Family-level sampling of mitochondrial genomes in coleoptera: compositional heterogeneity and phylogenetics
Article
Timmermans, M., Barton, C., Haran, J., Ahrens, D., Culverwell, C., Ollikainen, A., Dodsworth, S., Foster, P., Bocak, L. and Vogler, A. 2016. Family-level sampling of mitochondrial genomes in coleoptera: compositional heterogeneity and phylogenetics. Genome Biology and Evolution. 8 (1), pp. 161-175. https://doi.org/10.1093/gbe/evv241
Type | Article |
---|---|
Title | Family-level sampling of mitochondrial genomes in coleoptera: compositional heterogeneity and phylogenetics |
Authors | Timmermans, M., Barton, C., Haran, J., Ahrens, D., Culverwell, C., Ollikainen, A., Dodsworth, S., Foster, P., Bocak, L. and Vogler, A. |
Abstract | Mitochondrial genomes are readily sequenced with recent technology and thus evolutionary lineages can be sampled more densely. This permits better phylogenetic estimates and assessment of potential biases resulting from heterogeneity in nucleotide composition and rate of change. We gathered 245 mitochondrial sequences for the Coleoptera representing all 4 suborders, 15 superfamilies of Polyphaga, and altogether 97 families, including 159 newly sequenced full or partial mitogenomes. Compositional heterogeneity greatly affected 3rd codon positions, and to a lesser extent the 1st and 2nd positions, even after RY coding. Heterogeneity also affected the encoded protein sequence, in particular in the nad2, nad4, nad5 and nad6 genes. Credible tree topologies were obtained with the nhPhyML (‘non-homogeneous’) algorithm implementing a model for branch-specific equilibrium frequencies. Likelihood searches using RAxML were improved by data partitioning by gene and codon position. Finally, the PhyloBayes software, which allows different substitution processes for amino acid replacement at various sites, produced a tree that best matched known higher-level taxa and defined basal relationships in Coleoptera. After rooting with Neuropterida outgroups, suborder relationships were resolved as (Polyphaga (Myxophaga (Archostemata + Adephaga))). The infraorder relationships in Polyphaga were (Scirtiformia (Elateriformia (Staphyliniformia + Scarabaeiformia (Bostrichiformia (Cucujiformia)))). Polyphagan superfamilies were recovered as monophyla except Staphylinoidea (paraphyletic for Scarabaeiformia) and Cucujoidea, which can no longer be considered a valid taxon. The study shows that, whilst compositional heterogeneity is not universal, it cannot be eliminated for some mitochondrial genes, but dense taxon sampling and the use of appropriate Bayesian analyses can still produce robust phylogenetic trees. |
Publisher | Oxford University Press (OUP) |
Journal | Genome Biology and Evolution |
ISSN | 1759-6653 |
Electronic | 1759-6653 |
Publication dates | |
Online | 08 Dec 2015 |
31 Jan 2016 | |
Publication process dates | |
Deposited | 12 Feb 2016 |
Accepted | 28 Nov 2015 |
Output status | Published |
Publisher's version | |
Copyright Statement | © The Author(s) 2015. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. |
Additional information | First published online: December 8, 2015 |
Digital Object Identifier (DOI) | https://doi.org/10.1093/gbe/evv241 |
Language | English |
https://repository.mdx.ac.uk/item/86209
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