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MO 20 Group Name 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: river MOrona.
Collected by Pound.
Location: R. Morona, Peru.

Pound, 1938a [POU38A]. Fruit - Short, oval, warty, some types with red tint.

Notes: Collected in 1937.

Pound, 1938a [POU38A]. Pods may have been collected from one tree with no Witches Broom infection.

Bartley, 1993a [BAR93A]. It is likely that accessions recorded with high numbers (>100?) are probably MOQ accessions since Pound, 1943b [POU43B] states that 80 plants were planted at Marper farm.

SNP/SSR Populations Images

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Synonyms: MORONA 20

NOTES

August 2006. The accession held by this name at the University of Reading Cocoa Quarantine Centre is now known to have been mislabelled.

PEDIGREE DETAILS

Father to:: AX 551 Lockwood, G. & Gyamfi, M.M.O., 1979

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.
Notes

Ghana - CRIG Datafile: PROGENY_ Catalogue of the material held in Ghana together with notes on the origins and usages of code names.

POPULATION

Motamayor, J.C. et al., 2008: 'Nacional' Population; Subgroup: 'Morona' Reference

Reference

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
Population SSR

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United Kingdom, International Cocoa Quarantine Centre, Reading (ICQC,R): Current List ICQC,R Website; • Accession: RUQ 1566 ICQC,R; - Local Name: MO 20; - Year of Accession: 2005
Brazil, Comissão Executiva do Plano da Lavoura Cacaueira/Centro de Pesquisas do Cacau (CEPLAC/CEPEC): List received in 2012 Reference

Reference

CEPEC 2012
Accession list for the CEPEC (Bahia, Brazil) collection. Dr. José Luis Pires, personal communication, February 2012.; • Accession: 997; - Local Name: MO 20
Brazil, Comissao Executiva do Plano da Lavoura Cacaueira (CEPLAC): List received in 1997 Reference

Reference

Brazil - Almirante Cacao 1997
Cocoa Germplasm Importation Lists 1994 - 1997. Unpublished list supplied by Martin Aitken.; • Local Name: MO 20; - Year of Accession: 1997
Brazil, Mars Center for Cocoa Science: List received in 2012 Reference

Reference

Mars Center for Cocoa Science 2012
Accession list for the Mars Center for Cocoa Science. Jean-Philippe Marelli, personal communication, February 2012.; • Local Name: MO-20; - Year of Accession: 1997
Cameroon, Institut de Recherche Agricole pour le Développement (IRAD): List received in 1999 Reference

Reference

Eskes, A.B. 1999
Advanced Draft. Working Procedures and Recording Sheets for the CFC/ICCO/IPGRI Project. CFC/ICCO/IPGRI Cocoa Project.; • Local Name: MO 20
Costa Rica, Centro Agronómico Tropical de Investigación y Enseñanza (CATIE): List received in 2018 Reference

Reference

Allan Mata 2018
Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.
Notes

Excel file received by email.; • Accession: 22232; - Local Name: MO-20; - Year of Accession: 2015
Ghana, Cocoa Research Institute of Ghana (CRIG): List received in 2012 Reference

Reference

CRIG 2012
Cocoa accessions held in the Cocoa Research Institute of Ghana (CRIG). Francis Kwame Padi, personal communication, February 2012.; • Local Name: MO20; - Year of Accession: 1998
India, Kerala Agricultural University: List received in 1997 Reference

Reference

India - Kerala 1997
List of survivng clones from all the introductions. R.V. Nair, Kerala Agricultural University, India. Personal Communication.; • Local Name: MO 20; - Year of Accession: 1996
Trinidad and Tobago, International Cocoa Genebank, Trinidad (ICG,T): List received in 2011 Reference

Reference

CRU 2011
ICG,T accessions. CRU website.
Notes

Website visited 12th April 2011

Link Unavailable [http://sta.uwi.edu/cru/icgt-accessions.asp]; • Local Name: MO 20; - Year of Accession: 1938
United States of America, USDA-TARS: List received in 2016 Reference

Reference

USDA, ARS Tropical Agriculture Research Station, Mayaguez, Puerto Rico. 2016
List of cocoa accessions held at Mayaguez in April 2016. USDA-ARS GRIN-Global. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.
Notes

