Guiana Cacao (Theobroma cacao ‘Guiana’)

Wild Guiana Cacao

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Plant palette

Theobroma cacao 'Guiana' - Wild Cacao Variety

Discovered in 1729 in the understory of French Guiana, Theobroma cacao 'Guiana' forms one of the ten fundamental genetic groups of the cacao tree. This population survived in isolated forest refugia during Quaternary climatic fluctuations, resulting in a unique evolutionary trajectory.

Modern genetic analysis confirms its distinct status, separating it from the traditional Criollo, Forastero, and Trinitario classifications. It serves as a vital resource for studying the evolutionary history of wild cacao populations.

Taxonomy

∟ царство Plantae
∟ division Tracheophytes (Vascular Plants)
∟ subdivision Spermatophytes (Seed plants)
∟ Angiosperms
∟ mesangiosperms (Core angiosperms)
∟ eudicots
∟ Superrosids
∟ rosids
∟ malvids
∟ order Malvales
∟ family Malvaceae
∟ subfamily Byttnerioideae
∟ genus Theobroma (Cacao trees)
∟ species Theobroma cacao (Cacao Tree)
∟ cultivar Theobroma cacao ‘Guiana’ (Guiana Cacao)

Morphology

This evergreen understory tree can reach an impressive height of up to 25 meters in its natural habitat. The foliage consists of large, persistent leaves that capture filtered sunlight beneath the dense forest canopy.

The fruit pods, commonly known as cabosses, display distinctive morphological features:

Deeply marked furrows running longitudinally along the outer surface of the pod.
Warty bumps (verrucosités) that cover the rind, creating a rough texture.
Elongated shape containing rows of seeds embedded in a sweet mucilaginous pulp.

Applications

This wild genetic group plays a crucial role in modern cacao breeding programs. Agronomists value these trees for their potential to introduce desirable traits into cultivated varieties.

Key applications in agricultural research include:

Disease resistance to combat common tropical pathogens affecting commercial plantations.
Genetic diversification to strengthen the gene pool of cultivated cacao crops.
Organoleptic enhancement due to the superior flavor profile characteristic of these wild populations.

Interesting facts

French military expeditions along the border with Brazil helped collect the first specimens of this cacao for scientific study in 1985. The original discovery, however, dates back to a French sergeant who encountered the trees while searching for the legendary city of Eldorado.

The botanical station at Pointe-Combi in Sinnamary maintains a living collection of these unique trees. Researchers preserve nearly two hundred mother-trees representing distinct river basin populations.

Geography of distribution

French Guiana

Sources

POWO: Plants of the World Online (Royal Botanic Gardens, Kew)
GBIF: Global Biodiversity Information Facility
WFO: World Flora Online

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Guiana Cacao (Theobroma cacao ‘Guiana’)