Advancing breeding for climate-resilient yam production in Côte d'Ivoire

Kouakou Amani Michel, Chaïr Hanâ, Dibi Konan Evrard Brice, Dossa Komivi, Arnau Gemma, Ehounou Adou Emmanuel, Cornet Denis. 2023. Advancing breeding for climate-resilient yam production in Côte d'Ivoire. Plants, People, Planet, 12 p.

https://doi.org/10.1002/ppp3.10459

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Résumé : Societal Impact Statement Yam plays an important role in ensuring food security in Côte d'Ivoire, serving as a staple crop for 60% of the population and a significant source of income. It holds deep cultural significance for the Akan and Gour ethnic groups. Preserving yam production is essential for both food security and the preservation of cultural heritage. However, productivity is decreasing while demand is expected to double in the next 30 years. Soil degradation and climate change are major threats to yam production. This article contextualizes the main factors threatening yam production (i.e., soil degradation and climate change) and discusses the consequences and ways to mitigate them. Summary The anticipated twofold increase in Côte d'Ivoire's population within the next three decades poses a significant challenge for agricultural research to sustain food security. Despite being an under-researched and often neglected crop, yam remains the primary staple food and a crucial source of income in the country. With an annual estimated market value of over 2000 billion CFA francs, yam ranks among the top five most economically valuable crops in Côte d'Ivoire. For the past 15 years, yam production has experienced a decline in productivity, which has been compensated for by expanding the cropped area. Unfortunately, this approach exacerbates the risk of deforestation and soil degradation. Additionally, the impact of climate change on yam production, coupled with a lack of financial resources to address it, has rendered this unsustainable mode of production even more precarious. The purpose of this study is to provide an overview of the effects of climate change on yam production in Côte d'Ivoire. We investigated the reasons for the productivity decline and described the risks on food security. Furthermore, we explained how varietal innovation of Dioscorea alata could play a critical role in mitigating these effects and outlined related research avenues that need to be explored. To help policymakers and research programme directors justify the importance of this agenda, this article presents the main arguments in favour of a substantial investment in adapting yam production to the global changes affecting Côte d'Ivoire.

Mots-clés Agrovoc : changement climatique, sécurité alimentaire, igname, Dioscorea, plante alimentaire, adaptation aux changements climatiques, déboisement, amélioration des plantes, résistance à la sécheresse, Dioscorea alata, variété, agriculture durable