions and organizations attended the conference that was organized under the auspices of Conseil Ouest et Centre Africain pour la Recherche et le Développement (CORAF). It took about two years to organize it. Partner institutions including the Conference of Directors for Agronomic Research in West and Central Africa (CORAF), Bioversity International, the International Institute of Topical Agriculture (IITA), Food and Agriculture Organization (FAO), the West Africa Rice Development Association (WARDA), the International Crops Research Institute for Semi-Arid Tropics (ICRISAT), the Desert Margin Programme (DMP), the World Agroforestry Centre (ICRAF), the System-Wide Genetic Resources Programme (SGRP) and the Genetic Resources Policy Initiative (GRPI) co-funded and organized the conference assisted by the Technical Centre for Agricultural and Rural Cooperation (CTA) and Syngenta. The main outcomes from the deliberations are presented in this synthesis report. The main goal of the conference was to provide a forum for assessing the state of plant genetic resources (PGR) conservation and management in West and Central Africa (WCA), and to explore methods of strengthening regional collaboration. The specific objectives were: To assess the state of, and mechanisms for, management and sustainable use of plantgenetic resources in WCA countries;To enhance awareness on new global and regional plant genetic resources (PGR)developments and policy frameworks;To establish mechanisms and strategies for promotion of collaboration and coordination at regional and country levels on PGR conservation, management and policies in the sub-region. This conference gave a unique opportunity to scientists in WCA to assess the state of genetic resources conservation, management and use in the sub-region. They explored mechanisms for strengthening regional collaboration and discussed how these resources can be managed to solve food insecurity in the region. The national research institutes, under the framework of CORAF and the various CGIAR Centres (Bioversity, IITA, WARDA, ICRISAT) working in WCA, and FAO decided to work closely together for the benefit of genetic resources. Many initiatives are already being developed in the region and the conference emphasised the necessity to link all those initiatives and to ensure that the region is not left out in genetic resources conservation and use. The conference ended with a declaration and communiqué

Designing User-Friendly Grids for the Gender-Specification of Rural, Semi-Urban, and Urban School Toilets in West Africa: Lessons from the Republic of Benin

Gender equity, quality education, and sanitation in rural and urban areas are widely considered as development imperatives. However, while many countries of the world are already far with the gendering of their schools’ toilets, most others still tend to systematically construct the same number of toilet cabins for female and male students, often ignoring specific needs associated with biophysical differences and disabilities among the students. This poor gendering of school toilets prevailed in the Republic of Benin until 2013, when, within the framework of the Pluriannual Water and Sanitation Programme (PPEA phase 2) funded by the Netherlands’ Ministry of Cooperation through its Embassy in the Republic of Benin, the Directorate of Hygiene and Sanitation of the Ministry of Public Health in collaboration with Water and Sanitation for Africa Agency, decided to launch a study for gender and disability specific toilets in primary and secondary schools. This original paper discusses the process towards the design of norms and grids for the calculation of toilet cabins and urinals needs of primary and secondary school students of rural, semi-urban, urban, Sahelian, Sudanian, lake, and coastal areas of the Republic of Benin. The study took place in four steps. The first step consisted of identifying key factors that affect the use of school toilets by students, especially female and disabled students. The second step consisted of observing and recording the use of school toilets by students, and building on those observations and records to estimate the number of toilet cabins and urinals required per agroecological and sociocultural area. The third step built on the results from the first and second steps to design simplified grids that allow sanitation and schools’ decision-makers to easily and quickly calculate the number of toilet cabins and urinals required for the target schools, per gender and disability. The fourth step consisted of building the capacities of potential users of the grids, for their relevant use. The findings indicate a variation of needs among primary and secondary schools, and the study zones, due to sociocultural and development differences. The grids have been in use in Benin since 2016 and it has easily helped to calculate gender-specific toilet needs in the study areas. After five years of use, their performance requires to be assessed for further adaptations. A further paper will report on the performance of these grids

Designing User-Friendly Grids for the Gender-Specification of Rural, Semi-Urban, and Urban School Toilets in West Africa: Lessons from the Republic of Benin

Gender equity, quality education, and sanitation in rural and urban areas are widely considered as development imperatives. However, while many countries of the world are already far with the gendering of their schools’ toilets, most others still tend to systematically construct the same number of toilet cabins for female and male students, often ignoring specific needs associated with biophysical differences and disabilities among the students. This poor gendering of school toilets prevailed in the Republic of Benin until 2013, when, within the framework of the Pluriannual Water and Sanitation Programme (PPEA phase 2) funded by the Netherlands’ Ministry of Cooperation through its Embassy in the Republic of Benin, the Directorate of Hygiene and Sanitation of the Ministry of Public Health in collaboration with Water and Sanitation for Africa Agency, decided to launch a study for gender and disability specific toilets in primary and secondary schools. This original paper discusses the process towards the design of norms and grids for the calculation of toilet cabins and urinals needs of primary and secondary school students of rural, semi-urban, urban, Sahelian, Sudanian, lake, and coastal areas of the Republic of Benin. The study took place in four steps. The first step consisted of identifying key factors that affect the use of school toilets by students, especially female and disabled students. The second step consisted of observing and recording the use of school toilets by students, and building on those observations and records to estimate the number of toilet cabins and urinals required per agroecological and sociocultural area. The third step built on the results from the first and second steps to design simplified grids that allow sanitation and schools’ decision-makers to easily and quickly calculate the number of toilet cabins and urinals required for the target schools, per gender and disability. The fourth step consisted of building the capacities of potential users of the grids, for their relevant use. The findings indicate a variation of needs among primary and secondary schools, and the study zones, due to sociocultural and development differences. The grids have been in use in Benin since 2016 and it has easily helped to calculate gender-specific toilet needs in the study areas. After five years of use, their performance requires to be assessed for further adaptations. A further paper will report on the performance of these grids