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ICS 17    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 17

 Mother to:
SI 17 /1    Trinidad - CRU, 2002
SI 17 /2    Trinidad - CRU, 2002
SI 17 /3    Trinidad - CRU, 2002
 Father to:
SI 17 /1    Trinidad - CRU, 2002
SI 17 /2    Trinidad - CRU, 2002
SI 17 /3    Trinidad - CRU, 2002

 HELD IN

List received in 2012   Reference
• Local Name: ICS-17/T5
 Trinidad and Tobago, International Cocoa Genebank, Trinidad (ICG,T)
List received in 2011   Reference
• Local Name: ICS 17

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Susceptible, sp. P. palmivora (Pod).
 Sreenivasan, T.N., 1993
Susceptible, sp. P. palmivora (Pod).
 Sreenivasan, T.N., 1980
Tolerant (Vegetative).
 Trinidad - CRU, 1994
Tolerant (Pod).
 Trinidad - CRU, 1994

Pod Index: 20.6 (pods per kg dried beans)
 Reference

Colour: purple
Shape: elliptical
Number: 34.0
Total Wet Weight: 70.7 g
Cotyledon Dry Weight: 1.43 g
Cotyledon Length: 25.3 mm
Cotyledon Width: 14.9 mm
 Reference

Testa: 4.30 %
 Reference

Shape: elliptical
Basal Constriction: strong
Apex Form: obtuse
Rugosity: slight
Length: 157.0 mm
Breadth: 85.0 mm
Colour: moderate anthocyanin
 Reference

Colour: anthocyanin absent
 Reference

Self Compatibility: self incompatible
 Reference
Ligule Colour: slight anthocyanin
Stamen Colour: anthocyanin absent
Sepal Length: 8.11 mm
Ligule Width: 2.58 mm
Ovule Number: 41
Style Length: 2.41 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.
Mars Center for Cocoa Science (2012) Accession list for the Mars Center for Cocoa Science. Jean-Philippe Marelli, 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.
Trinidad - CRU (1994) Cocoa Research Unit. Report for 1994. The University of the West Indies.
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.