Publications des agents du Cirad

Cirad

Agronomic assessment of wild cocoa trees (Theobroma cacao L.) from the Camopi and Tanpok basins (French Guiana)

Lachenaud P., Oliver G., Letourmy P.. 2000. Plant Genetic Resources Newsletter (124) : p. 1-6.

A study was made of around 1600 indi­vidual cocoa trees (Theobromn cacao L.) representing 144 open-pollinated prog­enies and 11 wild populations identified in two river basins of French Guiana, based on the following selection criteria: juvenile growth (or vigour), adult vigour, the yield:vigour ratio, earliness of production, yield, average pod weight and losses due to rot in the field. Obser­vations were carried out at CIRAD's Sinnamary station in French Guiana over a total of 10 years. The analysis of vari­ance carried out on the seven most nu­merous populations (amounting to 97% of the individuals) revealed population and/ or progeny effects for all the crite­ria. It is proposed that the study material be incorporated into genetic improve­ment programmes, particularly for yield, the yield:vigour ratio and performance in the field with respect to rot diseases. To that end, practical indications are given to breeders for choosing from the populations and progenies.

Mots-clés : phytophthora; résistance aux maladies; productivité; vigueur; croissance; caractère agronomique; caractéristique du peuplement; amélioration des plantes; critère de sélection; variété indigène; plante sauvage; theobroma cacao; guyane française

Thématique : Génétique et amélioration des plantes; Culture des plantes; Maladies des plantes

Documents associés

Article de revue

Agents Cirad, auteurs de cette publication :