Abstract

GAMBOA-TABARES,, JEAN-ALEXÁNDER et al. Agronomic evaluation of Theobroma cacao L. genotypes in the colombian Amazon. Rev.Bio.Agro [online]. 2021, vol.19, n.1, pp.244-255. ISSN 1692-3561.  https://doi.org/10.18684/bsaa(19)244-255.

The universal clones of cocoa (Theobroma cacaoL.) introduced in the Colombian Amazon region, present low yields. The objective of this work was to evaluate the agronomic behavior of promissory local genotypes of T. cacao under the conditions of the Colombian Amazon. The nursery and experimental plot were established on the rural division of Cuba in Cartagena del Chairá town. A 7 x 4 Factorial Experiment was implemented, with Factor A (genotypes) and Factor B (planting distances). In the nursery, height and stem diameter of the IMC-67 rootstock clone were evaluated, and in the experimental plot the agronomic yield and performance of seven genotypes. IMC-67 clone had 95% of survival, a growth rate of 0,200 cm.day-1, and an increase in stem diameter of 0,003 cm.day-1The seven genotypes showed 95,73% of survival, without statistically significant differences (p<0,05). The total height (cm), graft length (cm), rootstock diameter (cm), number of leaves and treetop area (m2), showed statistically significant differences (p<0,0001). RMC-4 genotype showed higher biomass values followed by the RMC-2 and ICS-1 genotypes, without statistically significant differences (p<0,05), among the genotypes evaluated. We concluded that the RMC-3, RMC-4 and RMC-5, present potential for consolidation as universal clones in the future.

Keywords : Cocoa; Agroforestry; Development; Characterization; Theobroma cacao L.

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