Abstract Detail



Phylogenomic Perspectives on Reproductive Isolation and Introgression

Blischak, Paul [1].

Putting the Genome in Phylogenomics: Considerations for Inferring Phylogenies from Chromosome-Scale Data.

Modern phylogenomic workflows typically analyze hundreds to thousands of genes to infer the evolutionary history of a group of organisms. Discordance among the individual gene histories is common, especially for closely related and/or rapidly diversifying clades, and can be caused by a number of factors (e.g. low phylogenetic signal, estimation error, incomplete lineage sorting [ILS], hybridization/introgression, etc.). Models for inferring phylogenies while accommodating these sources of discordance provide important tools for researchers interested in disentangling patterns of divergence and admixture. However, many of these methods assume conditional independence of the gene histories given the phylogeny, implying that all genes are completely unlinked. As genome sequencing continues to drop in cost and technologies capable of chromosome-scale assemblies from long, single-molecule sequencing reads become standard, we are quickly approaching an era in phylogenomics that will require us to truly consider the effect of phylogeny on the entire genome. Using both simulations and empirical analyses of genome-scale data, we explore genealogical relationships along the genome as well as how these patterns affect phylogenetic inference and the detection of hybridization and introgression.


1 - University of Arizona, Ecology and Evolutionary Biology, 1041 E Lowell St, Tucson, AZ, 85721, United States

Keywords:
hybridization
introgression
recombination
phylogenetic network
Genome Evolution.

Presentation Type: Symposium Presentation
Number: 0002
Abstract ID:731
Candidate for Awards:None


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