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SNK 12    Theobroma cacao

 Braudeau, J. (1958)
The selection and multiplication of clones at Nkoemvone. Proceedings of the 1957 Cocoa Conference, London. Cocoa, Chocolate and Confectionery Alliance, London, U.K. pp. 59-64.

Derivation: Selection N'Koemvone.
Collected by Braudeau.
Location: Nkoemvone, Cameroon.

Notes:  1949-1960.

Braudeau, 1958 [BRA58A]. Trees were selected primarily for their yield but also for precocity, regularity of bearing and bean size.
 

 NOTES

Bartley, 1998a [BAR98A] Almost the lowest yielding clone in Brazil.

 RECOMMENDED PLANTING MATERIAL    Disclaimer

 Efombagn Mousseni, Ives Bruno et al., 2009
Recommended seed parent in:
Cameroon
Male-only Parent in Seed Garden with: SNK 10   |  SNK 13   |  SNK 48   |  SNK 64   |  SNK 109   |  ICS 43   |  ICS 46   |  ICS 60   |  T 79 /467 [POS]   |  SNK 37   |  SNK 450 
Year: pre-1980
 Reference

 PEDIGREE DETAILS

 Father to:
AHK 34    Bartley, B.G.D., 1998

 HELD IN

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List received in 2012   Reference
• Accession: 359
   - Local Name: SNK 12
   - Year of Accession: 1978
List received in 1985   Reference
• Local Name: SNK 12
List received in 2018   Reference
• Accession: 10504
   - Local Name: SNK-12
   - Year of Accession: 1965
List received in 1989   Reference
• Local Name: SNK 12
   - Year of Accession: 1965
List received in 1987   Reference
• Local Name: SNK 12
   - Year of Accession: 1974
List received in 2011   Reference
• Local Name: SNK-12
List received in 1998   Reference
• Local Name: SNK 12
List received in 1991   Reference
• Local Name: SNK 12
List received in 2011   Reference
• Local Name: SNK 12
   - Year of Accession: 1966
List received in 2016   Reference
• Accession: PI 315333     GRIN-Global 
   - Local Name: SNK 12
   - Year of Accession: 1939
• Accession: TARS 16842 B     GRIN-Global 
   - Local Name: SNK 12
   - Year of Accession: 1939

 DISEASE

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 Phytophthora
15.91 % Infection (Pod).
Note: percentage of infected pods. Rank calculated using Newman-Keuls test at 5% = A
 Sounigo, O. et al., 1995
Resistant
 Butler, D.R. et al., 1998
Intermediate, sp. P. palmivora (Pod).
 Togo - IRCC Togo, 1986
Moderate Resistance, 83.00 % Infection, sp. P. palmivora (Pod).
Note: Unripe, Attached and not wounded
 Blaha, G. & Lotode, R., 1976
Resistant, sp. P. palmivora
Note: Artificial reaction to black pod (Paper Disc Method). Rated as Highly Resistant
 Wilbert Phillips et al., 2009
Susceptible, sp. P. palmivora (Pod).
 Clement, D. & Sounigo, O., 1992
Susceptible, sp. P. palmivora (Leaf).
 Kebe, 1999
Tolerant, sp. P. palmivora (Pod).
 Enriquez, G. & Soria, V.J., 1977
 Witches Broom
Resistant (Field Reaction).
 Butler, D.R. et al., 1998

 PESTS

 Mirids
High Damage
Note: Trial D13/4. Rank calculated using Newman-Keuls test at 5% = ABC
 Sounigo, O. et al., 1995
High Damage
 N'Goran, J.A.K. et al., 1993

 YIELD

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 Frances Bekele & Gillian Bidaisee, 2022
Pod Index: 20.5 (pods per kg dried beans)
 Reference
 Costa Rica - CATIE, 1981
Seed Index: 60.6 (dried beans per 100g)
Productivity: very low - low
 Reference
 Sounigo, O. et al., 1995
Yield: 388 kg ha-1 yr-1
 Reference

 BEAN

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 Frances Bekele & Gillian Bidaisee, 2022
Colour: purple
Shape: oblong
Number: 40.0
Total Wet Weight: 74.9 g
Cotyledon Dry Weight: 1.22 g
Cotyledon Length: 24.4 mm
Cotyledon Width: 13.1 mm
 Reference
 Costa Rica - CATIE, 1981
Colour Dark Purple: Present
Colour Light Purple: Absent
Colour Grey: Absent
Colour White: Absent
Colour Mottled: Absent
Number: 29.6
Maximum Number: 48
Cotyledon Wet Weight: 2.57 g
Cotyledon Dry Weight: 1.65 g
Cotyledon Length: 27.4 mm
Cotyledon Width: 13.8 mm
Cotyledon Thickness: 9.6 mm
 Reference
 KKO, 1993
Colour: purple
Shape: flat
Size: medium
 Reference

