Genetic diversity of selected cocoa (Theobroma cacao L.) in farmers' fields in Côte-d'Ivoire

Pokou N. Desiré, N'Goran Jeanne A.K., Eskes Albertus, Motamayor Juan Carlos, Schnell Raymond J., Kolesnikova-Allen Maria, Sangaré A.. 2009. Genetic diversity of selected cocoa (Theobroma cacao L.) in farmers' fields in Côte-d'Ivoire. In : Proceedings of the international workshop on cocoa breeding for farmers' needs, 15th - 17th October 2006, San José, Costa Rica. Eskes Albertus (ed.), Efron Yoel (ed.), End M.J. (ed.), Bekele Frances L. (ed.). INGENIC, CATIE. Reading : INGENIC, 53-60. ISBN 1-900527-04-9 International Workshop on Cocoa Breeding for Farmers¿ Needs. 5, San José, Costa Rica, 15 Octobre 2006/17 Octobre 2006.

Résumé : In six producing regions of Côte-d'Ivoire (Abengourou, Aboisso, Divo, Gagnoa Daloa, Soubré), 280 farms were visited. Based on the farmers' knowledge of their planting materials, individual trees were selected which were promising for high yield potential, with low pest infestation (mirids) or with low Phytophthora pod rot incidence. Open pollinated seed progenies were collected from 561 trees. One seedling from each of these accessions was used to study the genetic diversity with 12 microsatellite markers. Parental clones from seed-gardens in Côte-d'Ivoire and African founder genotypes were used as control populations. The farm accessions revealed high within-region and low between-region diversity. Most of the farm accessions appeared to be hybrids between Upper Amazon (UA) and Lower Amazon (LA, Amelonado) or African Trinitario parental genotypes. However, a certain percentage of accessions appeared to be fairly pure UA or LA types. The best accessions for black pod resistance appear to be mostly hybrids between Upper Amazon and Amelonado.

Mots-clés Agrovoc : Theobroma cacao, variation génétique, Phytophthora

Mots-clés géographiques Agrovoc : Côte d'Ivoire

Classification Agris : F30 - Génétique et amélioration des plantes
U30 - Méthodes de recherche
E50 - Sociologie rurale

Auteurs et affiliations

• Pokou N. Desiré, CNRA (CIV)
• N'Goran Jeanne A.K., CNRA (CIV)
• Eskes Albertus, CIRAD-CP-UPR Bioagresseurs de pérennes (FRA)
• Motamayor Juan Carlos, USDA (USA)
• Schnell Raymond J., USDA (USA)
• Kolesnikova-Allen Maria, IITA (NGA)
• Sangaré A., CNRA (CIV)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/557889/)

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