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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 17 of 17 for “"Evolutionary rates"”.
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Evolutionary rates and patterns of artiodactyl limb reduction
Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2012-09-07T16:43:30Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Ecology, Evolution, and Conservation Biology (ID: 750) No. of bitstreams: 3 Bormet_Allison.doc: 1259008 …
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A new method for identifying site-specific evolutionary rates and its applications.
… of a new method for identifying site specific evolutionary rates, from conception of the idea, through the implementation to its application to data. TIGER, or tree independent generation of evolutionary rates, is based largely around the works of LeQuesne (1989), Wilkinson (1998) and Pisani …
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FIV-FCA and FIV-PCO Reverse Transcriptases: Expression, Purification and Activity Comparison
… related but they have significantly different evolutionary rates and virulence in their natural hosts. Additionally, recombination in FIV infested cats is common but there is no evidence for recombination in endemic cougar infections. The reverse transciptase (RT) encoded by FIV plays a key …
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FIV-FCA and FIV-PCO Reverse Transcriptases: Expression, Purification and Activity Comparison
… related but they have significantly different evolutionary rates and virulence in their natural hosts. Additionally, recombination in FIV infested cats is common but there is no evidence for recombination in endemic cougar infections. The reverse transciptase (RT) encoded by FIV plays a key …
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Bayesian phylogenetic models for relaxed clock and trait evolution
… to improve the e ciency of MCMC sampling for evolutionary models that include a per-branch rate parameter in phylogenetic trees. The proposed kernel changes evolutionary rates and divergence times at the same time, under the constraint that the implied genetic distances remain constant. …
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Temperature regulation and metabolic rhythms in populations of the house sparrow Passer domesticus
… clear. This study suggests that there has been evolutionary alteration of some of the metabolic processes of house sparrows since their introduction into the United States about the middle of the nineteenth century. It is evident from this study that metabolism does not possess the adaptive …
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Evolutionary, structural and functional features of cellular signalling networks
… a structural feature which may influence local evolutionary rates. Several examples of complex PTM signalling systems are then described. Chapter 2 presents a study of the evolution of modified amino acids in human proteins. By analysing sequence, polymorphism and mutation data at the species, …
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Host-parasite cophylogeny and rates of evolution in two rodent-louse assemblages
… long-term association likely has resulted in coevolutionary adaptations and counter adaptations on the part of both symbiotic partners. Phylogenetic analysis of chewing lice (Geomydoecus) reveals two major clades corresponding to the G. coronadoi and G. mexicanus species complexes. These louse …
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Rates of Molecular Evolution and Phylogenomic Inference
… to the area of lineage-specific variation in evolutionary rates, with improvements in more efficient computational implementations of relaxed molecular clock models and the proposal of new models of rate changes across branches. The practical application of relaxed molecular clock models was …
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Reassessment of species limits and diversification process in the Cape grass genus Ehrharta Thunb
… age estimates. Comparisons of morphological evolutionary rates, as well as rates of nonsynonymous to synonymous sequence evolution (��), provide little evidence to support the hypothesis that non-ecological processes have been more important at high elevations. Both the low- and …
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Genomic signatures of sex, selection and speciation in the microbial world
… homologous recombination events. By assessing rates of recombination within and between ecological populations, I conclude that ecological differentiation is driven by small number of habitat-specific alleles, while most loci are shared freely across habitats. The remainder of the thesis …
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Comparative microbial genome analysis of lactobacilli
… encoded genetic catalogue for modifying carbohydrates and proteins. In addition, we describe a broad and diverse presence of CRISPR-Cas immune systems, host interaction factors and bacteriocins that affect their natural and industrial environments, and mechanisms to withstand stress during …
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Time-Averaging and Morphology: Variability in Modern Populations and Fossil Assemblages of Mercenaria (Bivalvia)
… years, but previous studies have indicated that evolutionary rates over this time frame are typically high. These studies are based on colonization events, however, and are biased towards high rates. Data gathered here and in previous studies suggest that local populations may evolve rapidly at …
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Sex Chromosome Evolution in Blow Flies
… closely related species, indicative of rapid evolutionary rates. Sex chromosome karyotypes are generally conserved within families; however, many species have derived sex chromosome configurations. Insects display a plethora of sex chromosome systems due to rapid diversification caused by …
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Evolutionary dynamics of avian and non-avian limb morphology
… structure, and particularly how it changes over evolutionary time, will reveal how genetic variation translates into phenotypic variation, the sources of and limits to variation, and ultimately a mechanistic understanding of phenotypic evolution. Traits may covary due to several possible …
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The influence of vicariance and dispersal on the diversification and evolution of springtails (collembola)
… remain elusive. Identifying and understanding evolutionary processes responsible for generating diversity is essential for understanding ecological patterns and for the development and implementation of management strategies intended to conserve biodiversity. My dissertation research is focused …
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EPIDEMIOLOGIA GENOMICA DELLE PRINCIPALI VARIANTI DI SARS-COV-2 CIRCOLANTI IN ITALIA PRIMA E DURANTE L'ERA OMICRON
… analysis, which is based on the combination of evolutionary, epidemiological, and immunological characteristics influencing the shape of a viral phylogeny, has become an increasingly important tool in the molecular surveillance of infections, particularly those due to emerging viruses. The …