Original link: https://npgsweb.ars-grin.gov/gringlobal/view2.aspx?dv=web_site_taxon_accessionlist¶ms=:taxonomyid=101885;:siteid=7 (not working)

npgsweb.ars-grin.gov/gringlobal/...; • Accession: PI 668476 GRIN-Global; - Local Name: MO 20; - Year of Accession: 2008; • Accession: TARS 16729 GRIN-Global; - Local Name: MO 20; - Year of Accession: 1970
United States of America, USDA-SHRS: List received in 2010 Reference

Reference

USDA-ARS, SHRS, NCGR, National Germplasm Repository, Miami, Florida, USA. 2010
List of cocoa accessions held at Miami and Coconut Grove (Plant Introduction Station) in July, 2010. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN). [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.
Notes

Website visited 8th July 2010.

Link Unavailable [http://www.ars-grin.gov/cgi-bin/npgs/html/tax_site_acc.pl?MAY%20Theobroma%20cacao]; • Accession: MIA 35769 GRIN-Global; - Local Name: MO 20; - Year of Accession: 2002

DISEASE

Ceratocystis: Susceptible (Branch).; Note: Based on mycelium growth and the production of perithecia..; Stela Dalva Vieira Midlej Silva, 2003

Reference

Stela Dalva Vieira Midlej Silva 2003
Ensaios Para Avaliação do Cacaueiro à Murcha-de-Ceratocystis na Bahia, Brasil. In: Proceedings of the 14th International Cocoa Research Conference, Accra, Ghana (October 2003). Cocoa Producers' Alliance, Lagos, Nigeria.
Notes

Title: 'Essays for the Assesment of Ceratocystis-Wilt in Bahia, Brazil'

Disease

YIELD

Frances Bekele & Gillian Bidaisee, 2022: Pod Index: 30.0 (pods per kg dried beans); Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

BEAN

Frances Bekele & Gillian Bidaisee, 2022: Colour: purple; Shape: elliptical; Number: 34.0; Total Wet Weight: 46.4 g; Cotyledon Dry Weight: 0.98 g; Cotyledon Length: 22.2 mm; Cotyledon Width: 10.0 mm; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

BUTTERFAT

Frances Bekele & Gillian Bidaisee, 2022: Testa: 4.90 %; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

FRUIT

Frances Bekele & Gillian Bidaisee, 2022: Shape: elliptical; Basal Constriction: slight; Apex Form: obtuse; Rugosity: moderate; Length: 173.0 mm; Breadth: 83.0 mm; Colour: anthocyanin absent; Hardness: hard; Note: Hardness > 2.0 Mpa; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

PHENOTYPING

Fiona Lahive, 2017: Accession: RUQ 1566; Light Saturated Photosynthetic Rate: 7.23 μmol m² s^-1; Stomatal Conductance: 0.09 mol m² s^-1; Transpiration Rate: 1.47 mmol m² s^-1; Intrinsic Water Use Efficiency: 81.85 μmol mol^-1; Instantaneous Water Use Efficiency: 4.90 mmol mol^-1; Flush Size: 5; Leaf Area: 317.90 cm²; Leaf Dry Weight: 2.12 g; Specific Leaf Area: 149.80 cm² g^-1; Reference

Reference

Fiona Lahive 2017
Phenotypic data from climate change trials. Personal communication.
Notes

Data for single trees in ICQC,R. Each value is a mean of 2 time points with 6 leaves per tree (12 measurements), except flush size, which was 2 branches per tree (4 measurements).

