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B 6 /3 [POU]    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 Unpublished report, Ministry of Agriculture, Trinidad.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: Balao.
Collected by Pound.
Location: Dept. of Agriculture, ECU.

Notes:  Progeny from Hda. Balao, Ecuador planted in Trinidad 1939-41.

10/09/96 Previously recorded in the ICGD and elsewhere that B stood from Bolivar but this was found to be incorrect when Pound's 1943 report was re-discovered.

Pound, 1943b [POU43B]. Progeny were obtained from the following trees or combinations of trees: 1+2, 3,4,5,6,7,8,9+10,11,12,13, 14,15,16,17,18,20,21,22 and 23.


 

Synonyms: BALAO 6 /3 [POU]

 NOTES

Progeny from Hda. Balao, Ecuador planted in Trinidad 1939-41. 10/09/96 Previously recorded in the ICGD and elsewhere that B stood from Bolivar but this was found to be incorrect when Pound's 1943 report was re-discovered. Pound, 1943b [POU43B]. Progeny were obtained from the following trees or combinations of trees: 1+2, 3,4,5,6,7,8,9+10,11,12,13, 14,15,16,17,18,20,21,22 and 23.

 HELD IN

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Current List   ICQC,R Website
• Accession: RUQ 1595     ICQC,R 
   - Local Name: B 6/3 [POU]
   - Year of Accession: 2006
List received in 2018   Reference
• Accession: 22120
   - Local Name: B-6/3 [POU]
   - Year of Accession: 2012
List received in 2011   Reference
• Local Name: B 6/3 [POU]

 DISEASE

 Phytophthora
Moderate Resistance, sp. P. palmivora (Pod).
Note: Score: 3 (1-8 Scale). Fully grown, unripe detached pods (4-5 months old).
 A.D. Iwaro et al., 2006
Resistant, sp. P. palmivora (Pod).
Note: Fully grown, unripe detached pods (4-5 months old)
 A.D. Iwaro & D. R. Butler, 2003

 YIELD

 Frances Bekele & Gillian Bidaisee, 2016
Pod Index: 47.4 (pods per kg dried beans)
 Reference

 BEAN

 Frances Bekele & Gillian Bidaisee, 2016
Colour: dark purple
Shape: oblong
Number: 19.0
Total Wet Weight: 33.2 g
Cotyledon Dry Weight: 1.11 g
Cotyledon Length: 22.9 mm
Cotyledon Width: 12.5 mm
 Reference

 FRUIT

 Frances Bekele & Gillian Bidaisee, 2016
Shape: obovate
Basal Constriction: moderate
Apex Form: indented
Rugosity: intense
Length: 132.0 mm
Breadth: 81.0 mm
Colour: anthocyanin absent
Note: Pod wall hardness > 1.6 MPa ? 2.0 MPa
 Reference

 PHENOTYPING

 Fiona Lahive, 2017
Accession: RUQ 1595
Light Saturated Photosynthetic Rate: 4.94 μmol m2 s-1
Stomatal Conductance: 0.11 mol m2 s-1
Transpiration Rate: 1.46 mmol m2 s-1
Intrinsic Water Use Efficiency: 48.98 μmol mol-1
Instantaneous Water Use Efficiency: 3.45 mmol mol-1
Flush Size: 6
Leaf Area: 262.40 cm2
Leaf Dry Weight: 1.71 g
Specific Leaf Area: 153.90 cm2 g-1
 Reference

 FLOWER

 Frances Bekele & Gillian Bidaisee, 2016
Ligule Colour: slight anthocyanin
Stamen Colour: intense anthocyanin
Sepal Length: 9.19 mm
Ligule Width: 2.67 mm
Ovule Number: 45
Style Length: 2.48 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.
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
A.D. Iwaro & D. R. Butler (2003) Sources of Resistance to Phytophthora Pod Rot at the International Cocoa Genebank, Trinidad . In: Proceedings of the 14th International Cocoa Research Conference, Accra, Ghana (October 2003). Cocoa Producers' Alliance, Lagos, Nigeria.
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.
Fiona Lahive (2017) Phenotypic data from climate change trials.. Personal communication.