 BUTTERFAT

 Frances Bekele & Gillian Bidaisee, 2022
Testa: 5.80 %
 Reference

 FRUIT

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 Frances Bekele & Gillian Bidaisee, 2022
Shape: elliptical
Basal Constriction: moderate
Apex Form: attenuate
Rugosity: moderate
Length: 174.0 mm
Breadth: 88.0 mm
Colour: moderate anthocyanin
Hardness: hard
Note: Hardness > 2.0 Mpa
 Reference
 Brazil - CEPEC, 1987
Rugosity: intense
 Reference
 Costa Rica - CATIE, 1981
Basal Constriction: very slight
Apex Form: slightly acute
Rugosity: moderate
Husk Thickness: 12.25 mm (15.6 - 8.9)
Length: 210.0 mm
Breadth: 104.0 mm
Colour: high / moderate anthocyanin (ridge/furrow)
Weight: 1006.0 g
Pods Per Tree: 2
Hardness: hard
Length Breadth Ratio: 2.01
Note: ratio of distances between ridges within a pair and between ridges of two different pairs = 0.91
 Reference
 KKO, 1993
Shape: angoleta
Rugosity: warty
 Reference
 Morera, J. et al., 1991
Shape: amelonado
Colour: red
 Reference

 FLUSH

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 Frances Bekele & Gillian Bidaisee, 2022
Colour: anthocyanin absent
 Reference
 Costa Rica - CATIE, 1981
Colour: reddish brown
 Reference
 KKO, 1993
Colour: red
 Reference

 LEAF

 Trinidad - ICGT, 1992
Distance from Base to Widest Part: 138 mm
Length: 269.0 mm
Width: 101.0 mm
Length to Width Ratio: 2.70
Basal Angle: 142.6 °
Apical Angle: 96.6 °
Petiole Length: 27 mm
Pulvinus Length: 15 mm
 Reference

 FLOWER

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 Frances Bekele & Gillian Bidaisee, 2022
Ligule Colour: slight anthocyanin
Stamen Colour: anthocyanin absent
Sepal Length: 7.68 mm
Ligule Width: 2.50 mm
Ovule Number: 41
Style Length: 2.28 mm
Pedicel Colour: red
 Reference
 Brazil - CEPEC, 1987
Self Compatibility: self compatible
 Reference
 Costa Rica - CATIE, 1981
Ligule Colour: intense anthocyanin (apical)
Stamen Colour: anthocyanin absent
Sepal Colour: greyish green
Sepal Width: 2.54 mm
Sepal Length: 9.39 mm
Ligule Length: 10.31 mm
Ligule Width: 2.96 mm
Ovary Colour: slight anthocyanin (apical)
Ovary Width: 1.19 mm
Ovary Length: 1.66 mm
Style Length: 2.64 mm
Staminode Length: 7.97 mm
Pedicel Colour: greyish red
Self Compatibility: self compatible
Note: Translation of Methuen colour codes.
 Reference
 A. González & M. Ventura, 2007
Self Compatibility: self incompatible
 Reference
 KKO, 1993
Self Compatibility: self incompatible
 Reference
 Morera, J. et al., 1991
Self Compatibility: self incompatible
 Reference

