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IMC 14 Group Name Theobroma cacao

Pound, F.J. (1938)
Cacao and Witchbroom Disease of South America with notes on other species of Theobroma. Archives of Cocoa Research 1: pp. 26-71.

Derivation: Iquitos Mixed Calabacillo (Mid Channel).
Collected by Pound.
Location: Iquitos, Peru.

Pound, 1938a [POU38A]. Main type - very large lagarta calabacillo pods, oval, very smooth, normal blanco. Seeds large, flat, losenge shaped. 'Hybrid group'-large pods, somewhat warty at stem end but smooth and round like calabacillo at the apex. Third group-small, oval, warty pods, dense flowering. Bartley, 1995a [BAR95A]. The common features of this group of clones are the high ovule numbers (65+) and a specific type of anthocyanin pigmentation in the stamens and base of the corolla. Posnette, 1945a [POS45A]. Petioles are of a type intermediate between those of Nanay (see NA) and Parinari (see PA) types; the constriction is usually short and narrow.

Notes: Pound, 1938a [POU38A]. Pods probably collected from at least two groups of trees which were free of Witches' Broom.

Bartley, 1995a [BAR95A]. They are probably the progenies of two trees, later propagated as the clones P 18 [POU] and P 21 [POU].

Pound, 1943b [POU43B]. 112 plants were planted at Marper farm.

Bartley, 1997a, [BAR97A] The progeny of the individual clones is not documented and it is important not to consider the IMC clones as one homogeneous group.

SNP/SSR Populations Images

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Synonyms: G VI 315, IQUITOS MIXED 14

NOTES

August 2006. The accession held by this name at the University of Reading Cocoa Quarantine Centre is now known to have been mislabelled.

GENOME/TRANSCRIPTOME DATA LINKS

Cornejo, O.E. et al., 2018

Reference

BioProject: PRJNA486011 NCBI ENA FASTQ

Project: PRJEB28591 EVA (project) EVA (analysis)

Library Source: Genomic

Run: SRR7774329 NCBI ENA FASTQ

Experiment: SRX4629495

BioSample: SAMN09934467

SampleName: IMC_14

SampleSource: Trinidad, Tree_ID: 17733

HELD IN

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United Kingdom, International Cocoa Quarantine Centre, Reading (ICQC,R): Current List ICQC,R Website; • Accession: RUQ 1634 ICQC,R; - Local Name: IMC 14; - Year of Accession: 2007
Brazil, Comissão Executiva do Plano da Lavoura Cacaueira/Centro de Pesquisas do Cacau (CEPLAC/CEPEC): List received in 2012 Reference

Reference

CEPEC 2012
Accession list for the CEPEC (Bahia, Brazil) collection. Dr. José Luis Pires, personal communication, February 2012.; • Accession: 949; - Local Name: IMC 14; • Accession: 949; - Local Name: IMC 14
Brazil, Mars Center for Cocoa Science: List received in 2012 Reference

Reference

Mars Center for Cocoa Science 2012
Accession list for the Mars Center for Cocoa Science. Jean-Philippe Marelli, personal communication, February 2012.; • Local Name: IMC-14; - Year of Accession: 1996
Costa Rica, Centro Agronómico Tropical de Investigación y Enseñanza (CATIE): List received in 2018 Reference

Reference

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

Excel file received by email.; • Accession: 22380; - Local Name: IMC-14; - Year of Accession: 2017
Ecuador, Estation Experimental Tropical Pichilingue: List received in 2012 Reference

Reference

EET - Pichilingue 2012
Accessions planted in EET - Pichilingue, Ecuador. Freddy Amores and Ignacio Sotomayor C, personal communication, February 2012.; • Local Name: IMC - 14
Honduras, Fundación Hondureña de Investigación Agrícola (FHIA): List received in 1994 Reference

Reference

Honduras - CEDEC 1994
List of accessions in CEDEC, La Masica, Honduras. J.A. Sanchez, FHIA, Honduras. Personal Communication.; • Local Name: IMC 14
India, Kerala Agricultural University: List received in 1997 Reference

Reference

India - Kerala 1997
List of survivng clones from all the introductions. R.V. Nair, Kerala Agricultural University, India. Personal Communication.; • Accession: 315; - Local Name: IMC 14; - Year of Accession: 1993
Indonesia, London Sumatra Plantations (LONSUM): List received in 2008 Reference

