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RB 37 [BRA]    Theobroma cacao

 Vello, F. & Medeiros, A.G. (1965)
Expedicao botanica a Amazonica brasileira. Cacau Atualidades (Brasil) 2: pp. 47-51.

Derivation: Rio Branco.
Collected by Vello.
Location: Rio Branco, Acre, Brazil.

Bartley, 1995a [BAR95A]. Productivity - high. Flowers - generally have a "thickish" appearance with intensely and brilliantly coloured stamens such that the whole flower appears red. Fruits- small, Amelonado shaped, generally with thick husks. Seeds - small with dark cotyledons.

Notes:  Vello & Medeiros, 1965 [VEL65A] 1965 Brazilian-International expedition.

Bartley, 1998a [BAR98A] Rio Branco is the name of several rivers and the name of a town in Acre.

Bartley 1997a, [BAR97A] The original Belem planting of RB clones comprised a mixture of types. This may account for the mixtures of genotypes in the CEPEC and CATIE collections with regard to RB 48 and RB 49. Any material distributed from CATIE should be identified as such to avoid confusion with clones from the primary source, which should be considered to be the correctly identified genotypes.

Location: R. Acre, Acre, Brazil (primary forest)
Date: 8 July 1965
Coordinates: 67.50 W, 9.30 S
Material collected: Budwood
Notes: Isla Amapa
Expedition Code: 65BR
   Soria, V.J., 1965
   Vello, F. & Medeiros, A.G., 1966
   Soria, V.J., 1970
   Almeida, C.M.V.C. de et al., 1995
   Vello, F. & Medeiros, A.G., 1965

'Purus' Population
Subgroup: 'Acre R'   Reference


 Xavier Argout et al., 2023
BioProject: PRJNA880462   NCBI   ENA FASTQ 
Library Source: Genomic
Run: SRR21562157   NCBI   ENA FASTQ 
Experiment: SRX17564422
BioSample: SAMN30841508
SampleName: RB_37

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List received in 2012   Reference
• Accession: 132
   - Local Name: RB 37
List received in 1987   Reference
• Accession: 104
   - Local Name: RB 37 [BRA]
   - Year of Accession: 1966
List received in 2012   Reference
• Local Name: RB-37
   - Year of Accession: 1996
List received in 2018   Reference
• Accession: 10447
   - Local Name: RB-37

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Susceptible, 100.00 % Infection
Note: External Severety = 4.5 and Internal Severety = 4.4
 Phillips, W., 1997
Susceptible, 100.00 % Infection
Note: External Severety = 4.5 and Internal Severety = 4.4
 Phillips, W., 1996
 Fonseca, S.E.A & Albuquerque, P.S.B. de, 1996
Present (Expedition data).
 Vello, F. & Medeiros, A.G., 1966
Resistant (Field Reaction).
 Luz, E.D.M.N. & Silva, S.D.V.M., 1997
Susceptible (Seedling).
 Luz, E.D.M.N. & Silva, S.D.V.M., 1997

Seed Index: 90.9 (dried beans per 100g)
Productivity: medium

Colour Dark Purple: Present
Colour Light Purple: Absent
Colour Grey: Absent
Colour White: Absent
Colour Mottled: Absent
Number: 38.0
Maximum Number: 48
Cotyledon Wet Weight: 1.70 g
Cotyledon Dry Weight: 1.10 g
Cotyledon Length: 23.8 mm
Cotyledon Width: 12.1 mm
Cotyledon Thickness: 7.1 mm

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Rugosity: intense
Basal Constriction: very slight
Apex Form: obtuse - slightly acute
Rugosity: slight
Husk Thickness: 9.35 mm (11.3 - 7.4)
Length: 151.0 mm
Breadth: 89.0 mm
Colour: absent anthocyanin
Weight: 514.0 g
Pods Per Tree: 5
Hardness: hard
Length Breadth Ratio: 1.69
Note: ratio of distances between ridges within a pair and between ridges of two different pairs = 0.65
Shape: amelonado
Colour: green
Shape: amelonado
Size: medium

