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IMC 10 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.

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Synonyms: G VI 55, IQUITOS MIXED 10, CCRP6

NOTES

High yielding, self-incompatible [CCRP6] Sujith, S S & J S Minimol, 2016

RECOMMENDED PLANTING MATERIAL Disclaimer

Recommended Planting Material

Disclaimer
Recommendations for planting materials are made by the referenced authors for specific regions and growing conditions. They are provided here as a guide and historic record only. To confirm the most appropriate planting material for your needs and its availability, please contact your local cocoa authority.

Details on clones that are available for distribution and guidelines on the safe movement of cacao germplasm can be obtained from the International Cocoa Quarantine Centre, Reading

Sujith, S S & J S Minimol, 2016: Recommended clone in:
India; Local Name: 'CCRP6'; Recommended by: Kerala Agricultural University, India; Year: pre-2011 (Current); Reference

Reference

Sujith, S S & J S Minimol 2016
Kerala Agricultural University (KAU) Released Cocoa Varieties. Advances in Life Sciences 5 (516): 2278–3849
Disease Recommended material

View Associated Data

PEDIGREE DETAILS

Putative Half-Sibs:: Group P27 Zhang, D. et al., 2009

Reference

Zhang, D., Boccara, M., Motilal, L., Mischke S., Johnson, E.S., Butler, D.R., Bailey, B. & Meinhardt, L. 2009
Molecular characterization of an earliest cacao (Theobroma cacao L.) collection from Upper Amazon using microsatellite DNA markers. Tree Genetics & Genomes. doi:10.1007/s11295-009-0212-2; IMC 105; IMC 107; IMC 11; IMC 12; IMC 13; IMC 16; IMC 18; IMC 23; IMC 27; IMC 30; IMC 33; IMC 38; IMC 42; IMC 44; IMC 47; IMC 53; IMC 55; IMC 58; IMC 59; IMC 6; IMC 60; IMC 61; IMC 63; IMC 65; IMC 68; IMC 71; IMC 76; IMC 77; IMC 78; IMC 85; IMC 9; IMC 96; IMC 98

POPULATION

Motamayor, J.C. et al., 2008: 'Iquitos' Population; Subgroup: 'IMC I' Reference

Reference

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
Population SSR

HELD IN

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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 - 10; - Year of Accession: 1967
India, Central Plantation Crops Research Institute (CPCRI): List received in 2008 Reference

Reference

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.; • Accession: VTLC 55; - Local Name: IMC 10
India, Kerala Agricultural University: List received in 1991 Reference

Reference

India - Kerala 1991
Report of germplasm collection at Kerala Agricultural University. R.V. Nair, Unpublished Report, Kerala Agricultural University, Kerala, India, pp. 3.; • Local Name: G VI 55
Indonesia, Indonesian Coffee and Cocoa Research Institute (ICCRI): List received in 2008 Reference

Reference

Susilo, A. 2008
The list of germplasm collected by ICCRI. Personal communication from Agung Susilo, July 2008.; • Accession: IDN-13-TCAC-00533; - Local Name: IMC10
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 10
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 10
Venezuela, MAC Caucagua: List received in 1971 Reference

Reference

Leon, J. & Sgaravatti, E. 1971
Provisional list of genetic materials for plant introduction and exchange. AGPE Misc 71/2. FAO, Rome. pp. 26.
Notes

Lists of the clones held at CEPEC-Brazil, Nkoemvone-Cameroun, Central Agric. REs. Inst- Ceylon, CIA Palmira-Colombia, IICA-Costa Rica, INIAP-Ecuador, CRI-Ghana, MALF-Grenada, IFCC-Cote D'Ivoire, CIB-Jamaica, CRIN-Nigeria, CRU-Trinidad, Agr. Exp. Stat.-Suriname, Mayaguez-USA, Caucagua-Venezuela.; • Local Name: IMC 10

DISEASE

Vascular Streak Dieback: Tolerant; Sujith, S S & J S Minimol, 2016

Reference

Sujith, S S & J S Minimol 2016
Kerala Agricultural University (KAU) Released Cocoa Varieties. Advances in Life Sciences 5 (516): 2278–3849
Disease Recommended material