Reference

Haeser, E. 2008
Accession list for Bah Lias Research Station, PT.PP. London Sumatra, Indonesia. Personal communication, March 2010.; • Local Name: IMC 14
Malaysia, Agricultural Research Centre (ARC): List received in 1990 Reference

Reference

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.; • Local Name: IMC 14
Papua New Guinea, Cocoa and Coconut Institute (CCI): List received in 1998 Reference

Reference

PNG - Cocoa & Coconut Research 1998
Current list of cocoa accessions at the PNG CCRI. Mr. Mathias Faure, Personal Communication.; • Local Name: IMC 14; - Year of Accession: 1997
Solomon Islands, Solomon Islands Plantations Ltd.: List received in 1993 Reference

Reference

Soloman Islands - S.I. Plantns 1993
Inventory of Soloman Islands Plantations Ltd. Unpublished report, Soloman Islands Plantations Ltd, Soloman Islands, p.1.; • Local Name: IMC 14
Trinidad and Tobago, International Cocoa Genebank, Trinidad (ICG,T): List received in 2011 Reference

Reference

CRU 2011
ICG,T accessions. CRU website.
Notes

Website visited 12th April 2011

Link Unavailable [http://sta.uwi.edu/cru/icgt-accessions.asp]; • Local Name: IMC 14
United States of America, USDA-TARS: List received in 2016 Reference

Reference

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.
Notes

Original link: https://npgsweb.ars-grin.gov/gringlobal/view2.aspx?dv=web_site_taxon_accessionlist¶ms=:taxonomyid=101885;:siteid=7 (not working)

npgsweb.ars-grin.gov/gringlobal/...; • Accession: PI 668471 GRIN-Global; - Local Name: IMC 14; - Year of Accession: 2008
United States of America, USDA-SHRS: List received in 2010 Reference

Reference

USDA-ARS, SHRS, NCGR, National Germplasm Repository, Miami, Florida, USA. 2010
List of cocoa accessions held at Miami and Coconut Grove (Plant Introduction Station) in July, 2010. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN). [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.
Notes

Website visited 8th July 2010.

Link Unavailable [http://www.ars-grin.gov/cgi-bin/npgs/html/tax_site_acc.pl?MAY%20Theobroma%20cacao]; • Accession: MIA 35974 GRIN-Global; - Local Name: IMC 14; - Year of Accession: 2003

DISEASE

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Canker: 30.00 % Infection (Trunk).; Note: Percentage infection of trunk..; Sharma, M., 1992

Reference

Sharma, M. 1992
The performance of imported F0 clones at United Plantations Bhd. In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October, 1992. Kuala Lumpur, Malaysia.
Notes

Malaysia - United Plantations Bhd., Jendarata Estate, Perak Agronomic Characters - United Plantations Bhd., Malaysia, Disease - Oncobasidium theobromae (local names: Vascular Streak Dieback) Datafile: DIS_VSDS - Disease reaction to VSD UP____DS MYS - United Plantations Bhd. Germplasm: Agronomic characteristics and disease reaction information is presented for 126 clones held in the germplasm garden at Sungei Bernam Estate. Environment: Material was planted in 1988. They were underplanted in a 1974 MAWA planting over Selangor series (coastal clay). Descriptors: Early performance of clones was determined by yield measurements over 2 years. Data for two control clones are given: PBC 113 and PBC 130

Disease
Phytophthora: Susceptible, sp. P. palmivora (Pod).; Note: Unripe, Unattached and not wounded; Iwaro, D., 1998

Reference

Iwaro, D. 1998
Evalation of accessions for Black Pod. Personal Communication 30th October 1998. Data sent by email from Dr. Iwaro.
Notes

Trinidad - CRU, University of the West Indies Datafile: DIS_PHDS - Disease reaction to Phytophthora Experimental conditions: Inoculation techinique used - spray method. Inoculum concentration: 100,000 zoospores/ml. Incubated for four days. Character Data: The following descriptions are used to segregate clones according to reaction: no visible symptoms = highly resistant to penetration, 1-5 localised lesions = resistant, 6-15 localised lesions = moderately resistant, >15 localised lesions = partially resistant/resistant to spread of lesion alone, 1-5 expanding lesions = partially resistant/resistant to penetration alone, 6-15 expanding lesions = moderately susceptible, >15 expanding lesions = susceptible, coalesced lesions = highly susceptible Disease - Phytophthora palmivora, P. megakarya (Local Names: Black Pod, Podredumbre negra, Pourriture Brune, Podridao parda).

