Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"species tree estimation"”.
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Supertree-like methods for genome-scale species tree estimation
A critical step in many biological studies is the estimation of evolutionary trees (phylogenies) from genomic data. Of particular interest is the species tree, which illustrates how a set of species evolved from a common ancestor. While species trees were previously estimated from a few regions of …
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Improving gene trees without more data
Species tree and gene tree estimation from sequence data are two steps in many biological analyses. Computational challenges and limited amount of data often make estimating highly accurate phylogenetic trees a difficult task. Moreover, gene alignments used to estimate trees on individual loci …
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Large scale phylogenomic estimation
Phylogenomic estimation - the science of calculating evolutionary trees from genomic data - is an important biological problem. As the amount of genomic data in biological datasets increases, new methods are needed to analyze this data. Cutting edge analyses may utilize genomes from tens of …
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Novel computational methods for discordance-aware phylogenomic analysis
Inferring the evolutionary history of a set of species is a key step in many biological and medical research projects, as species trees provide a context in which problems in comparative genomics, biodiversity, phylogeography and epidemiology can be addressed. Recent advances in sequencing …
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Statistical estimation problems in phylogenomics and applications in microbial ecology
… a multiple sequence alignment and phylogenetic tree. First we consider the related problem of estimating the population-level phylogeny of a group of species based on the alignments and phylogenies of several individual genes. Under one common model, species tree estimation is provably …
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Molecular phylogenetics, systematics, reproductive safeguarding and chromosome evolution of the genus Lachenalia (Asparagaceae: Scilloideae)
The genus Lachenalia, comprising 142 species and belonging to the monocotyledonous family Asparagaceae, is morphologically diverse and the most species-rich member of the family in southern Africa. Past attempts to infer a well-resolved and robustly supported phylogenetic tree using Sanger …
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Molecular phylogenetics of the North American snake tribe Thamnophiini
… process of genome evolution while the second (species-tree methods) may be overly complex for histories characterized by long divergence times between cladogenesis. Rather than making an a priori determination concerning which of these phylogenetic models to apply to our data, I seek to provide …