GSBS Dissertations and Theses

Approval Date

6-25-2013

Document Type

Doctoral Dissertation

Academic Program

Bioinformatics and Computational Biology

Department

Program in Bioinformatics & Integrative Biology

First Thesis Advisor

Jeffrey D. Jensen, PhD

Keywords

Population Genetics, Genetic Selection, Human Genome, Statistical Data Interpretation

Subjects

Dissertations, UMMS; Genetics, Population; Selection, Genetic; Genome, Human; Data Interpretation, Statistical

Abstract

As sequencing technology continues to produce better quality genomes at decreasing costs, there has been a recent surge in the variety of data that we are now able to analyze. This is particularly true with regards to our understanding of the human genome—where the last decade has seen data advances in primate epigenomics, ancient hominid genomics, and a proliferation of human polymorphism data from multiple populations. In order to utilize such data however, it has become critical to develop increasingly sophisticated tools spanning both bioinformatics and statistical inference. In population genetics particularly, new statistical approaches for analyzing population data are constantly being developed—unfortunately, often without proper model testing and evaluation of type-I and type-II error. Because the common Wright-Fisher assumptions underlying such models are generally violated in natural populations, this statistical testing is critical. Thus, my dissertation has two distinct but related themes: 1) evaluating methods of statistical inference in population genetics, and 2) utilizing these methods to analyze the evolutionary history of humans and our closest relatives. The resulting collection of work has not only provided important biological insights (including some of the first strong evidence of selection on human-specific epigenetic modifications (Shulha, Crisci, Reshetov, Tushir et al. 2012, PLoS Bio), and a characterization of human-specific genetic changes distinguishing modern humans from Neanderthals (Crisci et al. 2011, GBE)), but also important insights in to the performance of population genetic methodologies which will motivate the future development of improved approaches for statistical inference (Crisci et al, in review).

DOI

10.13028/M2Q88F

Rights and Permissions

Copyright is held by the author, with all rights reserved.

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