Disease
Vascular Streak Dieback: 13.33 % Infection; Note: 18 plants sampled..; Subali, S., 1992

Reference

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.
Notes

Malaysia - MARDI Datafile: MARDI_DS MYS - MARDI Germplasm: Agronomic and morphological characteristics of some of the clones held by MARDI. Environment: No details.

Disease

YIELD

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Malaysia - Applied Agriculture, 1992: Seed Index: 92.5 (dried beans per 100g); Pod Index: 21.4 (pods per kg dried beans); Reference

Reference

Malaysia - Applied Agriculture 1992
Data from Applied Agriculture Research Unit (AARU). In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October 1992, Kuala Lumpur, Malaysia: pp. 4.
Notes

Malaysia - Applied Agriculture Research Datafile: AARU__DS MYS - Applied Agriculture Germplasm: Agronomic characteristics of 120 of the clones held at Applied Agriculture Research. The clones were field budded on 1982 seedlings planting between 1984 and 1987. Environment: No details given.

Yield Bean
Malaysia - BAL Plantations, 1991: Seed Index: 129.8 (dried beans per 100g); Pod Index: 24.7 (pods per kg dried beans); Reference

Reference

Malaysia - BAL Plantations 1991
Results from cocoa butter content determinations using Nuclear Magnetic Resonance (NMR) analysis. G. Lockwood, CDC, U.K. Personal Communication.
Notes

Malaysia - BAL Plantations Datafile: BAL2__DS MYS - BAL Plantations (update) Environment: Trials are planted on Table Estate, Tawau. Trial CA81 - planted August 1987 in 3x6 tree plots, 3 replicates randomised blocks, trees spaced at 3.8m x 2.4 m (1,096 trees/ha). Trial CA88 - similar design, planted August 1988. Soil type is fairly fertile young volcanic basalt. Average rainfall is c. 2100 mm/year well distributed, the driest month being February with about 150 mm. Descriptors: Cocoa butter analysis:- samples of a minimum of 2 kg were fermented in net bags placed in the fermentation heap and subsequently fast (i.e. continuously) dried. Determinations were carried out by MacRobertson Foods Pte Ltd. (a division of Cadbury-Schweppes Ltd.) in Singapore using a Nuclear Magnetic Resonance machine.

Yield Bean Butterfat Flower
Frances Bekele & Gillian Bidaisee, 2022: Pod Index: 25.2 (pods per kg dried beans); Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

BEAN

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Malaysia - Applied Agriculture, 1992: Number: 43.4; Dry Weight: 1.08 g; Reference

Reference

Malaysia - Applied Agriculture 1992
Data from Applied Agriculture Research Unit (AARU). In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October 1992, Kuala Lumpur, Malaysia: pp. 4.
Notes

Malaysia - Applied Agriculture Research Datafile: AARU__DS MYS - Applied Agriculture Germplasm: Agronomic characteristics of 120 of the clones held at Applied Agriculture Research. The clones were field budded on 1982 seedlings planting between 1984 and 1987. Environment: No details given.

Yield Bean
Malaysia - BAL Plantations, 1991: Number: 52.7; Total Dry Weight: 40.5 g; Dry Weight: 0.77 g; Note: 50 plants sampled; Reference

Reference

Malaysia - BAL Plantations 1991
Results from cocoa butter content determinations using Nuclear Magnetic Resonance (NMR) analysis. G. Lockwood, CDC, U.K. Personal Communication.
Notes

Malaysia - BAL Plantations Datafile: BAL2__DS MYS - BAL Plantations (update) Environment: Trials are planted on Table Estate, Tawau. Trial CA81 - planted August 1987 in 3x6 tree plots, 3 replicates randomised blocks, trees spaced at 3.8m x 2.4 m (1,096 trees/ha). Trial CA88 - similar design, planted August 1988. Soil type is fairly fertile young volcanic basalt. Average rainfall is c. 2100 mm/year well distributed, the driest month being February with about 150 mm. Descriptors: Cocoa butter analysis:- samples of a minimum of 2 kg were fermented in net bags placed in the fermentation heap and subsequently fast (i.e. continuously) dried. Determinations were carried out by MacRobertson Foods Pte Ltd. (a division of Cadbury-Schweppes Ltd.) in Singapore using a Nuclear Magnetic Resonance machine.

