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RIM 52 [MEX]    Theobroma cacao

 Hunter, J.R. (1961)
The status of cacao variety improvement work in the Western Hemisphere. Cacao (Costa Rica) 4: pp. 1-16.

Derivation: Rosario Izapa Mexico.
Collected by del Arco & Spencer.
Location: Tuxclachico, Chiapas, Mexico.

Hunter, 1961a [HUN61A]. Fruit - Long, thin Soconusco type. Seed - white. Bartley, 1997a [BAR97A]. Most of the genotypes are very similar with regard to their vegetative and floral characteristics. The fruit shapes also show very little variation as do most other fruit characteristics. Most of these genotypes have fruit with a light green colour and the others have some degree of anthocyanin pigmentation.

Notes:  Hunter, 1961 [HUN61A] Selections from Hda La Rioja. Selections from the Pacific coast with some MATINA genes.

In the original format of the name was composed of a number with "R" or "RIM" as suffix to that.
 

Synonyms: BLZ 52 /R [MEX], R 52 [MEX]

 HELD IN

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List received in 2012   Reference
• Accession: 334
   - Local Name: RIM 52
   - Year of Accession: 1980
• Accession: 334
   - Local Name: RIM 52
   - Year of Accession: 1981
List received in 2015   Reference
• Accession: RIM 52 Quadra 5
   - Local Name: RIM 52
List received in 2018   Reference
• Accession: 10432
   - Local Name: RIM-52
   - Year of Accession: 1958
 Dominican Republic, Comision del Cacao
List received in 1987   Reference
• Local Name: RIM 52 [MEX]
   - Year of Accession: 1974
List received in 2011   Reference
• Local Name: R-52
List received in 1990   Reference
• Local Name: R 52 [MEX]
List received in 1992   Reference
• Local Name: RIM 52 [MEX]
   - Year of Accession: 1945
List received in 2016   Reference
• Accession: PI 243024     GRIN-Global 
   - Local Name: RIM 52 [MEX]
   - Year of Accession: 1961
List received in 1972   Reference
• Local Name: R 52 [MEX]

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Susceptible, 96.00 % Infection
Note: External Severety = 4.4 and Internal Severety = 4.6
 Phillips, W., 1996
Susceptible, 100.00 % Infection
Note: External Severety = 4.4 and Internal Severety = 4.6
 Phillips, W., 1997
Susceptible, sp. P. palmivora (Pod).
 Phillips, W., 1997
Susceptible, 95.00 % Infection, sp. P. palmivora (Pod).
Note: Unripe, Attached and not wounded
 Lawrence, J.S., 1978
9.30 % Infection (Field Reaction).
Note: Severery of infection was Low.. Sime Darby Plantations, Merlimau Estate.
 Lam, K.S., 1992
27.73 % Infection
Note: 22 plants sampled..
 Subali, S., 1992

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Pod Index: 24.8 (pods per kg dried beans)
 Reference
Seed Index: 88.4 (dried beans per 100g)
Pod Index: 23.5 (pods per kg dried beans)
 Reference
Seed Index: 79.3 (dried beans per 100g)
Pod Index: 19.7 (pods per kg dried beans)
 Reference

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Colour: dark purple
Shape: elliptical
Number: 37.0
Total Wet Weight: 59.3 g
Cotyledon Dry Weight: 1.09 g
Cotyledon Length: 22.1 mm
Cotyledon Width: 12.4 mm
 Reference
Number: 37.6
Dry Weight: 1.13 g
 Reference
Number: 30.5
Length: 24.1 mm
Width: 14.2 mm
Thickness: 10.3 mm
Dry Weight: 1.35 g
Cotyledon Dry Weight: 1.26 g
 Reference

