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ICS 83    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, Trinidad and Tobago.

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 83

 Mother to:
SI 83 /2    Trinidad - CRU, 2002
SI 83 /3    Trinidad - CRU, 2002
SI 83 /4    Trinidad - CRU, 2002
 Father to:
SI 83 /2    Trinidad - CRU, 2002
SI 83 /3    Trinidad - CRU, 2002
SI 83 /4    Trinidad - CRU, 2002

 HELD IN

List received in 2012   Reference
• Local Name: ICS83
 Trinidad and Tobago, International Cocoa Genebank, Trinidad (ICG,T)
List received in 2011   Reference
• Local Name: ICS 83

Intermediate, sp. P. palmivora (Pod).
 Sreenivasan, T.N., 1993
Moderate Resistance, sp. P. palmivora (Pod).
 Sreenivasan, T.N., 1980

Pod Index: 20.5 (pods per kg dried beans)
 Reference

Colour: dark purple
Shape: oblong
Number: 41.0
Total Wet Weight: 74.3 g
Cotyledon Dry Weight: 1.19 g
Cotyledon Length: 23.8 mm
Cotyledon Width: 14.3 mm
 Reference

Testa: 6.20 %
 Reference

Shape: elliptical
Basal Constriction: slight
Apex Form: acute
Rugosity: slight
Length: 158.0 mm
Breadth: 94.0 mm
Colour: moderate anthocyanin
Hardness: hard
Note: Hardness > 2.0 Mpa
 Reference

Colour: moderate anthocyanin
 Reference

Distance from Base to Widest Part: 118 mm
Length: 252.0 mm
Width: 90.0 mm
Length to Width Ratio: 2.80
Basal Angle: 95.3 °
Apical Angle: 73.8 °
Petiole Length: 11 mm
Pulvinus Length: 17 mm
 Reference

Self Compatibility: self incompatible
 Reference
Ligule Colour: slight anthocyanin
Stamen Colour: anthocyanin absent
Sepal Length: 8.13 mm
Ligule Width: 2.92 mm
Ovule Number: 37
Style Length: 2.15 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.
Trinidad - CRU (2002) ICG,T accessions database, reply to queries regarding names new to ICGD. Dr. David Butler, ICG,T Trinidad. Personal Communication. 12 September 2002.
CRIG (2012) Cocoa accessions held in the Cocoa Research Institute of Ghana (CRIG). Francis Kwame Padi, personal communication, February 2012.
CRU (2011) ICG,T accessions. CRU website.
Sreenivasan, T.N. (1993) Screening for resistance to Black Pod. T.N. Sreenivasan, CRU, Trinidad. Personal Communication.
Sreenivasan, T.N. (1980) Screening for resistance to Black Pod. Cocoa Research Unit Annual Report on Cocoa Research 1975-1980. University of the West Indies, Trinidad. p.16.
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 - 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.