Search Results

IMC 103    Theobroma cacao

 Pound, F.J. (1938)
Cacao and Witchbroom Disease of South America with notes on other species of Theobroma. . Archives of Cocoa Research 1: pp. 26-71.

Derivation: Iquitos Mixed Calabacillo (Mid Channel).
Collected by Pound.
Location: Iquitos, PER.

Pound, 1938a [POU38A]. Main type - very large lagarta calabacillo pods, oval, very smooth, normal blanco. Seeds large, flat, losenge shaped. 'Hybrid group'-large pods, somewhat warty at stem end but smooth and round like calabacillo at the apex. Third group-small, oval, warty pods, dense flowering. Bartley, 1995a [BAR95A]. The common features of this group of clones are the high ovule numbers (65+) and a specific type of anthocyanin pigmentation in the stamens and base of the corolla. Posnette, 1945a [POS45A]. Petioles are of a type intermediate between those of Nanay (see NA) and Parinari (see PA) types; the constriction is usually short and narrow.

Notes:  Pound, 1938a [POU38A]. Pods probably collected from at least two groups of trees which were free of Witches' Broom.

Bartley, 1995a [BAR95A]. They are probably the progenies of two trees, later propagated as the clones P 18 [POU] and P 21 [POU].

Pound, 1943b [POU43B]. 112 plants were planted at Marper farm.

Bartley, 1997a, [BAR97A] The progeny of the individual clones is not documented and it is important not to consider the IMC clones as one homogeneous group.
 

Synonyms: IQUITOS MIXED 103

 NOTES

Pound, 1938a [POU38A]. Pods probably collected from at least two groups of trees which were free of Witches' Broom. Bartley, 1995a [BAR95A]. They are probably the progenies of two trees, later propagated as the clones P 18 [POU] and P 21 [POU]. Pound, 1943b [POU43B]. 112 plants were planted at Marper farm. Bartley, 1997a, [BAR97A] The progeny of the individual clones is not documented and it is important not to consider the IMC clones as one homogeneous group.

 PEDIGREE DETAILS

 Father to:
GEBP 565 /A-F [ADI]    Frances Bekele, 2019
GEBP 571 /A-F [ADI]    Frances Bekele, 2019

 POPULATION

 Motamayor, J.C. et al., 2008
'Iquitos' Population
Subgroup: 'IMC II'   Reference

 HELD IN

Show Details Hide Details

Current List   ICQC,R Website
• Accession: RUQ 862     ICQC,R 
   - Local Name: IMC 103
   - Year of Accession: 1998
List received in 2012   Reference
• Accession: 1295
   - Local Name: IMC 103
List received in 2018   Reference
• Accession: 22069
   - Local Name: IMC-103
   - Year of Accession: 2007
List received in 1990   Reference
• Local Name: IMC 103
List received in 2011   Reference
• Local Name: IMC 103

 DISEASE

Show Details Hide Details

 Phytophthora
Resistant
 Butler, D.R. et al., 1998
Moderately Susceptible, sp. P. palmivora (Pod).
Note: Unripe, Unattached and not wounded
 Iwaro, D., 1998
 Witches Broom
Resistant (Field Reaction).
 Butler, D.R. et al., 1998
Tolerant
 Sreenivasan, T.N., 1987

 YIELD

 Frances Bekele & Gillian Bidaisee, 2022
Pod Index: 25.3 (pods per kg dried beans)
 Reference

 BEAN

 Bartley, B.G.D., 1970
Size: medium
 Reference
 Frances Bekele & Gillian Bidaisee, 2022
Colour: purple
Shape: oblong
Number: 44.0
Total Wet Weight: 57.3 g
Cotyledon Dry Weight: 0.90 g
Cotyledon Length: 22.1 mm
Cotyledon Width: 11.4 mm
 Reference

 BUTTERFAT

 Frances Bekele & Gillian Bidaisee, 2022
Testa: 4.50 %
 Reference
 Trinidad - CRU, 1998
Butterfat Content: 55.30 %
Testa: 7.20 %
 Reference

 FRUIT

 Bartley, B.G.D., 1970
Size: large
 Reference
 Frances Bekele & Gillian Bidaisee, 2022
Shape: obovate
Basal Constriction: slight
Apex Form: indented
Rugosity: moderate
Length: 144.0 mm
Breadth: 89.0 mm
Colour: anthocyanin absent
Hardness: hard
Note: Hardness > 2.0 Mpa
 Reference

 PHENOTYPING

 Fiona Lahive, 2017
Accession: RUQ 862
Light Saturated Photosynthetic Rate: 4.65 μmol m2 s-1
Stomatal Conductance: 0.08 mol m2 s-1
Transpiration Rate: 1.09 mmol m2 s-1
Intrinsic Water Use Efficiency: 60.92 μmol mol-1
Instantaneous Water Use Efficiency: 4.30 mmol mol-1
Flush Size: 4
Leaf Area: 275.10 cm2
Leaf Dry Weight: 1.65 g
Specific Leaf Area: 170.00 cm2 g-1
 Reference

 FLUSH

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

 LEAF

 Trinidad - ICGT, 1992
Distance from Base to Widest Part: 156 mm
Length: 330.0 mm
Width: 110.0 mm
Length to Width Ratio: 3.00
Basal Angle: 151.9 °
Apical Angle: 54.8 °
Petiole Length: 17 mm
Pulvinus Length: 15 mm
 Reference

 FLOWER

 Frances Bekele & Gillian Bidaisee, 2022
Ligule Colour: moderate anthocyanin
Stamen Colour: intense anthocyanin
Sepal Length: 7.05 mm
Ligule Width: 2.67 mm
Ovule Number: 53
Style Length: 2.26 mm
Pedicel Colour: reddish
 Reference

Pound, F.J. (1938) Cacao and Witchbroom Disease of South America with notes on other species of Theobroma. . Archives of Cocoa Research 1: pp. 26-71.
Frances Bekele (2019) Pedigree data for the GEBP clones supplied to ICQC,R (UK) by the Cocoa Research Centre (CRC), Trinidad & Tobago.. Data supplied as an Excel spreadsheet by Frances Bekele, April 2019.
Motamayor, J.C., Lachenaud, P., da Silva e Mota, J.W., Loor, R., Kuhn, D.N., Brown, J.S. & Schnell, R.J. (2008) Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L).. PLoS ONE 3(10): e3311. doi:10.1371/journal.pone.0003311
CEPEC (2012) Accession list for the CEPEC (Bahia, Brazil) collection.. Dr. José Luis Pires, personal communication, February 2012.
Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3).. Personal communication.
Malaysia - ARC Tuaran (1990) List of clones held in the Dept. of Agriculture's collection, at Sabah, Tuaran, Malaysia.. E.B. Tay, Malaysian Cocoa Board, Malaysia. 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.
Iwaro, D. (1998) Evalation of accessions for Black Pod.. Personal Communication 30th October 1998. Data sent by email from Dr. Iwaro.
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.
Bartley, B.G.D. (1970) A preliminary catalogue of the cacao germplasm held at the University of the West Indies, Trinidad.. University of the West Indies, St. Augustine, Trinidad.
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 (1992) Leaf descriptors.. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.