Phenotyping

FLUSH

Frances Bekele & Gillian Bidaisee, 2022: Colour: anthocyanin absent; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

LEAF

Trinidad - ICGT, 1992: Distance from Base to Widest Part: 131 mm; Length: 238.0 mm; Width: 81.0 mm; Length to Width Ratio: 2.90; Basal Angle: 120.1 °; Apical Angle: 65.5 °; Petiole Length: 20 mm; Pulvinus Length: 12 mm; Reference

Reference

Trinidad - ICGT 1992
Leaf descriptors. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.
Notes

Trinidad - International Cocoa Genebank, CRU, University of the West Indies.
Flower descriptor data is presented for 620 clones, fruit descriptor data of 333 and seed characters of 118 clones are partly described. Leaf descriptor data is presented for 229 clones. The germplasm is mainly of Peruvian, Ecuadorian and Colombian origin. Environment: Each clone is represented in the collection by up to 16 trees planted 1.8 m apart in a block design. Shading is provided by Erythrina sp. (spaced 60m apart) and bananas (spaced 4m apart). Fertilizer, N-P-K (15:10:5), is provided twice a year at 250g per tree. Cyclic irrigation is performed from February to May (10 l of water per plant/week). Soil type group -33 A 1 Soil Series - Cunupia fine sandy clay with restricted internal drainage Lithology - silty clay alluvium Drainage - imperfect Slope category - 0°-2° Meterological data are given in this table as mean maximum, mean minimum and overall mean temperature and mean total rainfall per month over the period 1961-1990. Month Temp. (°C) Rainfall Max Min Mean (mm) January 30.1 20.8 24.6 71.2 February 30.2 20.8 25.0 43.3 March 31.2 21.4 25.7 36.6 April 31.8 22.3 26.5 51.1 May 31.6 23.3 26.9 116.5 June 30.6 23.3 26.4 252.1 July 30.8 23.0 26.2 266.3 August 31.2 22.9 26.4 250.1 September 31.5 22.8 26.5 202.5 October 31.4 22.82 6.41 99.3 November 30.8 22.4 25.9 227.8 December 30.2 21.5 25.2 155.6 Descriptors: The character selection is based on the IBPGR list (IBPGR, 1981 [IBP81A]). Where descriptor states present real measurements, e.g. pod length in cm, the data are given as the mean of all the measurements ± the standard deviation. For some descriptors, such as Leaf, flush colour, the phenotypic expression of the character is coded on a scale from 0 to 9. On this scale '0' represents the lowest or weakest expression of a characteristic and '9' represents the highest or strongest. Leaf and Flower Characteristics p.300-307

Leaf

FLOWER

Frances Bekele & Gillian Bidaisee, 2022: Ligule Colour: slight anthocyanin; Stamen Colour: anthocyanin absent; Sepal Length: 7.99 mm; Ligule Width: 3.08 mm; Ovule Number: 39; Style Length: 2.30 mm; Pedicel Colour: reddish; Reference

Reference

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.
Notes

This single reference supercedes data entered previously and will be kept up-to-date to allow this information to be grouped together.

Yield Bean Butterfat Fruit Flush Flower

REFERENCES

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.

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.

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.

Brazil - Almirante Cacao (1997) Cocoa Germplasm Importation Lists 1994 - 1997. Unpublished list supplied by Martin Aitken.

Mars Center for Cocoa Science (2012) Accession list for the Mars Center for Cocoa Science. Jean-Philippe Marelli, personal communication, February 2012.

Eskes, A.B. (1999) Advanced Draft. Working Procedures and Recording Sheets for the CFC/ICCO/IPGRI Project. CFC/ICCO/IPGRI Cocoa Project.

Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.

CRIG (2012) Cocoa accessions held in the Cocoa Research Institute of Ghana (CRIG). Francis Kwame Padi, personal communication, February 2012.

India - Kerala (1997) List of survivng clones from all the introductions. R.V. Nair, Kerala Agricultural University, India. Personal Communication.

CRU (2011) ICG,T accessions. CRU website.

USDA, ARS Tropical Agriculture Research Station, Mayaguez, Puerto Rico. (2016) List of cocoa accessions held at Mayaguez in April 2016. USDA-ARS GRIN-Global. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.

USDA-ARS, SHRS, NCGR, National Germplasm Repository, Miami, Florida, USA. (2010) List of cocoa accessions held at Miami and Coconut Grove (Plant Introduction Station) in July, 2010. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN). [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.

Stela Dalva Vieira Midlej Silva (2003) Ensaios Para Avaliação do Cacaueiro à Murcha-de-Ceratocystis na Bahia, Brasil. 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.

Trinidad - ICGT (1992) Leaf descriptors. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.