Wibaux Thomas, Konan Dany-Claude, Snoeck Didier, Jagoret Patrick, Bastide Philippe. 2018. Study of tree-to-tree yield variability among seedling-based cacao populations in an industrial plantation in côte d'ivoire. Experimental Agriculture, 54 (5) : 719-730.
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Quartile : Q1, Sujet : AGRONOMY
Résumé : In Côte d'Ivoire, the world's largest cocoa producer, cacao (Theobroma cacao L.) is usually grown from seed. The genetics consist of a mix of amelonado, trinitario and selected hybrids. This mix of varieties generates high phenotypic variabilities, including variability in tree productivity, within cacao populations in both smallholder and industrial plantations. Tree-to-tree variability in yield has been reported in cacao breeding trials under different environmental conditions. However, it has never been considered a limiting factor for agronomical performance of seedling-based cacao plantations. Around 10 000 cacao trees from seven plots under different environmental conditions in a cacao plantation in Côte d'Ivoire were monitored for 2 years. Pod production of individual trees was recorded and annual average tree pod yields were assessed. High heterogeneity in cacao-tree yields was observed in all plots, with coefficients of variation ranging from 56 to 102%. The distribution of cacao-tree yields in each plot was positively skewed. Analysis of these distributions showed that unproductive trees represented a significant proportion of cacao tree populations (7%), and the 20% least productive trees accounted for 3% of production. The 20% most productive trees were responsible for 46% of the total pod production of a plot. This heterogeneity reflects a major imbalance in the agronomical performances of low- and high-yielding trees and also represents possible efficiency gaps in seedling-based cacao plantations, which could be overcome through innovative corrective strategies, opening new pathways for improvement of cacao-based cropping systems.
Mots-clés Agrovoc : Theobroma cacao, culture de rapport, productivité, rendement des cultures, sélection artificielle, sélection individuelle, hybridation, phénotype, plant
Mots-clés géographiques Agrovoc : Côte d'Ivoire
Mots-clés libres : Cacao, Côte d'Ivoire, Cacao seedlings, Yield variability, Yield distribution, Sustainable intensification
Classification Agris : F01 - Culture des plantes
F30 - Génétique et amélioration des plantes
Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive
Auteurs et affiliations
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Wibaux Thomas, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
ORCID: 0009-0002-8761-834X - auteur correspondant
- Konan Dany-Claude, Société Agricole du Bandama (CIV)
- Snoeck Didier, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
- Jagoret Patrick, CIRAD-PERSYST-UMR SYSTEM (FRA)
- Bastide Philippe, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
Source : Cirad-Agritrop (https://agritrop.cirad.fr/585117/)
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