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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

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Insect phylogenomics: exploring the source of incongruence using new transcriptomic data.

Sabrina Simon¹, Apurva Narechania, Rob Desalle

¹ITZ, Ecology & Evolution, Stiftung Tieraerztliche Hochschule Hannover, Hannover, Germany. ssimon@amnh.org

Genome Biology and Evolution

|November 24, 2012

Summary

This study provides the first transcriptomic data for three insect orders, resolving debated polyneopteran relationships. The findings support monophyletic Polyneoptera, clarifying insect evolution.

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A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

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Area of Science:

Evolutionary Biology
Insect Systematics
Phylogenomics

Background:

Insect phylogeny, especially interordinal relationships, remains challenging.
The radiation of polyneopteran lineages presents unresolved systematic issues.

Purpose of the Study:

To provide the first transcriptomic data for Dermaptera, Plecoptera, and Zoraptera.
To clarify debated higher insect systematic relationships using phylogenomic approaches.
To investigate phylogenetic reconstruction challenges like missing data and gene/taxa sampling.

Main Methods:

Generated transcriptomic data for 78 species across 1,579 orthologous gene clusters.
Applied multiple phylogenetic reconstruction approaches.
Evaluated data quality and analyzed problematic phylogenetic nodes.

Main Results:

Provided conclusive support for monophyletic Polyneoptera.
Contested hypotheses of Zoraptera + Paraneoptera and Plecoptera + remaining Neoptera.
Identified remaining problematic nodes in the Insect Tree and factors influencing support.

Conclusions:

The study resolves key debates in polyneopteran phylogeny, supporting monophyly.
Highlights the impact of taxon and gene sampling on phylogenetic resolution.
Advances understanding of insect evolutionary history through phylogenomics.