Location: R. Oyapock, Haut Oyapock, French Guiana (primary forest)

Date: April 1995

Coordinates: 52.37 W, 2.26 N

Material collected: Seed

Notes: Mongou Eutou Falls to Assikaloutou creek, left bank

Expedition Code: 95GU

   Trinidad - CRU, 1995

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Reference

Trinidad - CRU 1995

Cocoa Research Unit. Report for 1995. The University of the West Indies.

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   Lachenaud, P. et al., 1997

×

Reference

Lachenaud, P., Mooleedhar, V. & Couturier, C. 1997

Les cacaoyers spontanes de Guyane, nouvelles prospections. Plantations, Recherche, Developpment, Janvier-Fevrier, pp. 25-32.

Notes

French Guiana - CIRAD/CRU, Haut Oyapock, Rivers Euleupousing, Yaloupi and Oyapock. Datafile: OYA___DC GUF - CIRAD/CRU Expedition Field Data Germplasm: Descriptions of 41 ELP, 4 OYA and 8 YAL] accessions made at the time of collection from the French Guianan Haut Oyapock region. Descriptors: Characteristics of trees in the field: height, canopy size, branch number, presence of disease. Fruit form: the "Guianan" pod shape is described as midway between the Amelonado and the Angoleta, quite similar to pods from the Rio Ica (in Brazil and Putumayo in Peru), an upper Amazon tributary. No specification in this field represents deformity.

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 Fruit

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 Parents:

OYA 2  x Unknown

 Guiltinan, Mark, 2019

'Guiana' Population

 Reference

×

Reference

Guiltinan, Mark 2019

Theobroma cacao Disease Resistance: Discovery and Functional Characterization of Genes Regulating Plant Immunity in Perennial Crops. NCBI

Notes

A project to establish a new scientific approach for use with perennial crop plants to identify candidate loci for disease resistance using Theobroma cacao. Leaf samples were collected from the La Montaña field site at the CATIE field station in Turrialba, Costa Rica. The study focused on four genetic groups (Guiana, Iquitos, Marañon, and Nanay) and variation in resistance to Phytophthora.

Last updated: November, 2022

 plantscience.psu.edu/…

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 Disease  Population  Accession Data  Project Data

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 Phytophthora

Resistant

 Guiltinan, Mark, 2019

×

Reference

Guiltinan, Mark 2019

Theobroma cacao Disease Resistance: Discovery and Functional Characterization of Genes Regulating Plant Immunity in Perennial Crops. NCBI

Notes

A project to establish a new scientific approach for use with perennial crop plants to identify candidate loci for disease resistance using Theobroma cacao. Leaf samples were collected from the La Montaña field site at the CATIE field station in Turrialba, Costa Rica. The study focused on four genetic groups (Guiana, Iquitos, Marañon, and Nanay) and variation in resistance to Phytophthora.

Last updated: November, 2022

 plantscience.psu.edu/…

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 Disease  Population  Accession Data  Project Data

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Susceptible, sp. P. megakarya (Leaf Disc Test).

Note: Described as Very Susceptible. Mean of lesion score = 3.73. Population Oyapok

 Paulin, D. et al., 2008

×

Reference

Paulin, D., Ducamp, M. & Lachenaud, P. 2008

New sources of resistance to Phytophthora megakarya identified in wild cocoa tree populations of French Guiana. Crop Protection. 27: pp 1143–1147.

Notes

Phytophthora megakarya inoculation used strain NS269 isolated from a pod harvested in West Province, Cameroon (village of Fako). This strain is of mating type A1.

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 Disease

Close

Trinidad - CRU (1995) Cocoa Research Unit. Report for 1995. The University of the West Indies.

Lachenaud, P., Mooleedhar, V. & Couturier, C. (1997) Les cacaoyers spontanes de Guyane, nouvelles prospections. Plantations, Recherche, Developpment, Janvier-Fevrier, pp. 25-32.

Guiltinan, Mark (2019) Theobroma cacao Disease Resistance: Discovery and Functional Characterization of Genes Regulating Plant Immunity in Perennial Crops. NCBI

Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.

Philippe Lachenaud (2012) CIRAD Montpellier Clone List (Excel Spreadsheet). Data supplied to ICGD by email. Dr. Philippe Lachenaud, CIRAD Montpellier, France, January 2012.

Philippe Lachenaud (2012) F. Guiana database, CIRAD-CP. Data supplied to ICGD by email. Dr. Philippe Lachenaud, CIRAD Montpellier, France, January 2012.

Paulin, D., Ducamp, M. & Lachenaud, P. (2008) New sources of resistance to Phytophthora megakarya identified in wild cocoa tree populations of French Guiana. Crop Protection. 27: pp 1143–1147.