Abstract Detail



Phylogenomics

Walker, Joseph [1], Brown, Joseph [2], Smith, Stephen [3].

Embracing gene tree conflict to inform species relationships: An example in the clade Caryophyllales.

Gene tree conflict remains one of the greatest obstacles for inferring the tree of life. This conflict arises from a variety of biological sources including incomplete lineage sorting, hybridization, and gene duplication and loss. Although gene tree conflict underlies phylogenetic datasets, the use of genome scale data (phylogenomics) provides a means of performing further analysis on this conflict. Here we examine the long debated backbone relationships of the clade Caryophyllales by analyzing every conflicting relationship found among the gene trees. We then form a consensus tree through a method that combines likelihood-weighted species relationships while accommodating conflict in other parts of the tree. This allows us to characterize the extent to which gene tree conflict penalizes the inferred species tree across every relationship. This novel method provides insight into the evolutionary relationships among the Caryophyllales and a new approach for analyzing species trees and the gene tree conflict underlying them.


1 - University Of Michigan, Ecology And Evolutionary Biology, 2071 Kraus Natural Science, 830 North University Ave., Ann Arbor, 48109, United States
2 - University of Michigan, Ecology and Evolutionary biology
3 - University of Michigan, Ecology and Evolutionary Biology, 2071A Kraus Natural Science Building, Ann Arbor, MI, 48109, USA

Keywords:
Phylogenomics
gene tree conflict
Caryophyllales
supermatrix
Coalescent.

Presentation Type: Oral Paper
Number:
Abstract ID:414
Candidate for Awards:None


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