Value chain development for mango (Mangifera indica) around Outamba Kilimi National Park in Sierra Leone: constraints and opportunities for smallholders

Abstract Background Mango is an important tree fruit in Sierra Leone since it participates to food and nutritional security mainly in rural areas. However, the economic potential of this tree fruit is still untapped to a large extent. This situation is due to high loss and poor handling at post-harvest stage preventing farmers from meeting the quality standard for different markets. The aims of this paper were to analyse the constrains and opportunities for mango value chain development, as well as community-based copping strategies developed by chain actors to valorise the existing opportunities for better market development and forest conservation. Methods Data were collected in four sites around the Outamba Kilimi National Park, Sierra Leone, through focus group discussions with men and women groups of 25–35 mango value chain actors in each site. Results Results indicated that mango value chain is composed of nursery suppliers, mango producers, harvesters and assemblers, processors and traders. Main constraints encountered by both men and women are lack of: (1) polythene bags and improved mango seedlings, mineral fertilisers, herbicides, pesticide, (2) training on appropriate mango production practices, (3) appropriate harvesting tools, (4) appropriate processing knowledge and equipment, as well as high transportation cost. Hand weeding, use of available organic fertiliser, seeking of advices from colleagues farmers, equipment from other processors who own local processing equipment were some of the coping strategies developed by various actors along mango value chains. Soil fertility, favourable climatic conditions, technical and financial support from direct or indirect actors through training on good agronomic practices, processing and marketing techniques, availability of hired labour to perform farming and processing operations, existence of local processing plant to serve as outlet for fresh mango were identified as main factors to be exploited to improve mango value chains around Outamba Kilimi National Park in Sierra Leone. Conclusions Our results provided insight into the various factors limiting the performance of mango value chains around Outamba Kilimi National Park in Sierra Leone. This baseline study will help in designing and implementing appropriate strategies to promote mango value chains in the areas around the Outamba Kilimi National Park

Use Patterns, Knowledge Diversity and Drivers for the Cultivation of the Miracle Plant [<i>Synsepalum dulcificum</i> (Schumach & Thonn.) Daniell] in Benin and Ghana

Despite the growing interest in the miracle plant worldwide due to its numerous applications, the threats and the wild harvest of the species hamper its sustainable utilisation. Moreover, traditional knowledge so far documented on the species is limited to a narrow geographical coverage of its natural distribution range, which is West and Central Africa. This study analysed the use variation and knowledge acquisition pattern of the miracle plant among West African sociolinguistic groups and deciphered the drivers of populations’ willingness and readiness to engage in cultivating the species. Semi-structured interviews were conducted with 510 respondents purposively selected from nine sociolinguistic groups in Benin and Ghana using the snowball sampling approach. Information was collected on respondents’ socio-demographic profile, miracle plant ownership, plant parts used and preparation methods, knowledge of the species bioecology, perceived threats on the species, willingness to cultivate, maximum acreage to allocate to the species and maximum price to pay for a seedling. Descriptive statistics, generalized linear models, classification and regression tree models were used for data analysis. The miracle plant ownership mode depended on the age category. Sociolinguistic affiliation, level of schooling, migratory status and religion significantly affected the number of trees owned. We recorded 76 uses belonging to six use categories. The overall use-value of the miracle plant significantly varied according to the respondent sociolinguistic affiliation, main activity and religion. Men were the main source of knowledge and knowledge is mainly acquired along the family line. Knowledge related to food and social uses was mostly acquired from parents and people of the same generation, while magico-therapeutic and medicinal use-related knowledge were inherited from parents and grandparents. Sociolinguistic affiliation, awareness of taboos and market availability were the most important drivers of respondent willingness to cultivate the miracle plant. While the respondent’s level of schooling and perception of plant growth rate determined the maximum acreage they were willing to allocate to the species in cultivation schemes, their main activity, sociolinguistic affiliation and knowledge of the species time to fruiting drove the maximum purchase price they were willing to offer for a seedling of the species. Our findings provide key information for the promotion of miracle plant cultivation in the study area

Genotype × environment interaction and stability analysis for seed yield and yield components in sesame (Sesamum indicum L.) in Benin Republic using AMMI, GGE biplot and MTSI

International audienceIncreasing production requires the development of high yielding cultivars adapted to various environments. Multi-environment trials (MET) remains the best approach to assess the performance of accessions across environments. The objective of this study was to select the best performing and stable accessions of sesame across different environments in Benin Republic. Nineteen sesame accessions were evaluated across eight environments using a randomized complete block design with four replicates. The accessions were evaluated for three traits: days to 50% flowering (D50F), thousand-seed weight (TSW), and seed yield (SY) during 2020 growing season. The stable and top-performing accessions across environments were determined using AMMI (Additive main effects and multiplicative interaction), GGE (Genotype main effect and genotype x environment interaction), and MTSI (Multi-trait stability index). AMMI analysis of variance showed a significant difference across environments for the three traits. The accessions were affected by environmental conditions for the three traits. The broad-sense heritability estimates were high (>0.60) for all the traits, indicating the improvement is achievable through selection. AMMI1 and AMMI2 biplots identified G10 and G13 as high seed yielding accessions adapted to environments E1, E2. The GGE biplot showed two mega-environments for TSW and three mega-environments for D50F and SY. For SY, G11 and G13 were the best accessions in the first mega-environment, G10 the best accession in the second mega-environment; G3 and G8 were the best accessions in the third mega-environment. AMMI and GGE analyses identified G10, G5, G12 as high seed yielding and stable accessions across environments. GGE biplot revealed that E1 and E2 were the most suitable environments for multi-location trials based on their discriminating ability and representativeness. MTSI indicated G10, G13, G19 as promising germplasm to be recommended for breeding progra