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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 Unpublished report, Ministry of Agriculture, Trinidad.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, Ecuador.

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]


 Cornejo, O.E. et al., 2018
BioProject: PRJNA486011   NCBI   ENA FASTQ 
Project: PRJEB28591   EVA (project)   EVA (analysis) 
Library Source: Genomic
Run: SRR7774301   NCBI   ENA FASTQ 
Experiment: SRX4629523
BioSample: SAMN09934404
SampleName: B_6_3
SampleSource: Trinidad, Tree_ID: Tc17477

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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]

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

Pod Index: 47.4 (pods per kg dried beans)

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

Testa: 6.40 %

Shape: obovate
Basal Constriction: moderate
Apex Form: indented
Rugosity: intense
Length: 132.0 mm
Breadth: 81.0 mm
Colour: anthocyanin absent
Hardness: moderate
Note: Hardness > 1.6 and <= 2.0 Mpa

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

Colour: moderate anthocyanin

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: reddish

Pound, F.J. (1943) First report on the selection of cacao trees for resistance to Witches' Broom disease. Unpublished report, Ministry of Agriculture, Trinidad.
Cornejo, O.E., Muh-Ching Yee, Victor Dominguez, Mary Andrews, Alexandra Sockell, Erika Strandberg, Donald Livingstone III, Conrad Stack, Alberto Romero, Pathmanathan Umaharan, Stefan Royaert, Nilesh R. Tawari, Pauline Ng, Osman Gutierrez, Wilbert Phillips, Keithanne Mockaitis, Carlos D. Bustamante & Juan C. Motamayor (2018) Population genomic analyses of the chocolate tree, Theobroma cacao L., provide insights into its domestication process. Commun Biol 1, 167
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 (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.