Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia
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 eval...
| Autor principal: | Santos, Ronaldo Pereira |
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| Outros Autores: | Aangelo, Paula Cristina da Silva, Sampaio, Paulo de Tarso Barbosa, Quisen, Regina Caetano, Leite, Ângela Maria Conte, Oliveira, Cristiane Lopes de |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Acta Amazonica
2020
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https://repositorio.inpa.gov.br/handle/1/13543 |
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oai:repositorio:1-13543 |
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oai:repositorio:1-13543 Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia Padrão geográfico de diversidade genética em populações naturais de Pau-rosa (Aniba rosaeodora), na Amazônia Central Santos, Ronaldo Pereira Aangelo, Paula Cristina da Silva Sampaio, Paulo de Tarso Barbosa Quisen, Regina Caetano Leite, Ângela Maria Conte Oliveira, Cristiane Lopes de Rapd Linalool Gene Flow Amazon Rainforest Rapd Linalol Fluxo Gênico Floresta Úmida Amazônica 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. O Pau-rosa (Aniba rosaeodora Ducke, Lauraceae) é uma árvore amazônica fonte do mais puro linalol, o qual é o principal componente do seu óleo essencial e muito valioso no mercado internacional de perfumaria. Após várias décadas de intensa exploração, a espécie foi levada à categoria de ameaçada de extinção. Quatro populações naturais distribuídas na bacia Amazônia Central foram avaliadas quanto ao nível e a distribuição da diversidade genética. Trinta e cinco marcadores RAPD reprodutíveis foram gerados, dos quais 32 foram polimórficos (91,4%). A diversidade foi maior dentro das populações (76,5%; p < 0,0001) e a distribuição geográfica contribuiu para a diferenciação entre as populações (23,4%; p < 0,0001). A AMOVA indicou que pode haver uma influência parcial do Rio Amazonas no fluxo gênico (3,3%; p < 0,0001), mas foram identificadas evidências de fluxo gênico atravessando o rio. Houve diferenças significativas nas freqüências dos marcadores (p < 0,05) e o fluxo gênico estimado foi relativamente baixo (Nm = 2,02). A correlação entre a distância genética e o fluxo gênico foi de - 0,95 (p = 0,06) e para a distância geográfica e o fluxo gênico foi de - 0,78 (p = 0,12). Houve um padrão geográfico de variabilidade ao longo do eixo Leste - Oeste, influenciado também pelo Rio Amazonas, o que sugere que o rio poderia funcionar como uma barreira para o fluxo gênico. Apesar de ameaçadas, estas populações de Pau-rosa possuem alta diversidade, com o maior valor na população de Manaus, que vem sendo protegida por 42 anos em uma reserva. 2020-04-24T15:29:40Z 2020-04-24T15:29:40Z 2008 Artigo https://repositorio.inpa.gov.br/handle/1/13543 10.1590/S0044-59672008000300010 en Volume 38, Número 3, Pags. 459-466 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Amazonica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Rapd Linalool Gene Flow Amazon Rainforest Rapd Linalol Fluxo Gênico Floresta Úmida Amazônica |
| spellingShingle |
Rapd Linalool Gene Flow Amazon Rainforest Rapd Linalol Fluxo Gênico Floresta Úmida Amazônica Santos, Ronaldo Pereira Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia |
| topic_facet |
Rapd Linalool Gene Flow Amazon Rainforest Rapd Linalol Fluxo Gênico Floresta Úmida Amazônica |
| description |
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. |
| format |
Artigo |
| author |
Santos, Ronaldo Pereira |
| author2 |
Aangelo, Paula Cristina da Silva Sampaio, Paulo de Tarso Barbosa Quisen, Regina Caetano Leite, Ângela Maria Conte Oliveira, Cristiane Lopes de |
| author2Str |
Aangelo, Paula Cristina da Silva Sampaio, Paulo de Tarso Barbosa Quisen, Regina Caetano Leite, Ângela Maria Conte Oliveira, Cristiane Lopes de |
| title |
Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia |
| title_short |
Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia |
| title_full |
Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia |
| title_fullStr |
Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia |
| title_full_unstemmed |
Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia |
| title_sort |
geographic pattern of genetic diversity in natural populations of rosewood (aniba rosaeodora), in the central amazonia |
| publisher |
Acta Amazonica |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/13543 |
| _version_ |
1787141292206063616 |
| score |
11.755432 |