Yield Bean Butterfat Flower
Bartley, B.G.D., 1970: Size: medium; Reference

Reference

Bartley, B.G.D. 1970
A preliminary catalogue of the cacao germplasm held at the University of the West Indies, Trinidad. University of the West Indies, St. Augustine, Trinidad.
Notes

Trinidad - University of the West Indies Datafile: ICGT2_DS TTO - UWI Cacao Collection Germplasm: Passport descriptors for approximately 1000 accessions of mainly South American and Trinidadian origin. Environment: No details. Descriptors: Six descriptors for fruit, seed and compatability characteristics. Character Data: Combinations used FXC = forastero x criollo, TX = trinitario cross

Bean Fruit Flower
Frances Bekele & Gillian Bidaisee, 2022: Colour: purple; Shape: ovate; Number: 53.0; Total Wet Weight: 64.8 g; Cotyledon Dry Weight: 0.75 g; Cotyledon Length: 20.9 mm; Cotyledon Width: 9.9 mm; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower
Palaniappan, S. & Shuhaimi Shamsuddin, 1992: Number: 56.3; Dry Weight: 0.94 g; Reference

Reference

Palaniappan, S. & Shuhaimi Shamsuddin 1992
Early evaluation of some cocoa germplasm at Pusut Perkhidmatan Pertanian Tun Razak. In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October, 1992. Kuala Lumpur, Malaysia.
Notes

Malaysia - FELDA, Pusat Perkhidmatan Pertanian Tun Razak, Peninsula Malaysia Datafile: FELDA_DC MYS - Felda PPPTR Germplasm: Agronomic and morphological characteristics of some of the clones held at Pusat Perkhidmatan Pertanian Tun Razak. The clones were obtained from the Malaysian Cocoa Growers Council Joint Importation Scheme, MARDI and the Department of Agriculture, Peninsular Malaysia. Environment: The clones are planted in single plots of 18 plants/clone (6x3) at Pusat Perkhidmatan Pertanian Tun Razak, Sg. Tekam in inland Peninsular Malaysia. The clones were planted as they were obtained and therefore are of varying age. Character data: Seed dry weight: corrected to 6% moisture after oven drying at 105'C for 24 hours.

Bean Fruit

BUTTERFAT

Malaysia - BAL Plantations, 1991: Butterfat Content: 55.30 %; Maximum Butterfat Content: 56.18 %; Minimum Butterfat Content: 54.18 %; Note: 9 plants sampled; Reference

Reference

Malaysia - BAL Plantations 1991
Results from cocoa butter content determinations using Nuclear Magnetic Resonance (NMR) analysis. G. Lockwood, CDC, U.K. Personal Communication.
Notes

Malaysia - BAL Plantations Datafile: BAL2__DS MYS - BAL Plantations (update) Environment: Trials are planted on Table Estate, Tawau. Trial CA81 - planted August 1987 in 3x6 tree plots, 3 replicates randomised blocks, trees spaced at 3.8m x 2.4 m (1,096 trees/ha). Trial CA88 - similar design, planted August 1988. Soil type is fairly fertile young volcanic basalt. Average rainfall is c. 2100 mm/year well distributed, the driest month being February with about 150 mm. Descriptors: Cocoa butter analysis:- samples of a minimum of 2 kg were fermented in net bags placed in the fermentation heap and subsequently fast (i.e. continuously) dried. Determinations were carried out by MacRobertson Foods Pte Ltd. (a division of Cadbury-Schweppes Ltd.) in Singapore using a Nuclear Magnetic Resonance machine.

