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 5 of 5 for “"asexual populations"”.
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Genomic evidence of long-term asexuality at the northern range limit of wetland plant, Decodon verticillatus (Lythraceae)
Many plant species shift from sexual to asexual reproduction at geographic range edges, but the impact of asexual reproduction on range expansion is largely unknown. If asexuality allows genotypes well-adapted to range edge conditions to persist long-term without recombination, this may allow plant …
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Evolutionary Instability Of Genomic Mutation Rate In Rapidly Adapting Asexual Mutator Escherichia Coli Populations
… higher mutation rates (mutators) can fix in asexual populations through a process called ‘mutator hitchhiking’. Theory predicts that repeated mutator hitchhiking can occur in an adapting asexual mutator population. I tested this prediction in two settings: a mutL- population under lethal …
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Correlated evolution in experimental populations of yeast
Replicate haploid and diploid lineages of the yeast <italic>Saccharomyces cerevisiae</italic>, selected for ∼5000 generations in a glucose-limited environment, were used to study correlations among life-history traits and fundamental questions about phenotypic evolution. As expected, growth …
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Bioluminescence-Based High Precision Bacterial Growth Rate Measurements and Their Potential Application in Quantifying Deleterious Effects of High Mutation Rates
… rare beneficial mutations sweep through large asexual populations. Our simulations suggest that this is indeed the case at high mutation rates (~200-fold higher than the wild-type mutation rate), but the deleterious effects are expected to be quite small (~1%). Detection of such effects …
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Evolution of reproductive mode in the scaly-winged bark louse Echmepteryx hageni
… the relationship between genetic diversity and asexuality has received recent attention, the precise nature of this relationship is dependent on the physiological mechanism (e.g. automixis vs. apomixes) and the details of the origin (e.g. endosymbiont infection or hybridogenesis) of asexual …