YIELD

Frances Bekele & Gillian Bidaisee, 2022: Pod Index: 16.9 (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

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: elliptical; Number: 58.0; Total Wet Weight: 82.2 g; Cotyledon Dry Weight: 1.02 g; Cotyledon Length: 25.0 mm; Cotyledon Width: 12.0 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

BUTTERFAT

Frances Bekele & Gillian Bidaisee, 2022: Testa: 3.70 %; 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
Trinidad - CRU, 1998: Butterfat Content: 55.31 %; Testa: 5.13 %; Reference

Reference

Trinidad - CRU 1998
Fat Analysis Data. Data supplied on computer diskette by F. Bekele, CRU, Trinidad.
Notes

Trinidad - CRU, University of the West Indies Datafile: TTOFATDS TTO - Fat Analysis Germplasm: Data is provided on 410 accessions. Environment: No details given. Descriptors: Data for the fat content of the shell, including standard error and the butterfat content is presented. Methods: Ripe, open pollinated pods were harvested, 2 pods from each of 5 trees (10 pods per accession) were selected. The beans were then mixed thoroughly and a sub-sample taken. The sub-sample was then cleaned to remove the mucliage, oven dried and stored at room temperature until analysis. For each accession 2 bean samples (each consisting of 20 beans) were taken from the bulked sample. The beans were shelled and eaach sample was groung using a coffee grinder (2x30 seconds). The ground samples were then dried for 16 hours at 110 degrees C, cooled and stored in a dessicator at 25 degrees C until analysis. From the cried ground samples, a 2 gram sub-sample was weighed into a beaker, 100 ml of 4.0M HCl was added and the sample boiled for 30 minutes. The boiled sample was filtered and the residue washed with distilled water until clear of pigment. After washing, the filtered sample was placed in an extraction thimble and dried for 16 hours at 60 degrees C. The butterfat from the bean samples was extracted using the Soxtec System (Tecetor). Each dried sample was extracted for one hour using petroleum ether (40-60) as the solvent. The butterfat extracted from the sample was then dried in an oven for 30 minutes at 100 degrees C, cooled in a dessicator and the percentage butterfat determined on a dry matter basis.

Butterfat

FRUIT

Bartley, B.G.D., 1970: Size: large; 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: elliptical; Basal Constriction: slight; Apex Form: obtuse; Rugosity: slight; Length: 172.0 mm; Breadth: 93.0 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

FLUSH

Frances Bekele & Gillian Bidaisee, 2022: Colour: slight 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: 140 mm; Length: 288.0 mm; Width: 109.0 mm; Length to Width Ratio: 2.70; Basal Angle: 127.0 °; Apical Angle: 63.7 °; Petiole Length: 17 mm; Pulvinus Length: 15 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: slight anthocyanin; Sepal Length: 7.50 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: slight anthocyanin; Stamen Colour: slight anthocyanin; Sepal Length: 7.18 mm; Ligule Width: 2.54 mm; Ovule Number: 54; Style Length: 2.18 mm; Pedicel Colour: reddish; 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

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.

Sujith, S S & J S Minimol (2016) Kerala Agricultural University (KAU) Released Cocoa Varieties. Advances in Life Sciences 5 (516): 2278–3849

Zhang, D., Boccara, M., Motilal, L., Mischke S., Johnson, E.S., Butler, D.R., Bailey, B. & Meinhardt, L. (2009) Molecular characterization of an earliest cacao (Theobroma cacao L.) collection from Upper Amazon using microsatellite DNA markers. Tree Genetics & Genomes. doi:10.1007/s11295-009-0212-2

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

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

India - Kerala (1991) Report of germplasm collection at Kerala Agricultural University. R.V. Nair, Unpublished Report, Kerala Agricultural University, Kerala, India, pp. 3.

Susilo, A. (2008) The list of germplasm collected by ICCRI. Personal communication from Agung Susilo, July 2008.

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.

CRU (2011) ICG,T accessions. CRU website.

Leon, J. & Sgaravatti, E. (1971) Provisional list of genetic materials for plant introduction and exchange. AGPE Misc 71/2. FAO, Rome. pp. 26.

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.

Trinidad - CRU (1998) Fat Analysis Data. Data supplied on computer diskette by F. Bekele, CRU, Trinidad.

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

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