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Yields of Cocoa Clones in Response to Planting Density in Malaysia

Published online by Cambridge University Press:  03 October 2008

G. Lockwood  and
Joe Pang Thau Yin
G. Lockwood
Affiliation:
Commonwealth Development Corporation, One Bessborough Gardens, London SWIV 2JQ.
Joe Pang Thau Yin
Affiliation:
BAL Plantations Sdn Bhd, PO Box 135, 91007 Tawau, Sabah Malaysia
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Summary

Ninety five cocoa clones were tested in Sabah, Malaysia at planting densities of 1096 and 3333 plants ha−1. Analysis of dry bean yields up to 60 months after planting showed that vigorous clones performed better at the lower planting density, some clones of intermediate vigour performed well at both planting densities and some weak clones performed well at high planting density. The conclusion that optimal planting densities are highly variable has significant implications for procedures in clone selection and suggests that the relation between the yield of a clone and its general combining ability will become clearer once planting density is taken into account.

Type
Research Article
Information
Experimental Agriculture , Volume 32 , Issue 1 , January 1996 , pp. 41 - 47
Copyright
Copyright © Cambridge University Press 1996

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References

REFERENCES

Arasu, N. T. & Phang, C. I. (1972). Cocoa improvement in West Malaysia. In Cocoa and Coconuts in Malaysia, 28–42. Kuala Lumpur: The Incorporated Society of Planters.Google Scholar
Bartley, B. G. D. (1967). Progress in cacao breeding and genetics. In Conference Internationale sur les Recherches Agronomique Cacaoyeres, 228–233. Ministere de l'Agriculture, Côte d'Ivoire.Google Scholar
Chong, C. F. & Shepherd, R. (1986). Promising Prang Besar cocoa clones. In Cocoa and Coconuts: Progress and Outlook. Proceedings of the International Conference on Cocoa and Coconuts, 3–20. Kuala Lumpur: Incorporated Society of Planters.Google Scholar
Freeman, W. E. (1969). Some aspects of the cocoa breeding programme. Proceedings of the Agricultural Society of Trinidad and Tobago, December 1968, 1–15.Google Scholar
Hart, H. J. (1902). Cacao (Second edition). Port of Spain, Mirror office.Google Scholar
Lim, D. H. K., Pang, J. T. Y., Yow, S. & Lockwood, G. (1994). Selection of cocoa genotypes for high density planting and guidelines to its management. In Proceedings of International Cocoa Conference: Challenges in the '90s, Kuala Lumpur 1991, 191–203. Malaysian Cocoa Board.Google Scholar
Lockwood, G., & Pang, Joe Thau Yin (1993). Utilisation of cocoa germplasm in breeding for yield. In Proceedings of the International Workshop on Conservation, Characterisation and Utilisation of Cocoa Genetic Resources in the 21st Century, 198–214. Trinidad: Cocoa Research Unit, University of the West Indies.Google Scholar
Martin, K. J. & Lockwood, G. (1979). Edge effects and interaction with environment in cocoa. Experimental Agriculture 15:225–239.CrossRefGoogle Scholar
Mooleedhar, V. & Lauckner, F. B. (1990). Effect of spacing on yield in improved clones of Theobroma cacao L. Tropical Agriculture (Trinidad) 67:376–378.Google Scholar
Pang, J. T. Y., Lim, D. H. K. & Lockwood, G. (1994). Clonal cocoa trials and selection for superior clones. In Proceedings of the International Cocoa Conference: Challenges in the '90s, Kuala Lumpur 1991, 38–47. Malaysian Cocoa Board.Google Scholar
Posnette, A. F. (1943). Cacao selection on the Gold Coast. Tropical Agriculture (Trinidad) 20:149–155.Google Scholar
Smith, E. S. C. & Moles, D. J. (1982). Susceptibility of clonal cocoa to attack by two insect pests in Papua New Guinea. In Proceedings of the 8th International Cocoa Research Conference, Colombia, 1981, 735–9. Lagos: Cocoa Producers' Alliance.Google Scholar
Toxopeus, H. (1969). Cacao (Theobroma cacao L). In Outlines of Perennial Crop Breeding in the Tropics Miscellaneous Papers No. 4. (Eds Ferwerda, F. P. and Wit, F.). Wageningen, The Netherlands: Landbouwhogeschool.Google Scholar
Wood, G. A. R. & Lass, R. A. (1985). Cocoa (Fourth edition). London: Longman.Google Scholar
Yapp, J. H. H. (1992). A study into the potential for enhancing productivity in cocoa (Theobroma cacao L) through exploitation of physiological and genetic variation. PhD Thesis, University of Reading, England.Google Scholar