Cocoa breeding must take into account the competitive value of cocoa trees

Autor: Fabienne Ribeyre, Facundo Muñoz, Christian Cilas, Leopoldo Sanchez, Caudou Inago Trebissou, Mathias Gnion Tahi, Simon-Pierre A. N’guetta
Přispěvatelé: Centre National de la Recherche Agronomique - CNRA (IVORY COAST), Université Félix Houphouët-Boigny (UFHB), Animal, Santé, Territoires, Risques et Ecosystèmes (UMR ASTRE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Biologie intégrée pour la valorisation de la diversité des Arbres et de la Forêt (BioForA), Office National des Forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Direction Générale Déléguée à la Recherche et à la Stratégie (Cirad-Dgdrs), Plant Health Institute of Montpellier (UMR PHIM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Office national des forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de Montpellier (UM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
0106 biological sciences
Perennial plant
Theobroma
Plant Science
Compétition intraspécifique
01 natural sciences
F30 - Génétique et amélioration des plantes
Agricultural science
[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture
forestry
[STAT.ML]Statistics [stat]/Machine Learning [stat.ML]
F01 - Culture des plantes
[MATH]Mathematics [math]
ComputingMilieux_MISCELLANEOUS
media_common
2. Zero hunger
Within-species interaction
04 agricultural and veterinary sciences
BreedR
[SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM]
Cacao breeding
Rendement des cultures
Génotype
Yield
media_common.quotation_subject
Yield (finance)
[SDE.MCG]Environmental Sciences/Global Changes
Soil Science
[SDV.BID]Life Sciences [q-bio]/Biodiversity
Biology
Competition (biology)
[SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics
Production (economics)
Ecosystem
Theobroma cacao
Perennial crop
amélioration génétique
[SDV.GEN]Life Sciences [q-bio]/Genetics
[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE]
Mating design
15. Life on land
biology.organism_classification
Amélioration des plantes
[SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy
[SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding
Group selection
Agronomy
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
Multivariate model
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Agronomy and Crop Science
010606 plant biology & botany
Zdroj: European Journal of Agronomy
European Journal of Agronomy, 2021, 128, ⟨10.1016/j.eja.2021.126288⟩
European Journal of Agronomy, 2021, 128, pp.126288. ⟨10.1016/j.eja.2021.126288⟩
ISSN: 1161-0301
DOI: 10.1016/j.eja.2021.126288⟩
Popis: International audience; Interactions between neighbouring plants in an ecosystem can lead to competition, even in single-species stands. Genetic selection of perennial plants based on the individual values of genotypes does not usually take into account interactions that develop over time. The purpose of this study was to ascertain whether the effects of competition might affect the performance of cacao genotypes tested over long periods, and at what point those effects begin. Competition was studied on cacao trees (Theobroma cacao L) taking into account the diameter of the trees and their yields. The trial design set up in Côte d'Ivoire was a factorial mating design of the main cacao genetic improvement programme. The approach taken was a multivariate model based on 13 years of data gathering, including genetic, spatial and competition effects. The results revealed a gradual onset of competition starting in the early years of production up to the 4 th year, when its effect became significant. It first affected growth then, 2 years later, yields. Depending on the production years, the genetic effect and the spatial effect were the greatest. In years of strong competition, it could affect up to 10 % of the annual production variability, i.e. a quarter of the variability explained by genetics. The most vigorous trees always remained highly competitive and high-yielding. The competition effect will therefore always be substantial with selections of high-yielding individuals. "Group selection" of somewhat average, less competitive individuals would help to maximize yield gains through the combined performance of the group, rather than that of individual trees.
Databáze: OpenAIRE
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