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metadata.dc.type: Artigo de Periódico
Issue Date: 2013
metadata.dc.creator: PAIVA, Thiago da Silva
BORGES, Barbara do Nascimento
SILVA NETO, Inácio Domingos da
Title: Phylogenetic study of Class Armophorea (Alveolata, Ciliophora) based on 18S-rDNA data
Citation: PAIVA, Thiago da Silva; BORGES, Bárbara do Nascimento; SILVA NETO, Inácio Domingos da. Phylogenetic study of Class Armophorea (Alveolata, Ciliophora) based on 18S-rDNA data. Genetics and Molecular Biology, São Paulo, v. 36, n. 4, p. 571-585, 2013. Disponível em: <>. Acesso em: 26 ago. 2015. <>.
Abstract: The 18S rDNA phylogeny of Class Armophorea, a group of anaerobic ciliates, is proposed based on an analysis of 44 sequences (out of 195) retrieved from the NCBI/GenBank database. Emphasis was placed on the use of two nucleotide alignment criteria that involved variation in the gap-opening and gap-extension parameters and the use of rRNA secondary structure to orientate multiple-alignment. A sensitivity analysis of 76 data sets was run to assess the effect of variations in indel parameters on tree topologies. Bayesian inference, maximum likelihood and maximum parsimony phylogenetic analyses were used to explore how different analytic frameworks influenced the resulting hypotheses. A sensitivity analysis revealed that the relationships among higher taxa of the Intramacronucleata were dependent upon how indels were determined during multiple-alignment of nucleotides. The phylogenetic analyses rejected the monophyly of the Armophorea most of the time and consistently indicated that the Metopidae and Nyctotheridae were related to the Litostomatea. There was no consensus on the placement of the Caenomorphidae, which could be a sister group of the Metopidae + Nyctorheridae, or could have diverged at the base of the Spirotrichea branch or the Intramacronucleata tree.
Keywords: Filogenética
Análise de sensibilidade
ISSN: 1415-4757
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - ICB

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