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CRU 12    Theobroma cacao

Derivation: Cocoa Research Unit.
Location: ICGT, TTO.

Notes:  Selections made from Trinidad populations.
 

 NOTES

Selections made from Trinidad populations.

 HELD IN

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Current List   ICQC,R Website
• Accession: RUQ 1528     ICQC,R 
   - Local Name: CRU 12
   - Year of Accession: 2004
List received in 2012   Reference
• Accession: 1242
   - Local Name: CRU 12
List received in 2012   Reference
• Local Name: CRU-12/T14
• Local Name: CRU-12/T4
List received in 2012   Reference
• Local Name: CRU12
List received in 2011   Reference
• Local Name: CRU 12

 DISEASE

 Phytophthora
Resistant, sp. P. palmivora (Pod).
Note: Score: 1 (1-8 Scale). Fully grown, unripe detached pods (4-5 months old).
 A.D. Iwaro et al., 2006

 YIELD

 Frances Bekele & Gillian Bidaisee, 2016
Pod Index: 28.0 (pods per kg dried beans)
 Reference

 BEAN

 Frances Bekele & Gillian Bidaisee, 2016
Colour: purple
Shape: elliptical
Number: 34.0
Total Wet Weight: 51.4 g
Cotyledon Dry Weight: 1.05 g
Cotyledon Length: 19.9 mm
Cotyledon Width: 12.1 mm
 Reference

 BUTTERFAT

 Trinidad - CRU, 1998
Butterfat Content: 52.40 %
Testa: 6.20 %
 Reference

 FRUIT

 Frances Bekele & Gillian Bidaisee, 2016
Shape: oblong
Basal Constriction: strong
Apex Form: attenuate
Rugosity: intense
Length: 165.0 mm
Breadth: 74.0 mm
Colour: slight anthocyanin
Note: Pod wall hardness > 1.6 MPa ? 2.0 MPa
 Reference

 PHENOTYPING

 Fiona Lahive, 2017
Accession: RUQ 1528
Light Saturated Photosynthetic Rate: 3.80 μmol m2 s-1
Stomatal Conductance: 0.07 mol m2 s-1
Transpiration Rate: 1.13 mmol m2 s-1
Intrinsic Water Use Efficiency: 53.05 μmol mol-1
Instantaneous Water Use Efficiency: 3.34 mmol mol-1
Flush Size: 4
Leaf Area: 292.30 cm2
Leaf Dry Weight: 2.09 g
Specific Leaf Area: 142.00 cm2 g-1
 Reference

 FLOWER

 Frances Bekele & Gillian Bidaisee, 2016
Ligule Colour: slight anthocyanin
Stamen Colour: slight anthocyanin
Sepal Length: 7.68 mm
Ligule Width: 2.11 mm
Ovule Number: 40
Style Length: 2.61 mm
Pedicel Colour: red
 Reference
 Trinidad - ICGT, 1998
Ligule Colour: slight anthocyanin
Stamen Colour: slight anthocyanin
Sepal Length: 7.86 mm
Ligule Width: 2.07 mm
Ovule Number: 41
Style Length: 2.57 mm
Pedicel Colour: very slight anthocyanin
 Reference

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.
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.
A.D. Iwaro, D.R. Butler & A.B. Eskes (2006) Sources of resistance to Phytophthora pod rot at the International Cocoa Genebank, Trinidad. Genetic Resources and Crop Evolution (2006) 53: 99–109
Frances Bekele & Gillian Bidaisee (2016) Morphological data from the International Cocoa Collection (ICG,T) maintained by the Cocoa Research Centre (CRC), Trinidad & Tobago.. Unpublished data on fruit and flower morphology supplied as an Excel spreadsheet by Frances Bekele, April 2016.
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 (1998) Flower and fruit descriptions.. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies