Yield stability in Coffea canephora from diallel mating designs monitored for 14 years

Cilas Christian, Bouharmont Pierre, Bar-Hen Avner. 2003. Yield stability in Coffea canephora from diallel mating designs monitored for 14 years. Heredity, 91 (5) : 528-532.

Autre titre : Stabilité du rendement chez des Coffea canephora d'essais de croisements diallèles suivis pendant 14 ans

Résumé : The genetic parameters of several agronomic traits were estimated in #Coffea canephora# in a triangular diallel with six parents and in a partial diallel with 18 parents. The yield data came from harvests obtained over 14 years divided into an initial 6-year cycle, a second cycle of 5 years after cutting back and a third cycle of 3 years after topping. Risk incidence was also observed over several years. The general combining abilities (GCA) were the principal sources of variation for the various traits considered. Parents derived from the Yangambi selections (Democratic Republic of Congo) proved to be best for yields in the three cropping cycles. The rank correlations between the GCA of the various traits indicated that first-cycle production was still not enough to predict the GCA for yield over 14 years. Susceptibility to leaf anthracnose and to drought could lead to modifications in successive classifications, with a more significant impact on production during the first cycle. The differences in susceptibility to Coffee Berry Borers had an impact on yield, which increased in line with coffee tree age. There was a rather good relation between inherent values and values in parent combinations and it was thus possible to choose parents on their own performance.

Mots-clés Agrovoc : Coffea canephora, rendement des cultures, croisement, analyse diallèle, aptitude à la combinaison, résistance aux maladies, résistance à la sécheresse, résistance aux organismes nuisibles

Classification Agris : F30 - Génétique et amélioration des plantes
U10 - Informatique, mathématiques et statistiques
F01 - Culture des plantes

Auteurs et affiliations

• Cilas Christian, CIRAD-CP-CACAO (FRA)
• Bouharmont Pierre
• Bar-Hen Avner, Université Paul Cézanne (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/516879/)

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