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Genetic variation of cassava (Manihot esculenta Crantz) cultivated by Chibchan Amerindians of Costa Rica

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Abstract

This study focuses on the genetic diversity of the cassava (Manihot esculenta Crantz) grown by the Chibchan Amerindians of Costa Rica. The authors collected cassava in various locations within two Amerindian Reserves: Talamanca, inhabited by Cabecares and Bribris, and Coto Brus, inhabited by Guaymi. Through the use of isozyme electrophoretic techniques we found variation for six out of nine systems analyzed, namely DIA, EST, IDH, MDH, PGI, and SKD. No variation was found in ADH, PGD, and PGM systems. We analyzed the distribution of variation within and between the reserves, and found most of the variation occurred within reserves (Gst = 0.1084). Only low levels of genetic differentiation were found between reserves (Nei’s genetic distance = 0.0088). The high levels of genetic variation within reserves that we found concur with results of previous studies on cassava grown by South American Amerindians and farmers. The role of the breeding system of cassava and the agricultural practices of Amerindians in the maintenance of high levels of genetic diversity are discussed.

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Authors and Affiliations

  1. Escuela de Biología, Universidad de Costa Rica, Ciudad Universitaria “Rodrigo Facio”, San Pedro, San José, Costa Rica, USA

    Maria E. Zaldivar, Oscar J. Rocha, Gabriel Aguilar, Luis Castro, Emilio Castro & Ramiro Barrantes

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  1. Maria E. Zaldivar
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  2. Oscar J. Rocha
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  3. Gabriel Aguilar
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  4. Luis Castro
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  5. Emilio Castro
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  6. Ramiro Barrantes
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Zaldivar, M.E., Rocha, O.J., Aguilar, G. et al. Genetic variation of cassava (Manihot esculenta Crantz) cultivated by Chibchan Amerindians of Costa Rica. Econ Bot 58, 204–213 (2004). https://doi.org/10.1663/0013-0001(2004)058[0204:GVOCME]2.0.CO;2

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  • DOI: https://doi.org/10.1663/0013-0001(2004)058[0204:GVOCME]2.0.CO;2

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