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	Provedor de dados Genet. Mol. Biol. (3) Autor Diniz-Filho,José Alexandre Felizola (3) Rodrigues,Flávia Melo (3) Bastos,Rogério Pereira (1) Bataus,Luiz Artur Mendes (1) Palavra-chave Anura (1) Canids (1) Clustering (1) Genetic distances (1) Mantel test (1) Parque Nacional das Emas (1) Population persistence (1) Population viability analysis (1) RAPD (1) STR markers (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2007 (1) 2002 (1) 1998 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Hierarchical structure of genetic distances: Effects of matrix size, spatial distribution and correlation structure among gene frequencies Genet. Mol. Biol. Rodrigues,Flávia Melo; Diniz-Filho,José Alexandre Felizola. Geographic structure of genetic distances among local populations within species, based on allozyme data, has usually been evaluated by estimating genetic distances clustered with hierarchical algorithms, such as the unweighted pair-group method by arithmetic averages (UPGMA). The distortion produced in the clustering process is estimated by the cophenetic correlation coefficient. This hierarchical approach, however, can fail to produce an accurate representation of genetic distances among populations in a low dimensional space, especially when continuous (clinal) or reticulate patterns of variation exist. In the present study, we analyzed 50 genetic distance matrices from the literature, for animal taxa ranging from Platyhelminthes to Mammalia, in order... Tipo: Info:eu-repo/semantics/article Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000200010 Extinction of canid populations by inbreeding depression under stochastic environments in Southwestern Goiás State: a simulation study Genet. Mol. Biol. Rodrigues,Flávia Melo; Diniz-Filho,José Alexandre Felizola. A frequently addressed question in conservation biology is what is the chance of survival for a population for a given number of years under certain conditions of habitat loss and human activities. This can be estimated through an integrated analysis of genetic, demographic and landscape processes, which allows the prediction of more realistic and precise models of population persistence. In this study, we modeled extinction in stochastic environments under inbreeding depression for two canid species, the maned wolf (Chrysocyon brachiurus) and the crab-eating fox (Cerdocyon thous), in southwest Goiás State. Genetic parameters were obtained from six microsattelite loci (Short Tandem Repeats - STR), which allowed estimates of inbreeding levels and of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Population persistence; Population viability analysis; Canids; STR markers; Parque Nacional das Emas. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100021 Hypothesis testing of genetic similarity based on RAPD data using Mantel tests and model matrices Genet. Mol. Biol. Rodrigues,Flávia Melo; Diniz-Filho,José Alexandre Felizola; Bataus,Luiz Artur Mendes; Bastos,Rogério Pereira. Clustering and ordination procedures in multivariate analyses have been widely used to describe patterns of genetic distances. However, in some cases, such as when dealing with Jaccard coefficients based on RAPD data, these techniques may fail to represent genetic distances because of the high dimensionality of the genetic distances caused by stochastic variation in DNA fragments among the units analyzed (species or populations). In this note, we show how Mantel tests can be used to test hypotheses about genetic distances and avoid problems with multivariate data representation. The procedure is illustrated with RAPD data comparing 20 anuran species from the cerrado, in which Jaccard genetic distances were compared to three model matrices linking the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Anura; Clustering; Genetic distances; Mantel test; RAPD. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400013 Registros recuperados: 3 Primeira ... 1 ... Última

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