MBI Seminar Series - Andrew Richards

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October 22, 2020
10:00AM - 11:00AM
Location
Virtual Zoom Seminar

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Add to Calendar 2020-10-22 10:00:00 2020-10-22 11:00:00 MBI Seminar Series - Andrew Richards Title: New Methods of Species Tree Inference Under the Multispecies Coalescent Abstract: The inference of the evolutionary relationships between species is a central question in biology.  This inference is difficult to perform as the abundance of data and high dimensionality of the problem lead to long computational times. We have developed a new fast and accurate algorithm for inference in the presence of incomplete lineage sorting (ILS), commonly modeled by the multispecies coalescent.  This work builds upon Chifman and Kubatko (2015), who derived the likelihood of a four-taxon species tree under the coalescent process. We use Bayes’s Rule to derive posterior probabilities of four-taxon species trees, and use them in supertree assembly algorithms to estimate the final n-taxon tree. We show results for both simulated data and real data. Zoom information: To join the seminar by zoom, please use the following link: https://osu.zoom.us/j/94923872944?pwd=WnhnU3hmb2RHTzRvcnN2SWFYdURnQT09 Video: https://osu.box.com/s/sewq3i12iajl0i2398a9ovalw210hkda Virtual Zoom Seminar Mathematical Biosciences Institute mbi-webmaster@osu.edu America/New_York public
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Title: New Methods of Species Tree Inference Under the Multispecies Coalescent

Abstract: The inference of the evolutionary relationships between species is a central question in biology.  This inference is difficult to perform as the abundance of data and high dimensionality of the problem lead to long computational times. We have developed a new fast and accurate algorithm for inference in the presence of incomplete lineage sorting (ILS), commonly modeled by the multispecies coalescent.  This work builds upon Chifman and Kubatko (2015), who derived the likelihood of a four-taxon species tree under the coalescent process. We use Bayes’s Rule to derive posterior probabilities of four-taxon species trees, and use them in supertree assembly algorithms to estimate the final n-taxon tree. We show results for both simulated data and real data.

Zoom information: To join the seminar by zoom, please use the following link: https://osu.zoom.us/j/94923872944?pwd=WnhnU3hmb2RHTzRvcnN2SWFYdURnQT09

Video: https://osu.box.com/s/sewq3i12iajl0i2398a9ovalw210hkda

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