Utilization of cocoa germplasm in breeding for yield

Lockwood, G.; Pang, J.T.Y.

Utilization of cocoa germplasm in breeding for yield

1993

Lockwood, G. (Commonwealth Development Corporation, London (United Kingdom)) | Pang, J.T.Y.

In five progeny trials with 26 Upper Amazon and 11 Trinitario parents, inheritance of yield was additive. Inter Upper Amazon crosses outyielded a commercially proven Upper Amazon x Trinitario control but no improvement was obtained with Upper Amazon x Trinitario crosses. Yields of 15 clones showed a strong interaction with planting densities of 1096 and 3333 points/ha. Results show that the relationship between the yield of a clone and its GCA for yield is dependent upon the planting density of both clones and progenies. Yield improvement can be obtained by recurrent selection, with alternating cycles of clone and progeny trials, and beginning with a broad genetic base.

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Mots clés AGROVOC

clone clones descendance ensayos de variedades germoplasma progenie rendement des cultures rendimiento de cultivos theobroma cacao

Informations bibliographiques

Editeur

West Indies Univ. Cocoa Research Unit

D'autres materias

Materiel genetique; Selection recurrente; Essai de variete; Seleccion recurrente

Langue

anglais

Note

Summary (En)

10 tables; 37 ref.

Type

Conference; Summary; Non-Conventional

Source

International workshop on conservation, characterization and utilization of cocoa genetic resources in the 21st Century - Proceedings. 13-17 Sep. 1992, Port-of-Spain, Trinidad and Tobago, West Indies Univ., St. Augustine (Trinidad and Tobago). Cocoa Research Unit.- St. Augustine (Trinidad and Tobago): West Indies Univ. Cocoa Research Unit, 1993. p. 198-214

Conférence

International Workshop on Conservation, Characterisation and Utilisation of Cocoa Genetic Resources in the 21st Century, Port-of-Spain (Trinidad and Tobago), 13-17 Sep 1992

Sur AGRIS depuis: 1996-08-15

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Utilization of cocoa germplasm in breeding for yield

1993

Mots clés AGROVOC

Informations bibliographiques