Colour: light brown

Ligule Colour: intense anthocyanin (apical)
Stamen Colour: intense anthocyanin
Sepal Colour: greyish green
Sepal Width: 2.63 mm
Sepal Length: 8.11 mm
Ligule Length: 7.21 mm
Ligule Width: 2.46 mm
Ovary Colour: anthocyanin absent (apical)
Ovary Width: 0.97 mm
Ovary Length: 1.45 mm
Style Length: 1.97 mm
Staminode Length: 7.42 mm
Pedicel Colour: pastel red
Note: Translation of Methuen colour codes.
Self Compatibility: self incompatible

Vello, F. & Medeiros, A.G. (1965) Expedicao botanica a Amazonica brasileira. Cacau Atualidades (Brasil) 2: pp. 47-51.
Soria, V.J. (1965) Notes on the cocoas collected by the Brazilian-International expedition to some areas of the Brazilian Amazon Basin. Cacao (Costa Rica) 10: pp. 10-13.
Vello, F. & Medeiros, A.G. (1966) Expedicao botanica a Amazonia Brasileira. Communicado ao Pessoal Technico No. 20. Co-ordenacao Technica. CEPLAC/CEPEC, Brazil, pp. 13.
Soria, V.J. (1970) The latest cocoa expeditions to the Amazon Basin. Cacao (Costa Rica) 15: pp. 5-15.
Almeida, C.M.V.C. de, Machado, P.F.R., de, Barriga, J.P. & Silva, F.C.O. da. (1995) Coleta da cacau (Theobroma cacao) da amazonia brasileira: uma abordagem historica e analitica. CEPLAC, SRAO, Porto Velho, RO., Brasil. pp. 92.
Motamayor, J.C., Lachenaud, P., da Silva e Mota, J.W., Loor, R., Kuhn, D.N., Brown, J.S. & Schnell, R.J. (2008) Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L). PLoS ONE 3(10): e3311. doi:10.1371/journal.pone.0003311
Xavier Argout, Gaetan Droc, Olivier Fouet, Mathieu Rouard, Karine Labadie, Bénédicte Rhoné, Gaston Rey Loor & Claire Lanaud (2023) Pangenomic exploration of Theobroma cacao: New Insights into Gene Content Diversity and Selection During Domestication. bioRxiv preprint
CEPEC (2012) Accession list for the CEPEC (Bahia, Brazil) collection. Dr. José Luis Pires, personal communication, February 2012.
Almeida, C.M.V.C. de, Barriga, J.P., Machado, P.F.R. & Bartley, B.G.D. (1987) Evolucao do programa de conservacao dos recursos geneticos de cacau na Amazonia Brasileira. CEPLAC/DEPEA, Boletim Tecnico, Belem, Brasil 5: pp.108.
Mars Center for Cocoa Science (2012) Accession list for the Mars Center for Cocoa Science. Jean-Philippe Marelli, personal communication, February 2012.
Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.
Phillips, W. (1997) Results of the artificial inoculation of Moniliophthora rorei using the Aspersion method. Unpublished data supplied by W. Phillips, CATIE, Costa Rica. Personal communication
Phillips, W. (1996) Cocoa cultivar reaction when innoculated with Moniliophthora roreri. Unpublished data supplied by W. Phillips, CATIE, Costa Rica. Personal communication
Fonseca, S.E.A & Albuquerque, P.S.B. de (1996) Avaliacao de clones de cacau na Amazonia Brasileira em relaçao a incidencia de vassoura-de bruxa. In: Proceedings of the 12th International Cocoa Research Conference, Salvador, Brazil, 1996. Cocoa Producers' Alliance.
Luz, E.D.M.N. & Silva, S.D.V.M. (1997) Evaluating resistance/tolerance to Witches' Broom disease in Bahia, Brazil. Final Report to ACRI. CEPLAC/CEPEC, February, 1997. pp. 56. Data supplied to ICGD by Luz & Silva.
Costa Rica - CATIE (1981) Genetic Resources of Cacao. A Catalogue of the CATIE Collection. J.M.M. Engels, Tropical Agricultural Research and Training Centre, CATIE, Turrialba, Costa Rica. Technical Bulletin No. 7: pp. 191.
Brazil - CEPEC (1987) List of clones in the CEPEC, Bahia, Brazil collection. Computer printout from CEPEC. Supplied by B.G.D. Bartley, CEPEC, Brazil.
Morera, J., Paredes, A. & Mora, A. (1991) Germoplasma de cacao en el CATIE entre 1947 y 1991, Programa II: Generacion y transferencia de tecnologia. IICA, San Jose, Costa Rica, pp. 49.