Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Anais da ABC (AABC) (3) Autor Stefenon,Valdir M. (3) Behling,Hermann (1) Caprestano,Clarissa A. (1) Corneleo,Nathana S. (1) Costa,Leonardo S. da (1) Finkeldey,Reiner (1) Gailing,Oliver (1) Mais... Palavra-chave Allelic richness (1) Araucaria (1) Araucaria angustifolia (1) Brazilian pine (1) Climate dynamics (1) Demographic history (1) Genetic bottleneck (1) Inbreeding coefficient (1) Paleobotany (1) Population size recovery (1) Sampling strategy (1) Sexual system (1) Study design (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2015 (1) 2009 (1) 2008 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Monoicy in A. angustifolia (Bert.) O. Kuntze (Araucariaceae): I. Morphological aspects of the reproductive structures Anais da ABC (AABC) Stefenon,Valdir M.; Caprestano,Clarissa A.. Araucaria angustifolia (Bert.) O. Kuntze is a dioecious conifer species native of Brazil. The rare occurrence of monoiceous specimens have been attributed to pathogenic infections or other injuries in adult trees. Here, the morphological characteristics of male and female cones and pollen grains of a monoiceous A. angustifolia are described. Male and female cones and pollen grains presented normal morphology, lacking any sort of injuries or infection and suggesting the existence of further grounds for the occurrence of monoicy in this conifer species. Tipo: Info:eu-repo/semantics/article Palavras-chave: Araucaria; Sexual system; Brazilian pine. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400009 Conservation of Forest Biodiversity: how sample size affects the estimation of genetic parameters Anais da ABC (AABC) Costa,Leonardo S. da; Corneleo,Nathana S.; Stefenon,Valdir M.. Efficient designs are crucial for population genetic studies on forest species. In this study we employed individual based simulations aiming to evaluate what fraction of a population should be sampled to obtain confident estimations of allelic richness and of inbreeding coefficient in population genetic surveys. The simulations suggest that at least 10% of the total population has to be sampled to ensure reliable estimations of allelic richness and inbreeding coefficient. This approach will allow the confidence of the genetic parameters estimations of a larger number of populations, based on a minimal sample within each one. Tipo: Info:eu-repo/semantics/article Palavras-chave: Sampling strategy; Study design; Allelic richness; Inbreeding coefficient. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000201095 Evidences of delayed size recovery in Araucaria angustifolia populations after post-glacial colonization of highlands in Southeastern Brazil Anais da ABC (AABC) Stefenon,Valdir M.; Behling,Hermann; Gailing,Oliver; Finkeldey,Reiner. Up to date, little is known about the relationship between historical demography and the current genetic structure of A. Angus As a first effort towards overcoming this lack, microsatellite data scored in six populations and isozyme allele frequencies published for 11 natural stands of this species were analysed in order to assess molecular signatures of populations' demographic history. Signatures of genetic bottlenecks were captured in all analysed populations of southeastern Brazil. Among southern populations, signatures of small effective population size were observed in only three out of 13 populations. Southern populations likely experienced faster recovery of population size after migration onto highlands. Accordingly, current genetic diversity of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Araucaria angustifolia; Genetic bottleneck; Population size recovery; Demographic history; Climate dynamics; Paleobotany. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300005 Registros recuperados: 3 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco