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Perspectivas do melhoramento do cacaueiro em Sao Tomé e Príncipe

by Bartley, B.G.D; 1. Jornadas sobre Agricultura de Sao Tomé e Príncipe Lisboa (Portugal) 9-11 Abr 1993.
Publisher: 1995ISSN: 0871-1763.Subject(s): THEOBROMA CACAO | AMELONADO | FITOMEJORAMIENTO | DIVERSIDAD GENETICA | SANTO TOME Y PRINCIPE | THEOBROMA CACAO | PLANT BREEDING | SAO TOME AND PRINCIPE | THEOBROMA CACAO | AMELIORATION DES PLANTES | SAO TOME ET PRINCIPE In: Comunicacoes. Serie de Ciencias Agrárias - Instituto de Investigacao Científica Tropical (Portugal) (no.19) p. 83-91Summary: The genetic diversity available derives from the variety originally cultivated ("Amelonado") and other types introduced at the beginning of the 20th Century and during the period 1957 to 1975. Although the islands possess areas well suited for cacao cultivation they are characterized by the ecological diversity in a small area. Such features as the topography, dependence on manual labour and imported materials require that the cultivars should possess adaptability, sustained yields which are efficient in terms of inputs and capability for cultivation under intensive systems. For this, the combination of the vegetative attributes and self-compatibility of the "Amelonado" with enhanced fruit qualities is envisaged. The procedures for attaining this objective using the available genetic materials will be discussed. Since the crop's value is relatively small it is proposed that long term activities of limited scope be conducted, these being combined with development in such a way that the gains obtained progressively will be applied, using any propagation method, for the substitution of existing fields.
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The genetic diversity available derives from the variety originally cultivated ("Amelonado") and other types introduced at the beginning of the 20th Century and during the period 1957 to 1975. Although the islands possess areas well suited for cacao cultivation they are characterized by the ecological diversity in a small area. Such features as the topography, dependence on manual labour and imported materials require that the cultivars should possess adaptability, sustained yields which are efficient in terms of inputs and capability for cultivation under intensive systems. For this, the combination of the vegetative attributes and self-compatibility of the "Amelonado" with enhanced fruit qualities is envisaged. The procedures for attaining this objective using the available genetic materials will be discussed. Since the crop's value is relatively small it is proposed that long term activities of limited scope be conducted, these being combined with development in such a way that the gains obtained progressively will be applied, using any propagation method, for the substitution of existing fields.

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