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Abstract Detail


Economic Botany: Evolution of Cultivated Plants

Petersen, Jennifer J. [1], Parker, Ingrid M. [2], Potter, Daniel [3].

Domestication Processes, Genetic Variation and Anthropogenic factors of a tropical fruit tree Chrysophyllum cainito (Sapotaceae).

The evolutionary processes of domestication of temperate annual and perennial crops are well understood; domestication often results in a reduction in genetic variation in cultivated crops compared to their wild counterparts along with global or localized reductions in phenotypic variation in domesticated or cultivated crops due to human mediated selection, drift and genetic bottlenecks. Evolutionary processes of domestication of tropical perennial crops, specifically fruit trees, are not presently well understood and levels of human selection and genetic variation in cultivated versus wild trees have not been widely studied. Chrysophyllum cainito (Sapotaceae), commonly known as caimito or star apple, is cultivated throughout the Antilles, Central and South America for its ornamental value and edible fruit. It is reported by some authors to be native to the Greater Antilles and to have become naturalized in Central and South America while others believe it to be a native species in dry forests of Panama. The goals of this study are to document genetic variation using DNA sequence data and microsatellite markers in cultivated and wild trees of the tropical tree, C. cainito sampled across its present day range in order to understand how evolutionary processes, including the impacts of human mediated selection, affect its current distribution patterns. These molecular data, along with linguistic information and ethnobotanical interviews, are used to understand the current and historic range of wild C. cainito populations and the locations and number of times that C. cainito was brought into cultivation. Additionally the levels of conscious human mediated selection are described across geographic and cultural boundaries.


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1 - University of California Davis, Department of Plant Sciences, One Shields Avenue, Mail Stop 2, Davis, CA, 95616, USA
2 - University of California, Department of Ecology and Evolutionary Biology, Earth & Marine Sciences Bldg., Santa Cruz, California, 95064, USA
3 - University of California, Davis, Department of Plant Sciences, Mail Stop 2, One Shields Avenue, University of California, Davis, California, 95616, USA

Keywords:
Sapotaceae
Caimito
domestication
phylogeography.

Presentation Type: Oral Paper:Papers for Topics
Session: CP03
Location: Lake Ontario/Hilton
Date: Monday, July 9th, 2007
Time: 9:00 AM
Number: CP03005
Abstract ID:2160


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