Resistance gradient of black pod disease in cocoa and selection by leaf disk assay

Lisboa dos Santos Elisa Susilene, Cerqueira-Silva Carlos Bernard Moreno, Clément Didier, Martins Newman Luz Edna Dora. 2011. Resistance gradient of black pod disease in cocoa and selection by leaf disk assay. Crop Breeding and Applied Biotechnology, 11 (4) : 297-303.

Quartile : Q3, Sujet : AGRONOMY / Quartile : Q4, Sujet : BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Résumé : To characterize the gradient of resistance to black pod disease experimentally, the leaf disk assay was applied to 217 cocoa genotypes. The parameters time interval, number of leaves evaluated per genotype and distribution of experimental treatments were evaluated. Significant differences between genotypes were found, resulting in the grouping in five homogenous groups (p < 0.01). In the assessments with the leaf disk test, five and seven days after inoculation, the F value was highest after seven days, clearly separating the resistant from susceptible genotypes. There was no difference between the clones behavior and the use of more than one box to group the genotypes (p = 0.56) and the use of different leaves of the same genotype (p = 0.08). The resistance gradient observed indicates variability enough for mapping and cocoa breeding in the population.

Mots-clés Agrovoc : Theobroma cacao, Phytophthora palmivora

Mots-clés géographiques Agrovoc : Bahia

Mots-clés complémentaires : Pourriture des cabosses

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Lisboa dos Santos Elisa Susilene, UESB (BRA)
• Cerqueira-Silva Carlos Bernard Moreno, UESB (BRA)
• Clément Didier, CIRAD-BIOS-UMR DAP (BRA) ORCID: 0000-0002-7602-6472
• Martins Newman Luz Edna Dora, CEPEC (BRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/562481/)

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