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Abstract Detail

Species tree reconstruction in polyploid complexes

Nakhleh, Luay [1].

From gene trees to species networks.

When hybridization occurs, the evolutionary history of species is best modeled by a phylogenetic network. This model extends phylogenetic trees to allow for species whose ancestry involve more than one species. Methods for reconstructing phylogenetic networks from gene trees has been an active area of research for the last two decades. These methods assume that all incongruence among gene trees is due to hybridization and use this assumption to infer networks. However, as hybridization occurs mostly between closely related species, patterns of gene tree incongruence may arise also due to incomplete lineage sorting (ILS). In this talk, I will describe parsimony- and likelihood-based methods for inferring phylogenetic networks from gene trees while accounting for ILS. These methods have been implemented in the publicly available, open-source software package PhyloNet (

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1 - Rice University, Computer Science, 6100 Main Street, MS 132, Houston, TX, 77005, USA

incomplete lineage sorting
phylogenetic network
gene tree.

Presentation Type: Symposium or Colloquium Presentation
Session: SY09
Location: Grand Ballroom A/Riverside Hilton
Date: Wednesday, July 31st, 2013
Time: 8:30 AM
Number: SY09003
Abstract ID:211
Candidate for Awards:None

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