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RB 41 [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. Branco, Acre, Brazil (primary forest)
Date: 10 July 1965
Coordinates: 67.49 W, 9.59 S
Material collected: Budwood
Notes: Chico Pedro, 9km from R.Branco city
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: SRR21562156   NCBI   ENA FASTQ 
Experiment: SRX17564423
BioSample: SAMN30841509
SampleName: RB_41

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List received in 2012   Reference
• Accession: 136
   - Local Name: RB 41
List received in 1987   Reference
• Accession: 108
   - Local Name: RB 41 [BRA]
   - Year of Accession: 1966
List received in 2018   Reference
• Accession: 10450
   - Local Name: RB-41
List received in 2012   Reference
• Local Name: RB41
   - Year of Accession: 1982
List received in 1994   Reference
• Local Name: RB 41 [BRA]
List received in 1990   Reference
• Local Name: RB 41 [BRA]
List received in 1995   Reference
• Local Name: RB 41 [BRA]
   - Year of Accession: 1987

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77.00 % Infection (Field reaction).
Note: Natural incidence of the disease over 9 years.
 Wilbert Phillips et al., 2009
Susceptible, 100.00 % Infection
Note: External Severety = 4.4 and Internal Severety = 4.7
 Phillips, W., 1996
Susceptible, 100.00 % Infection
Note: External Severety = 4.4 and Internal Severety = 4.7
 Phillips, W., 1997
0.30 % Infection, sp. P. palmivora (Field reaction).
Note: Natural incidence of the disease over 3 years.
 Wilbert Phillips et al., 2009
Moderate Resistance, sp. P. palmivora (Pod).
 Phillips, W., 1997
Resistant, sp. P. palmivora (Pod).
Note: Unripe, Attached and not wounded
 Morera, J., 1993
Resistant, 39.00 % Infection, sp. P. palmivora (Pod).
Note: Unripe and not wounded
 Lopez-Baez, O. et al., 1996
Absent (Expedition data).
 Vello, F. & Medeiros, A.G., 1966

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Seed Index: 111.1 (dried beans per 100g)
Pod Index: 40.9 (pods per kg dried beans)
Seed Index: 113.6 (dried beans per 100g)
Pod Index: 41.6 (pods per kg dried beans)
Seed Index: 144.9 (dried beans per 100g)
Productivity: high
Yield: 243 kg ha-1 yr-1
Note: 3 year mean
Productivity: high
Note: expedition data

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Number: 27.1
Total Dry Weight: 24.0 g
Dry Weight: 0.88 g
Note: 21 plants sampled
Number: 27.2
Total Dry Weight: 24.5 g
Dry Weight: 0.90 g
Colour Dark Purple: Absent
Colour Light Purple: Present
Colour Grey: Absent
Colour White: Absent
Colour Mottled: Absent
Number: 30.5
Maximum Number: 48
Cotyledon Wet Weight: 1.19 g
Cotyledon Dry Weight: 0.69 g
Cotyledon Length: 21.3 mm
Cotyledon Width: 11.0 mm
Cotyledon Thickness: 7.8 mm

Butterfat Content: 59.70 %
Note: 5 plants sampled

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Rugosity: intense
Basal Constriction: very slight
Apex Form: slightly acute
Rugosity: moderate
Husk Thickness: 7.8 mm (10.3 - 5.3)
Length: 168.0 mm
Breadth: 72.0 mm
Colour: absent anthocyanin
Weight: 326.0 g
Pods Per Tree: 7
Hardness: moderate
Length Breadth Ratio: 2.33
Note: ratio of distances between ridges within a pair and between ridges of two different pairs = 0.71
Shape: amelonado
Colour: green
Shape: amelonado
Size: small

Colour: light brown

Ligule Colour: intense anthocyanin (apical)
Stamen Colour: anthocyanin absent
Sepal Colour: greyish green
Sepal Width: 2.05 mm
Sepal Length: 6.51 mm
Ligule Length: 5.94 mm
Ligule Width: 1.96 mm
Ovary Colour: anthocyanin absent (apical)
Ovary Width: 1.01 mm
Ovary Length: 1.31 mm
Style Length: 1.74 mm
Staminode Length: 6.29 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.
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.
Honduras - CEDEC (1994) List of accessions in CEDEC, La Masica, Honduras. J.A. Sanchez, FHIA, Honduras. Personal Communication.
Malaysia - ARC Tuaran (1990) List of clones held in the Dept. of Agriculture's collection, at Sabah, Tuaran, Malaysia. E.B. Tay, Malaysian Cocoa Board, Malaysia. Personal Communication.
Lopez-Baez, O., Cueto-Moreno, J. & Fraire-Vazquez, G. (1995) Progressos en el mejoramiento genetico del cacao Theobroma cacao L. en Mexico. In: Proceedings of the International Workshop on Cocoa Breeding Strategies, Kuala Lumpur, 1994. INGENIC, Reading, U.K. pp. 18-25.
Wilbert Phillips, José Castillo, Adriana Arciniegas, Allan Mata, Aldo Sánchez, Mariela Leandro, Carlos Astorga, Juan Motamayor, Bill Guyton, Ed Seguine & Ray Schnell (2009) Overcoming the Main Limiting Factors of Cacao Production in Central America through the use of Improved Clones Developed at CATIE. In: Proceedings of the 16th International Cocoa Research Conference, Bali, Indonesia (November 2009). Cocoa Producers' Alliance, Lagos, Nigeria.
Phillips, W. (1996) Cocoa cultivar reaction when innoculated with Moniliophthora roreri. Unpublished data supplied by W. Phillips, CATIE, Costa Rica. 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. (1997) Results of the artificial inoculation of Phytophthora palmivora using the Paper Disc method. Unpublished data supplied by W. Phillips, CATIE, Costa Rica. Personal communication
Morera, J. (1993) Reaction of clones to Phytophthora palmivora. J. Morera, CATIE, Costa Rica. Personal Communication.
Lopez-Baez, O., Fraire, V.G. & Cueto, M.J. (1996) Mejoramiento genetico para la resistencia a Phytophthora en Mexico. Proceedings of the International Workshop on the Contribution of Disease Resistance to Cocoa Variety Improvement, INGENIC, Salvador, 24th-26th September, 1996. pp.51-55.
Malaysia - BAL Plantations (1991) Results from cocoa butter content determinations using Nuclear Magnetic Resonance (NMR) analysis. G. Lockwood, CDC, U.K. Personal Communication.
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.