Data/hora: 14/06/2024 19:30:00

Provedor de dados: | 74
País: | Brazil
Título: | Pollen and seed flow patterns of Carapa guianensis Aublet. (Meliaceae) in two types of Amazonian forest
Autores: | Martins,Karina; Raposo,Andréa; Klimas,Christie A; Veasey,Elizabeth A; Kainer,Karen; Wadt,Lúcia Helena O.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Gene flow; Parentage analysis; Scatterhoarding; Seed dispersal; Spatial genetic structure.
Resumo: | Various factors affect spatial genetic structure in plant populations, including adult density and primary and secondary seed dispersal mechanisms. We evaluated pollen and seed dispersal distances and spatial genetic structure of Carapa guianensis Aublet. (Meliaceae) in occasionally inundated and terra firme forest environments that differed in tree densities and secondary seed dispersal agents. We used parentage analysis to obtain contemporary gene flow estimates and assessed the spatial genetic structure of adults and juveniles. Despite the higher density of adults (diameter at breast height ; 25 cm) and spatial aggregation in occasionally inundated forest, the average pollen dispersal distance was similar in both types of forest (195 ± 106min terra firme and 175 ± 87 m in occasionally inundated plots). Higher seed flow rates (36.7% of juveniles were from outside the plot) and distances (155 ± 84 m) were found in terra firme compared to the occasionally inundated plot (25.4% and 114 ± 69 m). There was a weak spatial genetic structure in juveniles and in terra firme adults. These results indicate that inundation may not have had a significant role in seed dispersal in the occasionally inundated plot, probably because of the higher levels of seedling mortality.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000500017
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572012005000068
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.35 n.4 2012
Fonte: | info:eu-repo/semantics/openAccess