The impacts of drift and selection on genomic evolution in insects
K Jun Tong, Sebastian Duchene, Nathan Lo, Simon YW Ho
PEERJ | PEERJ INC | Published : 2017
Genomes evolve through a combination of mutation, drift, and selection, all of which act heterogeneously across genes and lineages. This leads to differences in branch-length patterns among gene trees. Genes that yield trees with the same branch-length patterns can be grouped together into clusters. Here, we propose a novel phylogenetic approach to explain the factors that influence the number and distribution of these gene-tree clusters. We apply our method to a genomic dataset from insects, an ancient and diverse group of organisms. We find some evidence that when drift is the dominant evolutionary process, each cluster tends to contain a large number of fast-evolving genes. In contrast, s..View full abstract
Awarded by Australian Research Council
This work was suppported by the Australian Research Council (grant number DP160104173). KJT was supported by an Australian Postgraduate Award. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.