Data/hora: 04/06/2024 01:32:03

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Patterns of genetic diversity in southern and southeastern Araucaria angustifolia (Bert.) O. Kuntze relict populations	
Autores: 	Souza,Maria Isabel Ferreira de; Salgueiro,Fabiano; Carnavale-Bottino,Mariana; Félix,Durvalina Benedita; Alves-Ferreira,Marcio; Bittencourt,Juliana Vitoria Messias; Margis,Rogério.	
Data: 	2009-01-01	
Ano: 	2009	
Palavras-chave: 	Araucariaceae; Relict populations; Araucaria forest; Population genetics; AFLP.	
Resumo: 	Habitat fragmentation and a decrease in population size may lead to a loss in population genetic diversity. For the first time, the reduction in genetic diversity in the northernmost limit of natural occurence (southeastern Brazil) of Araucaria angustifolia in comparison with populations in the main area of the species continuous natural distribution (southern Brazil), was tested. The 673 AFLPs markers revealed a high level of genetic diversity for the species (Ht = 0.27), despite anthropogenic influence throughout the last century, and a decrease of H in isolated populations of southeastern Brazil (H = 0.16), thereby indicating the tendency for higher genetic diversity in remnant populations of continuous forests in southern Brazil, when compared to natural isolated populations in the southeastern region. A strong differentiation among southern and southeastern populations was detected (AMOVA variance ranged from 10%-15%). From Bayesian analysis, it is suggested that the nine populations tested form five "genetic clusters" (K = 5). Five of these populations, located in the northernmost limit of distribution of the species, represent three "genetic clusters". These results are in agreement with the pattern of geographic distribution of the studied populations.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300018	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572009005000052	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.32 n.3 2009	
Fonte: 	info:eu-repo/semantics/openAccess