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LZ 8    Theobroma cacao

 Pound, F.J. (1943)
First report on the selection of cacao trees for resistance to Witches' Broom disease. Unpublished report, Ministry of Agriculture, Trinidad.

Derivation: Large vuelta Z.
Collected by Pound.
Location: Limoncillo, Ecuador.

Notes:  Seedlings from selected trees, established at Marper farm, Trinidad.

10/09/96 Previously recorded in the ICGD and elsewhere that LZ stood for Limoncillo. However, Pound 1943b [POU43B] indicates that it stands for Large Vuelta Z.


 

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 United Kingdom, International Cocoa Quarantine Centre, Reading (ICQC,R)
Current List   ICQC,R Website
• Accession: RUQ 1231     ICQC,R 
   - Local Name: LZ 8
   - Year of Accession: 2002
List received in 2018   Reference
• Accession: 22076
   - Local Name: LZ-8
   - Year of Accession: 2007
List received in 2011   Reference
• Local Name: LZ 8

Resistant (Field Reaction).
 Butler, D.R. et al., 1998
Tolerant
 Sreenivasan, T.N., 1987

Pod Index: 30.5 (pods per kg dried beans)
 Reference

Colour: purple
Shape: ovate
Number: 40.0
Total Wet Weight: 50.9 g
Cotyledon Dry Weight: 0.82 g
Cotyledon Length: 21.2 mm
Cotyledon Width: 11.6 mm
 Reference

Testa: 6.40 %
 Reference

Shape: elliptical
Basal Constriction: moderate
Apex Form: mammillate
Rugosity: moderate
Length: 142.0 mm
Breadth: 76.0 mm
Colour: anthocyanin absent
Hardness: moderate
Note: Hardness > 1.6 and <= 2.0 Mpa
 Reference

Accession: RUQ 1231
Light Saturated Photosynthetic Rate: 7.05 μmol m2 s-1
Stomatal Conductance: 0.16 mol m2 s-1
Transpiration Rate: 1.72 mmol m2 s-1
Intrinsic Water Use Efficiency: 55.28 μmol mol-1
Instantaneous Water Use Efficiency: 4.84 mmol mol-1
Flush Size: 4
Leaf Area: 292.80 cm2
Leaf Dry Weight: 1.86 g
Specific Leaf Area: 158.10 cm2 g-1
 Reference

Colour: slight anthocyanin
 Reference

Ligule Colour: slight anthocyanin
Stamen Colour: moderate anthocyanin
Sepal Length: 9.08 mm
Ligule Width: 2.84 mm
Ovule Number: 43
Style Length: 2.26 mm
Pedicel Colour: red
 Reference

Pound, F.J. (1943) First report on the selection of cacao trees for resistance to Witches' Broom disease. Unpublished report, Ministry of Agriculture, Trinidad.
Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.
CRU (2011) ICG,T accessions. CRU website.
Butler, D.R., Iwaro, A.D., Thevenin, J.-M., Bekele, F., Sounigo, O., Christopher, Y. & Mooledhar, V. (1998) Individual Institute Reports - Trinidad & Tobago, CRU. Report on the IPGRI project: Cocoa Germplasm Utilisation and Conservation, A Global Approach. Appendix to General Progress Report of Year 1.
Sreenivasan, T.N. (1987) ICGT Germplasm at Marper Farm showing freedom from cushion Brooms and vegetative brooms. Unpublished report, CRU, Trinidad and Tobago.
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.