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ICS 68    Theobroma cacao

 Lockwood, G. & Gyamfi, M.M.O. (1979)
The CRIG cocoa germplasm collection with notes on codes used in the breeding programme at Tafo and elsewhere.. Technical Bulletin, No. 10, Cocoa Research Institute, Tafo, Ghana. pp. 62.

Derivation: Imperial College Selections.
Location: ICTA, TTO.

Notes:  Lockwood & Gyamfi, 1979 [LOC79A] Selections from farms in Trinidad (1-100) and from Criollo progenies (101-107).

Cope, 1949a [COP49A]. One hundred selections were made as a result of a survey started in 1930 by Pound.

Bartley, 1993a [BAR93A]. Numbers 1 to 100 were selected from all over Trinidad, numbers 101 to 107 were Criollo trees selected from a farm but all have been lost and numbers greater than 111 are selections made in an experimental programme.

Bartley, 1996a [BAR96A]. The ICS material includes several clones which resulted from recent (at that time) introductions. These include Criollos from Nicaragua (ICS 60 and its relatives) or Venezuela. Other ICS clones represent "Amazonian" types originally introduced from the Orinoco. It is likely that several introductions were involved in creating the diversity that existed in Trinidad when Pound started the selection work.

Bartley, 1997b [BAR97B] From ICS 113 onwards these clones were used as parents in the AX / MX series. The same cross be known by an equivalent C [TTO] name.
 

Synonyms: I S C 68

 NOTES

Lockwood & Gyamfi, 1979 [LOC79A] Selections from farms in Trinidad (1-100) and from Criollo progenies (101-107). Cope, 1949a [COP49A]. One hundred selections were made as a result of a survey started in 1930 by Pound. Bartley, 1993a [BAR93A]. Numbers 1 to 100 were selected from all over Trinidad, numbers 101 to 107 were Criollo trees selected from a farm but all have been lost and numbers greater than 111 are selections made in an experimental programme. Bartley, 1996a [BAR96A]. The ICS material includes several clones which resulted from recent (at that time) introductions. These include Criollos from Nicaragua (ICS 60 and its relatives) or Venezuela. Other ICS clones represent "Amazonian" types originally introduced from the Orinoco. It is likely that several introductions were involved in creating the diversity that existed in Trinidad when Pound started the selection work. Bartley, 1997b [BAR97B] From ICS 113 onwards these clones were used as parents in the AX / MX series. The same cross be known by an equivalent C [TTO] name.

 HELD IN

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Current List   ICQC,R Website
• Accession: RUQ 903     ICQC,R 
   - Local Name: ICS 68
   - Year of Accession: 1999
List received in 1985   Reference
• Local Name: ICS 68
List received in 2018   Reference
• Accession: 21889
   - Local Name: ICS-68
   - Year of Accession: 2005
List received in 2012   Reference
• Local Name: ICS68
List received in 2008   Reference
• Accession: IDN-13-TCAC-00545
   - Local Name: ICS68
List received in 2011   Reference
• Local Name: ICS 68

 PESTS

 Red Squirrel
Susceptible (Sciurus granatensis)
 Warren, J. & Emamdie, D., 1993

 YIELD

 Frances Bekele & Gillian Bidaisee, 2022
Pod Index: 15.9 (pods per kg dried beans)
 Reference

 BEAN

 Frances Bekele & Gillian Bidaisee, 2022
Colour: purple
Shape: elliptical
Number: 50.0
Total Wet Weight: 93.0 g
Cotyledon Dry Weight: 1.26 g
Cotyledon Length: 22.7 mm
Cotyledon Width: 12.6 mm
 Reference

 BUTTERFAT

 Frances Bekele & Gillian Bidaisee, 2022
Testa: 6.00 %
 Reference
 Trinidad - CRU, 1998
Butterfat Content: 53.94 %
Testa: 5.79 %
 Reference

 FRUIT

 Frances Bekele & Gillian Bidaisee, 2022
Shape: oblong
Basal Constriction: strong
Apex Form: attenuate
Rugosity: intense
Length: 226.0 mm
Breadth: 87.0 mm
Colour: moderate anthocyanin
Hardness: hard
Note: Hardness > 2.0 Mpa
 Reference

 PHENOTYPING

 Fiona Lahive, 2017
Accession: RUQ 903
Light Saturated Photosynthetic Rate: 3.30 μmol m2 s-1
Stomatal Conductance: 0.06 mol m2 s-1
Transpiration Rate: 0.91 mmol m2 s-1
Intrinsic Water Use Efficiency: 62.46 μmol mol-1
Instantaneous Water Use Efficiency: 3.76 mmol mol-1
Flush Size: 4
Leaf Area: 275.10 cm2
Leaf Dry Weight: 1.63 g
Specific Leaf Area: 170.80 cm2 g-1
 Reference

 FLUSH

 Frances Bekele & Gillian Bidaisee, 2022
Colour: anthocyanin absent
 Reference

 LEAF

 Trinidad - ICGT, 1992
Distance from Base to Widest Part: 166 mm
Length: 345.0 mm
Width: 113.0 mm
Length to Width Ratio: 3.00
Basal Angle: 115.6 °
Apical Angle: 85.6 °
Petiole Length: 26 mm
Pulvinus Length: 15 mm
 Reference

 FLOWER

 Bartley, B.G.D., 1970
Self Compatibility: self compatible
 Reference
 Frances Bekele & Gillian Bidaisee, 2022
Ligule Colour: slight anthocyanin
Stamen Colour: slight anthocyanin
Sepal Length: 7.40 mm
Ligule Width: 2.94 mm
Ovule Number: 52
Style Length: 1.93 mm
Pedicel Colour: red
 Reference

Lockwood, G. & Gyamfi, M.M.O. (1979) The CRIG cocoa germplasm collection with notes on codes used in the breeding programme at Tafo and elsewhere.. Technical Bulletin, No. 10, Cocoa Research Institute, Tafo, Ghana. pp. 62.
Cameroon - IRAD Cameroun (1985) Collection Camerounaise de cacaoyers (situation en Juillet, 1985).. Unpublished report, IRCC Cameroun. Supplied by A.B. Eskes, IRCC Montpellier.
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.
Susilo, A. (2008) The list of germplasm collected by ICCRI.. Personal communication from Agung Susilo, July 2008.
CRU (2011) ICG,T accessions.. CRU website.
Warren, J. & Emamdie, D. (1993) Rodent resistance in cacao Theobroma cacao L.. Tropical Agriculture (Trinidad), 70: pp.286-288
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.
Trinidad - CRU (1998) Fat Analysis Data.. Data supplied on computer diskette by F. Bekele, CRU, Trinidad.
Fiona Lahive (2017) Phenotypic data from climate change trials.. Personal communication.
Trinidad - ICGT (1992) Leaf descriptors.. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.
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.