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	Provedor de dados Genet. Mol. Biol. (2) Autor Pereira,Sérgio L. (2) Delbem,Alexandre C.B. (1) Vittori,Karla (1) Wajntal,Anita (1) Palavra-chave Ant colony optimization (1) Aves (1) Biogeography (1) Distance algorithms (1) Molecular time estimates (1) Phylogenetic estimation (1) Pteroglossus (1) Ramphastidae (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Ano 2008 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The historical biogeography of Pteroglossus aracaris (Aves, Piciformes, Ramphastidae) based on Bayesian analysis of mitochondrial DNA sequences Genet. Mol. Biol. Pereira,Sérgio L.; Wajntal,Anita. Most Neotropical birds, including Pteroglossus aracaris, do not have an adequate fossil record to be used as time constraints in molecular dating. Hence, the evolutionary timeframe of the avian biota can only be inferred using alternative time constraints. We applied a Bayesian relaxed clock approach to propose an alternative interpretation for the historical biogeography of Pteroglossus based on mitochondrial DNA sequences, using different combinations of outgroups and time constraints obtained from outgroup fossils, vicariant barriers and molecular time estimates. The results indicated that outgroup choice has little effect on the Bayesian posterior distribution of divergence times within Pteroglossus , that geological and molecular time constraints... Palavras-chave: Pteroglossus; Ramphastidae; Aves; Molecular time estimates; Biogeography. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500026 Ant-Based Phylogenetic Reconstruction (ABPR): A new distance algorithm for phylogenetic estimation based on ant colony optimization Genet. Mol. Biol. Vittori,Karla; Delbem,Alexandre C.B.; Pereira,Sérgio L.. We propose a new distance algorithm for phylogenetic estimation based on Ant Colony Optimization (ACO), named Ant-Based Phylogenetic Reconstruction (ABPR). ABPR joins two taxa iteratively based on evolutionary distance among sequences, while also accounting for the quality of the phylogenetic tree built according to the total length of the tree. Similar to optimization algorithms for phylogenetic estimation, the algorithm allows exploration of a larger set of nearly optimal solutions. We applied the algorithm to four empirical data sets of mitochondrial DNA ranging from 12 to 186 sequences, and from 898 to 16,608 base pairs, and covering taxonomic levels from populations to orders. We show that ABPR performs better than the commonly used Neighbor-Joining... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phylogenetic estimation; Distance algorithms; Ant colony optimization. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500027 Registros recuperados: 2 Primeira ... 1 ... Última

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