Evaluation of early vigour of wild cocoa from the Amazon Region of Ecuador

Allen J.B., . (1986) Evaluation of early vigour of wild cocoa from the Amazon Region of Ecuador. [Proceedings Paper]

To evaluate the vigour of wild cocoa genotypes collected by the London Cocoa Trade Amazon Project LCTAP in the Amazon Region of Ecuador stem diameters of 405 trees from 52 collections were measured at 90-day intervals over a period of 2 years. An average growth rate for each collection was calculated by fitting an exponential growth function to the data for the first year. During the second year there was a reduction in growth rate for which the exponential model was unsatisfactory. Growth rates for the collections showed a continuous approximately normal distribution in the range 0.0018 to 0.0032 mm/mm/day. There were statistically significant differences among the collections and also between trees within collections. The calculated growth rates were used to rank the collections in order of vigour. This ranking was intended to aid breeders in the selection of material from the LCTAP collection

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Abstract

To evaluate the vigour of wild cocoa genotypes collected by the London Cocoa Trade Amazon Project LCTAP in the Amazon Region of Ecuador stem diameters of 405 trees from 52 collections were measured at 90-day intervals over a period of 2 years. An average growth rate for each collection was calculated by fitting an exponential growth function to the data for the first year. During the second year there was a reduction in growth rate for which the exponential model was unsatisfactory. Growth rates for the collections showed a continuous approximately normal distribution in the range 0.0018 to 0.0032 mm/mm/day. There were statistically significant differences among the collections and also between trees within collections. The calculated growth rates were used to rank the collections in order of vigour. This ranking was intended to aid breeders in the selection of material from the LCTAP collection

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB267 I61 1984 Call Number
AGROVOC Term:	THEOBROMA CACAO
AGROVOC Term:	VIGOR HIBRIDO
AGROVOC Term:	SELECCION
AGROVOC Term:	ECUADOR/ EVALUACION
AGROVOC Term:	GENOTIPOS
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14431

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