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RB 39 [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


 Cornejo, O.E. et al., 2018
BioProject: PRJNA486011   NCBI   ENA FASTQ 
Project: PRJEB28591   EVA (project)   EVA (analysis) 
Library Source: Genomic
Run: SRR7774167   NCBI   ENA FASTQ 
Experiment: SRX4629657
BioSample: SAMN09934533
SampleName: RB39PL1
SampleSource: Costa Rica, Tree_ID: Tc02522

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List received in 2012   Reference
• Accession: 134
   - Local Name: RB 39
List received in 1987   Reference
• Accession: 106
   - Local Name: RB 39 [BRA]
   - Year of Accession: 1966
List received in 2015   Reference
• Accession: RB 39 Quadra 1
   - Local Name: RB 39
List received in 2012   Reference
• Local Name: RB-39
   - Year of Accession: 1996
List received in 2018   Reference
• Accession: 10448
   - Local Name: RB-39
List received in 2012   Reference
• Local Name: RB39
   - Year of Accession: 1973
List received in 2008   Reference
• Accession: VTLC 143
   - Local Name: RB-39
List received in 2008   Reference
• Accession: IDN-13-TCAC-00678
   - Local Name: RB 39 (BRA)
List received in 2012   Reference
• Local Name: RB 39
   - Year of Accession: 1991

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Susceptible (Branch).
Note: Based on mycelium growth and the production of perithecia..
 Stela Dalva Vieira Midlej Silva, 2003
Absent (Expedition data).
 Vello, F. & Medeiros, A.G., 1966
Intermediate (Seedling).
 Luz, E.D.M.N. & Silva, S.D.V.M., 1997
Resistant (Field Reaction).
 Monteiro, W.R. & Silva, S.D.V.M., 1998
Resistant (Field Reaction).
 Luz, E.D.M.N. & Silva, S.D.V.M., 1997
 Pires, J.L. et al., 1996

Pod Index: 34.5 (pods per kg dried beans)
Seed Index: 112.3 (dried beans per 100g)
Productivity: very low

Colour: dark purple
Shape: elliptical
Number: 42.0
Total Wet Weight: 42.0 g
Cotyledon Dry Weight: 0.69 g
Cotyledon Length: 19.4 mm
Cotyledon Width: 10.6 mm
Colour Dark Purple: Absent
Colour Light Purple: Present
Colour Grey: Absent
Colour White: Present
Colour Mottled: Absent
Number: 38.6
Maximum Number: 50
Cotyledon Wet Weight: 1.31 g
Cotyledon Dry Weight: 0.89 g
Cotyledon Length: 22.0 mm
Cotyledon Width: 10.9 mm
Cotyledon Thickness: 7.8 mm

Testa: 4.70 %

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Shape: oblong
Basal Constriction: slight
Apex Form: indented
Rugosity: slight
Length: 141.0 mm
Breadth: 73.0 mm
Colour: anthocyanin absent
Rugosity: moderate
Basal Constriction: very slight
Apex Form: obtuse
Rugosity: slight
Husk Thickness: 9.3 mm (11.4 - 7.2)
Length: 158.0 mm
Breadth: 85.0 mm
Colour: absent anthocyanin
Weight: 454.0 g
Pods Per Tree: 1
Hardness: moderate
Length Breadth Ratio: 1.85
Note: ratio of distances between ridges within a pair and between ridges of two different pairs = 0.80
Shape: amelonado
Colour: green
Shape: amelonado
Rugosity: smooth
Husk Thickness: thin

Colour: moderate anthocyanin
Colour: reddish brown

Ligule Colour: intense anthocyanin
Stamen Colour: intense anthocyanin
Sepal Length: 6.78 mm
Ligule Width: 2.09 mm
Ovule Number: 46
Style Length: 1.89 mm
Pedicel Colour: red
Ligule Colour: slight anthocyanin (apical)
Stamen Colour: intense anthocyanin
Sepal Colour: greyish green
Sepal Width: 2.53 mm
Sepal Length: 7.38 mm
Ligule Length: 6.37 mm
Ligule Width: 2.59 mm
Ovary Colour: anthocyanin absent (apical)
Ovary Width: 1.07 mm
Ovary Length: 1.50 mm
Style Length: 1.90 mm
Staminode Length: 7.84 mm
Pedicel Colour: greyish pink
Note: Translation of Methuen colour codes.

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
Cornejo, O.E., Muh-Ching Yee, Victor Dominguez, Mary Andrews, Alexandra Sockell, Erika Strandberg, Donald Livingstone III, Conrad Stack, Alberto Romero, Pathmanathan Umaharan, Stefan Royaert, Nilesh R. Tawari, Pauline Ng, Osman Gutierrez, Wilbert Phillips, Keithanne Mockaitis, Carlos D. Bustamante & Juan C. Motamayor (2018) Population genomic analyses of the chocolate tree, Theobroma cacao L., provide insights into its domestication process. Commun Biol 1, 167
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.
Almeida, Caio Márcio Vasconcellos Cordeiro de, Francisco Antônio Neto, Acácio de Paula, Silva, José Raymundo Pires Medeiros & Antonio de Almeida Lima (2015) RECURSOS GENÉTICOS DE CACAUEIRO EM RONDÔNIA: RETROSPECTIVA HISTÓRICA, ORIGEM E INVENTÁRIO [Genetic Resources of Cacao in Rondônia: Historical Overview, Origin and Inventory]. Agrotrópica (Itabuna) 27 (2): 93–124
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.
CRIG (2012) Cocoa accessions held in the Cocoa Research Institute of Ghana (CRIG). Francis Kwame Padi, personal communication, February 2012.
CPCRI (2008) Cocoa germplasm maintained at the Central Plantation Crops Research Institute (CPCRI) Regional Station, Vittal, India. Data supplied to ICGD by email. D. Balasimha, CPCRI Vittal, India, July 2008.
Susilo, A. (2008) The list of germplasm collected by ICCRI. Personal communication from Agung Susilo, July 2008.
Philippe Bastide. (2012) Les clones suivis au Vanuatu (unpublished list of accessions). Personal communication, February 2012.
Stela Dalva Vieira Midlej Silva (2003) Ensaios Para Avaliação do Cacaueiro à Murcha-de-Ceratocystis na Bahia, Brasil. In: Proceedings of the 14th International Cocoa Research Conference, Accra, Ghana (October 2003). Cocoa Producers' Alliance, Lagos, Nigeria.
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.
Monteiro, W.R. & Silva, S.D.V.M. (1998) Individual Institute Reports - Brazil, CEPEC. Report on the IPGRI project: Cocoa Germplasm Utilisation and Conservation, A Global Approach. Appendix to General Progress Report of Year 1.
Pires, J.L., Monteiro, W.R., Pinto, L.R.M. & Luz, E.D.M.N. (1996) Resistance to Witches Broom - Evaluation of genotypes from different origins. In: Proceedings of the 12th International Cocoa Research Conference, Salvador, Brasil 1996 Cocoa Producers' Alliance (in press).
Frances Bekele & Gillian Bidaisee (2022) Morphological data from the International Cocoa Collection (ICG,T) maintained by the Cocoa Research Centre (CRC), Trinidad & Tobago. Unpublished data on fruit, bean, flower and flush morphology supplied as an Excel spreadsheet by Frances Bekele. Last update March 2022.
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.