Phylogenetic study of Class Armophorea (Alveolata, Ciliophora) based on 18S-rDNA data.

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 depende

SUBMITTER: da Silva Paiva T 

PROVIDER: S-EPMC3873190 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature