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Congruence and indifference between two molecular markers for understanding oral evolution in the Marynidae sensu lato (Ciliophora, Colpodea).

Dunthorn M, Katz LA, Stoeck T, Foissner W - Eur. J. Protistol. (2012)

Bottom Line: Our understanding of the evolution of oral structures within the Colpodida is confounded by the low number of morphological characters that can be used in constructing hypotheses, and by the low taxon and character sampling in molecular phylogenetic analyses designed to assess these hypotheses.We show that the inferred mitochondrial and nuclear SSU-rDNA trees, as well as concatenated and constrained analyses, are congruent in not recovering a monophyletic Marynidae.However, due to low node support, the trees are indifferent to whether the morphological characters used to unite the Marynidae are the result of retention of ancestral states or convergence.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology, University of Kaiserslautern, Germany. dunthorn@rhrk.uni-kl.de

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Mitochondrial SSU-rDNA topology of the Colpodida. The most likely ML tree and its branch lengths are shown. The Bayesian tree inferred using MrBayes and the ML tree are identical in topology for moderately to highly supported nodes. Node support is as follows: ML bootstrap/BI posterior probability. Support <50% is shown as ‘–’.
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fig0005: Mitochondrial SSU-rDNA topology of the Colpodida. The most likely ML tree and its branch lengths are shown. The Bayesian tree inferred using MrBayes and the ML tree are identical in topology for moderately to highly supported nodes. Node support is as follows: ML bootstrap/BI posterior probability. Support <50% is shown as ‘–’.

Mentions: The mitochondrial alignment of 830 included characters resulted in identical ML and Bayesian topologies for moderately to highly supported nodes. Here we present the most likely ML tree with node support from both methods (Fig. 1). For non-Marynidae sequences, the mtSSU-rDNA topology is congruent with a previously published tree (Dunthorn et al. 2011) for most nodes. The only substantial difference is the clade formed by Bardeliella and Hausmanniella (along with Ilsiella), but this node is not supported (<50 ML bootstrap/50 Bayesian posterior probability).


Congruence and indifference between two molecular markers for understanding oral evolution in the Marynidae sensu lato (Ciliophora, Colpodea).

Dunthorn M, Katz LA, Stoeck T, Foissner W - Eur. J. Protistol. (2012)

Mitochondrial SSU-rDNA topology of the Colpodida. The most likely ML tree and its branch lengths are shown. The Bayesian tree inferred using MrBayes and the ML tree are identical in topology for moderately to highly supported nodes. Node support is as follows: ML bootstrap/BI posterior probability. Support <50% is shown as ‘–’.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3473355&req=5

fig0005: Mitochondrial SSU-rDNA topology of the Colpodida. The most likely ML tree and its branch lengths are shown. The Bayesian tree inferred using MrBayes and the ML tree are identical in topology for moderately to highly supported nodes. Node support is as follows: ML bootstrap/BI posterior probability. Support <50% is shown as ‘–’.
Mentions: The mitochondrial alignment of 830 included characters resulted in identical ML and Bayesian topologies for moderately to highly supported nodes. Here we present the most likely ML tree with node support from both methods (Fig. 1). For non-Marynidae sequences, the mtSSU-rDNA topology is congruent with a previously published tree (Dunthorn et al. 2011) for most nodes. The only substantial difference is the clade formed by Bardeliella and Hausmanniella (along with Ilsiella), but this node is not supported (<50 ML bootstrap/50 Bayesian posterior probability).

Bottom Line: Our understanding of the evolution of oral structures within the Colpodida is confounded by the low number of morphological characters that can be used in constructing hypotheses, and by the low taxon and character sampling in molecular phylogenetic analyses designed to assess these hypotheses.We show that the inferred mitochondrial and nuclear SSU-rDNA trees, as well as concatenated and constrained analyses, are congruent in not recovering a monophyletic Marynidae.However, due to low node support, the trees are indifferent to whether the morphological characters used to unite the Marynidae are the result of retention of ancestral states or convergence.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology, University of Kaiserslautern, Germany. dunthorn@rhrk.uni-kl.de

Show MeSH
Related in: MedlinePlus