Yield Bean Butterfat Flower
Frances Bekele & Gillian Bidaisee, 2022: Testa: 2.70 %; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

FRUIT

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Bartley, B.G.D., 1970: Size: medium; Reference

Reference

Bartley, B.G.D. 1970
A preliminary catalogue of the cacao germplasm held at the University of the West Indies, Trinidad. University of the West Indies, St. Augustine, Trinidad.
Notes

Trinidad - University of the West Indies Datafile: ICGT2_DS TTO - UWI Cacao Collection Germplasm: Passport descriptors for approximately 1000 accessions of mainly South American and Trinidadian origin. Environment: No details. Descriptors: Six descriptors for fruit, seed and compatability characteristics. Character Data: Combinations used FXC = forastero x criollo, TX = trinitario cross

Bean Fruit Flower
Frances Bekele & Gillian Bidaisee, 2022: Shape: obovate; Basal Constriction: moderate; Apex Form: obtuse; Rugosity: slight; Length: 181.0 mm; Breadth: 90.0 mm; Colour: anthocyanin absent; Hardness: hard; Note: Hardness > 2.0 Mpa; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower
Palaniappan, S. & Shuhaimi Shamsuddin, 1992: Length: 188.5 mm; Breadth: 88.4 mm; Weight: 600.3 g; Length Breadth Ratio: 2.10; Reference

Reference

Palaniappan, S. & Shuhaimi Shamsuddin 1992
Early evaluation of some cocoa germplasm at Pusut Perkhidmatan Pertanian Tun Razak. In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October, 1992. Kuala Lumpur, Malaysia.
Notes

Malaysia - FELDA, Pusat Perkhidmatan Pertanian Tun Razak, Peninsula Malaysia Datafile: FELDA_DC MYS - Felda PPPTR Germplasm: Agronomic and morphological characteristics of some of the clones held at Pusat Perkhidmatan Pertanian Tun Razak. The clones were obtained from the Malaysian Cocoa Growers Council Joint Importation Scheme, MARDI and the Department of Agriculture, Peninsular Malaysia. Environment: The clones are planted in single plots of 18 plants/clone (6x3) at Pusat Perkhidmatan Pertanian Tun Razak, Sg. Tekam in inland Peninsular Malaysia. The clones were planted as they were obtained and therefore are of varying age. Character data: Seed dry weight: corrected to 6% moisture after oven drying at 105'C for 24 hours.

Bean Fruit

PHENOTYPING

Fiona Lahive, 2017: Accession: RUQ 1634; Light Saturated Photosynthetic Rate: 4.55 μmol m² s^-1; Stomatal Conductance: 0.11 mol m² s^-1; Transpiration Rate: 1.20 mmol m² s^-1; Intrinsic Water Use Efficiency: 41.43 μmol mol^-1; Instantaneous Water Use Efficiency: 3.78 mmol mol^-1; Flush Size: 6; Leaf Area: 336.10 cm²; Leaf Dry Weight: 2.29 g; Specific Leaf Area: 148.50 cm² g^-1; Reference

Reference

Fiona Lahive 2017
Phenotypic data from climate change trials. Personal communication.
Notes

Data for single trees in ICQC,R. Each value is a mean of 2 time points with 6 leaves per tree (12 measurements), except flush size, which was 2 branches per tree (4 measurements).

Phenotyping

FLUSH

Allen, J.B., 1988: Colour: intermediate anthocyanin; Reference

Reference

Allen, J.B. 1988
Geographical variation and population biology in wild Theobroma cacao. PhD. Thesis, University of Edinburgh, U.K. pp. 197.
Notes

