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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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Concatenated mitochondrial and nuclear 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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fig0015: Concatenated mitochondrial and nuclear 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: As with the single gene trees described above, the inferred ML and Bayesian topologies from the concatenated alignment of 2506 sites were identical for moderately to well-supported nodes (Fig. 3). Nodes in this tree are congruent with those moderately to highly supported nodes in a previously published concatenated topology (Dunthorn et al. 2011). The Marynidae s.l. are not monophyletic, although, as above, there is little confidence in this as none of the intervening nodes are moderately to fully supported. Ilsiella branches in a position similar to the nSSU-rDNA tree.


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)

Concatenated mitochondrial and nuclear 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

fig0015: Concatenated mitochondrial and nuclear 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: As with the single gene trees described above, the inferred ML and Bayesian topologies from the concatenated alignment of 2506 sites were identical for moderately to well-supported nodes (Fig. 3). Nodes in this tree are congruent with those moderately to highly supported nodes in a previously published concatenated topology (Dunthorn et al. 2011). The Marynidae s.l. are not monophyletic, although, as above, there is little confidence in this as none of the intervening nodes are moderately to fully supported. Ilsiella branches in a position similar to the nSSU-rDNA tree.

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