Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L)
Numerous collecting expeditions of Theobroma cacao L. germplasm have been undertaken in Latin-America. However, most of this germplasm has not contributed to cacao improvement because its relationship to cultivated selections was poorly understood. Germplasm labeling errors have impeded breeding and...
Autores principales: | , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
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Public Library of Science
2008
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2551746/ https://www.ncbi.nlm.nih.gov/pubmed/18827930 http://dx.doi.org/10.1371/journal.pone.0003311 |
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author | Motamayor, Juan C. Lachenaud, Philippe da Silva e Mota, Jay Wallace Loor, Rey Kuhn, David N. Brown, J. Steven Schnell, Raymond J. |
author_facet | Motamayor, Juan C. Lachenaud, Philippe da Silva e Mota, Jay Wallace Loor, Rey Kuhn, David N. Brown, J. Steven Schnell, Raymond J. |
author_sort | Motamayor, Juan C. |
collection | PubMed |
description | Numerous collecting expeditions of Theobroma cacao L. germplasm have been undertaken in Latin-America. However, most of this germplasm has not contributed to cacao improvement because its relationship to cultivated selections was poorly understood. Germplasm labeling errors have impeded breeding and confounded the interpretation of diversity analyses. To improve the understanding of the origin, classification, and population differentiation within the species, 1241 accessions covering a large geographic sampling were genotyped with 106 microsatellite markers. After discarding mislabeled samples, 10 genetic clusters, as opposed to the two genetic groups traditionally recognized within T. cacao, were found by applying Bayesian statistics. This leads us to propose a new classification of the cacao germplasm that will enhance its management. The results also provide new insights into the diversification of Amazon species in general, with the pattern of differentiation of the populations studied supporting the palaeoarches hypothesis of species diversification. The origin of the traditional cacao cultivars is also enlightened in this study. |
format | Text |
id | pubmed-2551746 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-25517462008-10-01 Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) Motamayor, Juan C. Lachenaud, Philippe da Silva e Mota, Jay Wallace Loor, Rey Kuhn, David N. Brown, J. Steven Schnell, Raymond J. PLoS One Research Article Numerous collecting expeditions of Theobroma cacao L. germplasm have been undertaken in Latin-America. However, most of this germplasm has not contributed to cacao improvement because its relationship to cultivated selections was poorly understood. Germplasm labeling errors have impeded breeding and confounded the interpretation of diversity analyses. To improve the understanding of the origin, classification, and population differentiation within the species, 1241 accessions covering a large geographic sampling were genotyped with 106 microsatellite markers. After discarding mislabeled samples, 10 genetic clusters, as opposed to the two genetic groups traditionally recognized within T. cacao, were found by applying Bayesian statistics. This leads us to propose a new classification of the cacao germplasm that will enhance its management. The results also provide new insights into the diversification of Amazon species in general, with the pattern of differentiation of the populations studied supporting the palaeoarches hypothesis of species diversification. The origin of the traditional cacao cultivars is also enlightened in this study. Public Library of Science 2008-10-01 /pmc/articles/PMC2551746/ /pubmed/18827930 http://dx.doi.org/10.1371/journal.pone.0003311 Text en This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. https://creativecommons.org/publicdomain/zero/1.0/ This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. |
spellingShingle | Research Article Motamayor, Juan C. Lachenaud, Philippe da Silva e Mota, Jay Wallace Loor, Rey Kuhn, David N. Brown, J. Steven Schnell, Raymond J. Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) |
title | Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) |
title_full | Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) |
title_fullStr | Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) |
title_full_unstemmed | Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) |
title_short | Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L) |
title_sort | geographic and genetic population differentiation of the amazonian chocolate tree (theobroma cacao l) |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2551746/ https://www.ncbi.nlm.nih.gov/pubmed/18827930 http://dx.doi.org/10.1371/journal.pone.0003311 |
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