Colombia, Ecuador - Amazon region Datafile: LCT___DC ECU - LCTAP Fruit and seed characteristics LCT2__DS LCTAP Habit and flower characteristics LCT___DS ECU - LCTAP Field and genebank data Germplasm: Details of 234 LCT-EEN and EBC accessions from material collected in the Amazon region of Ecuador and R. Caqueta, Colombia and several of Pound's collections held at the San Carlos genebank. Environment: Accessions were either described at the time of collection or after planting in the field genebank at the San Carlos site of the INIAP Napo-Payamino Experimental Station in Napo Province. In the field genebank, a maximum of 10 seedlings for each collection were planted in a single row and budwood collections were planted as a row of up to 5 plants. Trees were spaced at 3m within the row and 4m between rows. Meteorological data are given in the table as mean daily maximum and mean daily minimum temperature and mean total rainfall per month. Soil analyses were carried out in the Department of Forestry and Natural Resources, Edinburgh University, UK. The table shows the means of duplicate analyses of five samples taken from the genebank site and the forest surrounding the genebank. Soil data: pH 4.2 Org. Mat. (%) 9.4 N (Total, %) 0.3 P (Total, µg/g) 702 Ca (meq/100g) 5.19 Mg (meq/100g) 1.60 K (meq/100g) 0.48 Ca/Mg (ratio) 3.24 Ca+Mg/K (ratio) 14.1 Meteorological data: Temperature (°C) Rainfall (mm) Daily Max. Daily Min. January 30.9 21.2 116.2 February 29.1 20.6 272.3 March 29.8 21.2 260.0 April 29.9 21.3 327.5 May 29.9 21.0 287.9 June 27.9 20.4 308.1 July 28.1 20.0 254.1 August 29.3 20.3 262.5 September 30.3 20.5 282.4 October 30.6 21.1 257.1 November 30.8 21.1 361.2 December 31.0 21.4 154.8 Descriptors: The coding of the descriptors, and the methodology of recording, is based on the IBPGR standardised format, Engels et al., 1980 [ENG80A] and Engels, 1981 [ENG81A]. However, pod and bean data were recorded from a sample of 1-5 pods per collection, rather than the recommended sample of 10-20 pods due to limited availability of pods.

Flush Flower
Frances Bekele & Gillian Bidaisee, 2022: Colour: moderate anthocyanin; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

LEAF

Trinidad - ICGT, 1992: Distance from Base to Widest Part: 124 mm; Length: 277.0 mm; Width: 99.0 mm; Length to Width Ratio: 2.80; Basal Angle: 133.2 °; Apical Angle: 75.8 °; Petiole Length: 19 mm; Pulvinus Length: 14 mm; Reference

Reference

Trinidad - ICGT 1992
Leaf descriptors. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.
Notes

Trinidad - International Cocoa Genebank, CRU, University of the West Indies.
Flower descriptor data is presented for 620 clones, fruit descriptor data of 333 and seed characters of 118 clones are partly described. Leaf descriptor data is presented for 229 clones. The germplasm is mainly of Peruvian, Ecuadorian and Colombian origin. Environment: Each clone is represented in the collection by up to 16 trees planted 1.8 m apart in a block design. Shading is provided by Erythrina sp. (spaced 60m apart) and bananas (spaced 4m apart). Fertilizer, N-P-K (15:10:5), is provided twice a year at 250g per tree. Cyclic irrigation is performed from February to May (10 l of water per plant/week). Soil type group -33 A 1 Soil Series - Cunupia fine sandy clay with restricted internal drainage Lithology - silty clay alluvium Drainage - imperfect Slope category - 0°-2° Meterological data are given in this table as mean maximum, mean minimum and overall mean temperature and mean total rainfall per month over the period 1961-1990. Month Temp. (°C) Rainfall Max Min Mean (mm) January 30.1 20.8 24.6 71.2 February 30.2 20.8 25.0 43.3 March 31.2 21.4 25.7 36.6 April 31.8 22.3 26.5 51.1 May 31.6 23.3 26.9 116.5 June 30.6 23.3 26.4 252.1 July 30.8 23.0 26.2 266.3 August 31.2 22.9 26.4 250.1 September 31.5 22.8 26.5 202.5 October 31.4 22.82 6.41 99.3 November 30.8 22.4 25.9 227.8 December 30.2 21.5 25.2 155.6 Descriptors: The character selection is based on the IBPGR list (IBPGR, 1981 [IBP81A]). Where descriptor states present real measurements, e.g. pod length in cm, the data are given as the mean of all the measurements ± the standard deviation. For some descriptors, such as Leaf, flush colour, the phenotypic expression of the character is coded on a scale from 0 to 9. On this scale '0' represents the lowest or weakest expression of a characteristic and '9' represents the highest or strongest. Leaf and Flower Characteristics p.300-307

Leaf

FLOWER

Allen, J.B., 1988: Stamen Colour: slight anthocyanin; Sepal Colour: anthocyanin absent; Sepal Length: 10.50 mm; Ovary Colour: anthocyanin absent (apical); Pedicel Colour: slight anthocyanin; Reference