Testa: 4.60 %
 Reference
Testa: 6.67 %
 Reference

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Shape: elliptical
Basal Constriction: strong
Apex Form: attenuate
Rugosity: intense
Length: 190.0 mm
Breadth: 76.0 mm
Colour: anthocyanin absent
 Reference
Rugosity: intense
 Reference
Basal Constriction: slight
Apex Form: slightly acute - acute
Rugosity: moderate
Colour: absent anthocyanin
 Reference
Shape: angoleta
Rugosity: moderate
Husk Thickness: 15.5 mm (13 - 18)
Length: 206.0 mm
Breadth: 89.0 mm
Colour: red and yellow
Weight: 653.4 g
Husk Weight: 521.00 g
Length Breadth Ratio: 2.31
 Reference
Shape: cundeamor
Colour: green
 Reference

Colour: moderate anthocyanin
 Reference
Colour: greyish yellow
 Reference

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Ligule Colour: anthocyanin absent
Stamen Colour: anthocyanin absent
Sepal Length: 7.46 mm
Ligule Width: 2.46 mm
Ovule Number: 38
Style Length: 1.96 mm
Pedicel Colour: green
 Reference
Sepal Width: 2.70 mm
Sepal Length: 8.90 mm
Ligule Length: 4.00 mm
Ligule Width: 3.20 mm
Ovary Width: 1.20 mm
Ovary Length: 2.00 mm
Ovule Number: 42
Style Length: 2.50 mm
Staminode Length: 7.40 mm
Pedicel Length: 2.50 mm
 Reference
Self Compatibility: self compatible
 Reference

Hunter, J.R. (1961) The status of cacao variety improvement work in the Western Hemisphere. Cacao (Costa Rica) 4: pp. 1-16.
CEPEC (2012) Accession list for the CEPEC (Bahia, Brazil) collection. Dr. José Luis Pires, personal communication, February 2012.
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
Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.
Dominican Republic - CDC (1987) Informe de los trabajos de indentificacion clonal realizados por el Dr. B.G.Bartley durante su visita a la Estacion "Mata Larga". Unpublished of the Comision del Cacau, Dominican Republic. pp 14
IDIAF (2011) Cocoa accessions held in the Dominican Institute for Agriculture and Forestry Research (IDIAF). M. Ventura, personal communication, September 2011.
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., Mulato-Brito, J. & Lopez-Arroyo, J. (1992) Recursos geneticos del cacao, Theobroma cacao L. disponibles en Mexico. Agricultura Tecnico Mexicana 18(1-2): pp. 25-38.
USDA, ARS Tropical Agriculture Research Station, Mayaguez, Puerto Rico. (2016) List of cocoa accessions held at Mayaguez in April 2016. USDA-ARS GRIN-Global. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.
Perez, A.Z., Reyes, H.E. & Reyes, L.C. (1972) Programa de mejoramiento genetico de cacao en Venezuela. MAC, Caucagua, Venezuela, pp. 131.
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
Lawrence, J.S. (1978) Screening of cacao cultivars for resistance to Phytophthora palmivora in the collection at CATIE, Costa Rica. Revista Theobroma 8: pp. 125-131.
Lam, K.S. (1992) Performance of imported clones in Sime Darby Plantations. In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October, 1992. Kuala Lumpur, Malaysia.
Subali, S. (1992) MARDI's results on performance of imported primary cocoa clones. In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October, 1992. Kuala Lumpur, Malaysia.
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.
Lopez-Baez, O. (1995) Caracteristicas del fruto del germoplasma de cacao, Theobroma cacao L., seleccionado en Rosario Izapa, Chiapas. Agricultura Tecnico Mexicana 21(2): pp. 127-137.
Brazil - CEPEC (1987) List of clones in the CEPEC, Bahia, Brazil collection. Computer printout from CEPEC. Supplied by B.G.D. Bartley, CEPEC, Brazil.
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.
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.
Lopez-Baez, O. & Mendel-Wong, D. (1992) Caracteristicas de la flor y semilla del germoplasma de cacao, Theobroma cacao L., seleccionado en Rosario Izapa, Chiapas. Agricultura Tecnico Mexicana 18(1-2): pp. 39-48.