| Registro completo |
| Provedor de dados: |
Acta Amazonica
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| País: |
Brazil
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| Título: |
Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia
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| Autores: |
Santos,Ronaldo Pereira
Ângelo,Paula Cristina da Silva
Sampaio,Paulo de Tarso Barbosa
Quisen,Regina Caetano
Leite,Ângela Maria Conte
Oliveira,Cristiane Lopes de
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| Data: |
2008-01-01
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| Ano: |
2008
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| Palavras-chave: |
RAPD
Linalool
Gene flow
Amazon Rainforest
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| Resumo: |
Rosewood (Aniba rosaeodora Ducke, Lauraceae) is an Amazonian evergreen tree and a source of the purest linalool, the main component of its essential oil, which is very valuable in the international perfumery market. After decades of over-exploitation it is currently considered as threatened. We evaluated the genetic diversity and its distribution in four populations in Central Amazonia. Thirty-five reliable RAPD markers were generated, of which 32 were polymorphic (91.4%). Variation was higher within the populations (76.5%; p < 0.0001) and geographic distribution contributed to population differentiation (23.4%; p < 0.0001). The Amazon River had a small influence on gene flow (3.3%; p < 0.0001), but we identified evidence of gene flow across the river. There were significant differences in marker frequencies (p < 0.05), in agreement with the low gene flow (Nm = 2.02). The correlation between genetic distance and gene flow was - 0.95 (p = 0.06) and between geographic distance and gene flow was -0.78 (p = 0.12). There was a geographic cline of variability across an East-West axis, influenced as well by the Amazon River, suggesting the river could be a barrier to gene flow. Although threatened, these Rosewood populations retain high diversity, with the highest levels in the Manaus population, which has been protected for over 42 years in a Reserve.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000300010
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| Editor: |
Instituto Nacional de Pesquisas da Amazônia
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| Relação: |
10.1590/S0044-59672008000300010
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| Formato: |
text/html
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| Fonte: |
Acta Amazonica v.38 n.3 2008
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| Direitos: |
info:eu-repo/semantics/openAccess
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