Reference

Allen, J.B. 1988
Geographical variation and population biology in wild Theobroma cacao. PhD. Thesis, University of Edinburgh, U.K. pp. 197.
Notes

Colombia, Ecuador - Amazon region Datafile: LCT___DC ECU - LCTAP Fruit and seed characteristics LCT2__DS LCTAP Habit and flower characteristics LCT___DS ECU - LCTAP Field and genebank data Germplasm: Details of 234 LCT-EEN and EBC accessions from material collected in the Amazon region of Ecuador and R. Caqueta, Colombia and several of Pound's collections held at the San Carlos genebank. Environment: Accessions were either described at the time of collection or after planting in the field genebank at the San Carlos site of the INIAP Napo-Payamino Experimental Station in Napo Province. In the field genebank, a maximum of 10 seedlings for each collection were planted in a single row and budwood collections were planted as a row of up to 5 plants. Trees were spaced at 3m within the row and 4m between rows. Meteorological data are given in the table as mean daily maximum and mean daily minimum temperature and mean total rainfall per month. Soil analyses were carried out in the Department of Forestry and Natural Resources, Edinburgh University, UK. The table shows the means of duplicate analyses of five samples taken from the genebank site and the forest surrounding the genebank. Soil data: pH 4.2 Org. Mat. (%) 9.4 N (Total, %) 0.3 P (Total, µg/g) 702 Ca (meq/100g) 5.19 Mg (meq/100g) 1.60 K (meq/100g) 0.48 Ca/Mg (ratio) 3.24 Ca+Mg/K (ratio) 14.1 Meteorological data: Temperature (°C) Rainfall (mm) Daily Max. Daily Min. January 30.9 21.2 116.2 February 29.1 20.6 272.3 March 29.8 21.2 260.0 April 29.9 21.3 327.5 May 29.9 21.0 287.9 June 27.9 20.4 308.1 July 28.1 20.0 254.1 August 29.3 20.3 262.5 September 30.3 20.5 282.4 October 30.6 21.1 257.1 November 30.8 21.1 361.2 December 31.0 21.4 154.8 Descriptors: The coding of the descriptors, and the methodology of recording, is based on the IBPGR standardised format, Engels et al., 1980 [ENG80A] and Engels, 1981 [ENG81A]. However, pod and bean data were recorded from a sample of 1-5 pods per collection, rather than the recommended sample of 10-20 pods due to limited availability of pods.

Flush Flower
Frances Bekele & Gillian Bidaisee, 2022: Ligule Colour: moderate anthocyanin; Stamen Colour: slight anthocyanin; Sepal Length: 8.95 mm; Ligule Width: 2.31 mm; Ovule Number: 54; Style Length: 2.19 mm; Pedicel Colour: red; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

REFERENCES

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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.

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.

EET - Pichilingue (2012) Accessions planted in EET - Pichilingue, Ecuador. Freddy Amores and Ignacio Sotomayor C, personal communication, February 2012.

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USDA-ARS, SHRS, NCGR, National Germplasm Repository, Miami, Florida, USA. (2010) List of cocoa accessions held at Miami and Coconut Grove (Plant Introduction Station) in July, 2010. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN). [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.

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Malaysia - BAL Plantations (1991) Results from cocoa butter content determinations using Nuclear Magnetic Resonance (NMR) analysis. G. Lockwood, CDC, U.K. Personal Communication.

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.

Bartley, B.G.D. (1970) A preliminary catalogue of the cacao germplasm held at the University of the West Indies, Trinidad. University of the West Indies, St. Augustine, Trinidad.

Palaniappan, S. & Shuhaimi Shamsuddin (1992) Early evaluation of some cocoa germplasm at Pusut Perkhidmatan Pertanian Tun Razak. In: Unpublished Proceedings of MCGC Mini-Seminar on the Performance of Imported Cocoa Clones, 13th October, 1992. Kuala Lumpur, Malaysia.

Fiona Lahive (2017) Phenotypic data from climate change trials. Personal communication.

Allen, J.B. (1988) Geographical variation and population biology in wild Theobroma cacao. PhD. Thesis, University of Edinburgh, U.K. pp. 197.

Trinidad - ICGT (1992) Leaf descriptors. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.