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C 40 [TRI]    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: alphabetic code.
Collected by ICTA.
Location: River Estate, Trinidad and Tobago.

Notes:  Lockwood & Gyamfi, 1979 [LOC79A] Crosses made pre-1954, including material from Central America.
 

Synonyms: C 40 [NIC]

 NOTES

Name given to the pod produced from the cross. Seedlings are identified by the addition of a suffix.

 PEDIGREE DETAILS

 Parents:
MXT 55  x MXT 49 
 - Local selections
   Trinidad - ICTA, No Date

 HELD IN

List received in 2018   Reference
• Accession: 22001
   - Local Name: C-40
   - Year of Accession: 2006
List received in 2011   Reference
• Local Name: C 40

 YIELD

 Frances Bekele & Gillian Bidaisee, 2022
Pod Index: 27.1 (pods per kg dried beans)
 Reference

 BEAN

 Frances Bekele & Gillian Bidaisee, 2022
Colour: dark purple
Shape: elliptical
Number: 48.0
Total Wet Weight: 53.8 g
Cotyledon Dry Weight: 0.77 g
Cotyledon Length: 20.1 mm
Cotyledon Width: 11.5 mm
 Reference

 BUTTERFAT

 Frances Bekele & Gillian Bidaisee, 2022
Testa: 4.60 %
 Reference

 FRUIT

 Frances Bekele & Gillian Bidaisee, 2022
Shape: elliptical
Basal Constriction: strong
Apex Form: indented
Rugosity: slight
Length: 161.0 mm
Breadth: 77.0 mm
Colour: anthocyanin absent
Hardness: moderate
Note: Hardness > 1.6 and <= 2.0 Mpa
 Reference

 PHENOTYPING

 Fiona Lahive, 2017
Accession: RUQ 670
Light Saturated Photosynthetic Rate: 4.87 μmol m2 s-1
Stomatal Conductance: 0.13 mol m2 s-1
Transpiration Rate: 1.46 mmol m2 s-1
Intrinsic Water Use Efficiency: 39.62 μmol mol-1
Instantaneous Water Use Efficiency: 3.56 mmol mol-1
Flush Size: 5
Leaf Area: 189.10 cm2
Leaf Dry Weight: 1.35 g
Specific Leaf Area: 144.90 cm2 g-1
 Reference

 FLUSH

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

 FLOWER

 Frances Bekele & Gillian Bidaisee, 2022
Ligule Colour: anthocyanin absent
Stamen Colour: anthocyanin absent
Sepal Length: 6.83 mm
Ligule Width: 2.25 mm
Ovule Number: 45
Style Length: 1.93 mm
Pedicel Colour: green
 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 - ICTA (No Date) List of C Crosses. Unpublished report, Imperial College of Tropical Agriculture, Trinidad. pp.4.
Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.
CRU (2011) ICG,T accessions. CRU website.
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.
Fiona Lahive (2017) Phenotypic data from climate change trials. Personal communication.