Braudeau, J. (1958) The selection and multiplication of clones at Nkoemvone. Proceedings of the 1957 Cocoa Conference, London. Cocoa, Chocolate and Confectionery Alliance, London, U.K. pp. 59-64.
Efombagn Mousseni, Ives Bruno, Olivier Sounigo, Albertus B Eskes, Juan-Carlos Motamayor, Maria J Manzanares-Dauleux, Raymond J Schnell & Salomon Nyassé (2009) Parentage Analysis and Outcrossing Patterns in Cacao (Theobroma Cacao L.) Farms in Cameroon. Heredity 103 (1): 46–53
Bartley, B.G.D. (1998) Comments made by Dr. Bartley during his visit to Reading (19th - 31st July 1998). B.G.D. Bartley. Personal Communications.
CEPEC (2012) Accession list for the CEPEC (Bahia, Brazil) collection. Dr. José Luis Pires, personal communication, February 2012.
Cameroon - IRAD Cameroun (1985) Collection Camerounaise de cacaoyers (situation en Juillet, 1985). Unpublished report, IRCC Cameroun. Supplied by A.B. Eskes, IRCC Montpellier.
Allan Mata (2018) Accession list for the International Cacao Collection at CATIE (IC3). Personal communication.
Cote d'Ivoire - IRCC (1989) Liste des clones en collection. Unpublished Report, IRCC Bingerville, Cote d'Ivoire, Doc. No. 192. D. Clement, IRCC, Cote d'Ivoire. Personal Communication.
Dominican Republic - CDC (1987) Informe de los trabajos de indentificacion clonal realizados por el Dr. B.G.Bartley durante su visita a la Estacion "Mata Larga". Unpublished of the Comision del Cacau, Dominican Republic. pp 14
IDIAF (2011) Cocoa accessions held in the Dominican Institute for Agriculture and Forestry Research (IDIAF). M. Ventura, personal communication, September 2011.
Malaysia - ARC Tuaran (1998) List of Imported Clones of the Malaysian Cocoa Board, January 1998. K. Lamin, MCB, Malaysia, Personal Communication.
Togo - IRCC Togo (1991) Collection des clones de cacaoyers presents au Togo. Unpublished report, IRCC Togo, p.1.
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.
Sounigo, O., N'Goran, J., Coulibaly, N., Clement, D. & Lachenaud, P. (1995) Evaluation de clones de cacaoyers pour la productivite, la resistance aux mirides et la resistance a la pourriture des cabosses. In: Proceedings of the 11th International Cocoa Research Conference, Yammoussoukro, Cote d'Ivoire, 1993. Cocoa Producers' Alliance, Lagos, Nigeria. pp. 375-381.
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.
Togo - IRCC Togo (1986) Collection de cacaoyers. Composition au 1er Janvier, 1986. IRCC Togo. A.B. Eskes, IRCC, Montpellier, France. Personal Communication.
Blaha, G. & Lotode, R. (1976) Un critere primordial de selection du cacaoyer au Cameroun: la resistance a la pourriture brune des cabossees ( Phytophthora palmivora ). Cafe, Cacao, The 20(2): pp. 97-116.
Wilbert Phillips, José Castillo, Adriana Arciniegas, Allan Mata, Aldo Sánchez, Mariela Leandro, Carlos Astorga, Juan Motamayor, Bill Guyton, Ed Seguine & Ray Schnell (2009) Overcoming the Main Limiting Factors of Cacao Production in Central America through the use of Improved Clones Developed at CATIE. In: Proceedings of the 16th International Cocoa Research Conference, Bali, Indonesia (November 2009). Cocoa Producers' Alliance, Lagos, Nigeria.
Clement, D. & Sounigo, O. (1992) Ivory Coast Database. D. Clement & O. Sounigo, IRCC, Bingerville, Cote d'Ivoire. Personal Communication.
Kebe (1999) Data from Cote d'Ivoire on black pod resistance. Kebe, report on CAOBISCO project. Forwarded to ICGD by Dr. A.B.Eskes, IPGRI.
Enriquez, G. & Soria, V.J. (1977) Mejoramiento genético para resistencia a cinco enfermedades del cacao. In: Proceedings of the 6th International Cocoa Research Conference, Caracas, Venezuela, 1977. Cocoa Producers' Alliance, Lagos, Nigeria. pp. 45-56.
N'Goran, J.A.K., Lachenaud, P., Bastide P., & Paulin, D. (1993) Cocoa germplasm conservation initiatives in Cote d'Ivoire. In: Proceedings of the International Workshop on Conservation, Characterisation and Utilisation of Cocoa Genetic Resources in the 21st Century. CRU, UWI, Trinidad. pp. 221-227.
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.
Costa Rica - CATIE (1981) Genetic Resources of Cacao. A Catalogue of the CATIE Collection. J.M.M. Engels, Tropical Agricultural Research and Training Centre, CATIE, Turrialba, Costa Rica. Technical Bulletin No. 7: pp. 191.
KKO (1993) Information from the KKO cocoa germplasm database. Information supplied on computer diskette by C. Cilas, CIRAD-CP, France.
Brazil - CEPEC (1987) List of clones in the CEPEC, Bahia, Brazil collection. Computer printout from CEPEC. Supplied by B.G.D. Bartley, CEPEC, Brazil.
Morera, J., Paredes, A. & Mora, A. (1991) Germoplasma de cacao en el CATIE entre 1947 y 1991, Programa II: Generacion y transferencia de tecnologia. IICA, San Jose, Costa Rica, pp. 49.
Trinidad - ICGT (1992) Leaf descriptors. Unpublished data supplied on computer diskette by International Cocoa Genebank, Trinidad, University of the West Indies, Trinidad.
A. González & M. Ventura (2007) Autocompatibilidad Sexual de Clones de Cacao (Theobroma cacao L.). In: Resultados de investigación en cacao. IDIAF, 2007