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Genetic diversity and relationships of cacao (Theobroma cacao L.) in southern Mexico

Whitkus, R | Cruz, M. de la [autor/a] | Mota Bravo, L [autor/a] | Gómez Pompa, Arturo [autor/a].
Tipo de material: Artículo ArtículoTema(s): Variación genética | Theobroma cacaoDescriptor(es) geográficos: Chiapas (México) | Yucatán (México) | Tabasco (México) Clasificación: AR CH/633.74 / G4 Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Theor Appl Genet. volumen 96, número 5 (abril 1998), páginas 621-627. --ISSN: 0040-5752Número de sistema: 34205Resumen:
Inglés

Neotropical tree crops are affected by a combination of biological and human factors that complicate the study of genetic diversity and crop evolution. Genetic diversity and relationships among southern Mexican populations and horticultural collections of Theobroma cacao (chocolate, cocoa, cacao) are examined in light of the agricultural practices of the Maya. Collections of cacao were obtained from the extremes of its geographic range including archeological sites in southern Mexico where cacao was first domesticated. Genetic diversity was assayed by 57 informative random amplified polymorphic DNA (RAPD) marker loci. A unique sample of the total diversity found in this study exists in the southern Mexican populations.

These populations are significantly different from all other cacao with regards to their profile of RAPD bands, including the 'criollo' variety, their morphological and geographical group. A population of cacao found in a sinkhole (cenote) in northern Yucatan with genetic affinities to populations in Chiapas suggests the Maya maintained plants far away from their native habitat. This finding concurs with known agroforestry practices of the Maya. Modern efforts to increase germplasm of tropical tree crops such as cacao should carefully examine archeological sites where genetic diversity, either deliberately or by chance, was collected and maintained by ancient cultures.
Lista(s) en las que aparece este ítem: Patrimonio Biocultural_ Cacao VHS
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Disponible para usuarios de ECOSUR con su clave de acceso

Neotropical tree crops are affected by a combination of biological and human factors that complicate the study of genetic diversity and crop evolution. Genetic diversity and relationships among southern Mexican populations and horticultural collections of Theobroma cacao (chocolate, cocoa, cacao) are examined in light of the agricultural practices of the Maya. Collections of cacao were obtained from the extremes of its geographic range including archeological sites in southern Mexico where cacao was first domesticated. Genetic diversity was assayed by 57 informative random amplified polymorphic DNA (RAPD) marker loci. A unique sample of the total diversity found in this study exists in the southern Mexican populations. eng

These populations are significantly different from all other cacao with regards to their profile of RAPD bands, including the 'criollo' variety, their morphological and geographical group. A population of cacao found in a sinkhole (cenote) in northern Yucatan with genetic affinities to populations in Chiapas suggests the Maya maintained plants far away from their native habitat. This finding concurs with known agroforestry practices of the Maya. Modern efforts to increase germplasm of tropical tree crops such as cacao should carefully examine archeological sites where genetic diversity, either deliberately or by chance, was collected and maintained by ancient cultures. eng

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