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 20 of 316 for “"population genetics"”.
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Statistical approaches to population genetics
… is concerned with the statistical approach to population genetics. The genetical characteristics of the population under consideration are the population size and the gene frequencies. The limitations on the population are (a) the individuals are either all haploids or all diploids; (b) the …
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African elephant conservation and population genetics
… habitat destruction. The field of conservation genetics aims to reduce the rate and severity of species decline by better understanding their genetics and making relevant information available to conservation and management entities. African elephants are in decline and the research here aims to …
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Population genetics of the genus Transennella (Bivalvia)
… computed for the two morphotypes and for two populations of each morphotype. The I and D values derived from intraspecific comparisons of Transennella tantilla populations are 0.99 and 0,004; for Transennella sp., the I value is also 0.99 and D is 0,002. The I and D values obtained from …
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Population genetics of the koala (Phascolarctos cinereus)
… due to increasing growth of the human population. The goals of this study were: 1) to assess genetic diversity of the koala and 2) to determine the genetic structure of the koala. To achieve these goals, we sequenced 648 base pairs (bp) of the mitochondrial control region and developed …
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Population genetics of herbicide resistance in waterhemp
Waterhemp populations resistant to herbicides that inhibit protoporphyrinogen oxidase (PPO) have been identified throughout the Midwest and the mechanism of resistance in populations from Illinois was previously determined to result from a 3 base pair deletion in the protoporphyrinogen oxidase …
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Evolution and population genetics of Prochlorococcus marinus
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995, and Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1995.
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Population Genetics and Conservation of Texas Hill Country Eurycea
… and nuclear sequence variation of seven Eurycea populations to address the following questions: 1) to what extent does gene flow occur among these populations?, 2) do river systems or aquifers serve as conduits for gene flow in this system?, and 3) what is the status of each population, measured …
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The population genetics of Festuca rubra on park grass
… the frequency of sexual reproduction within populations to increase with rate of environmental change. The study described here investigates the potential correlation between mode of reproduction and rate of environmental change in red fescue, <i>Festuca rubra</i>, a clonal/sexual species of …
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Population genetics and conservation of the endemic Mus cypriacus.
… as well as a poor understanding of its genetic population structure. Using the mitochondrial D-loop, single nucleotide polymorphisms and microsatellite data, I investigated the genetic diversity of M. cypriacus, the genetic structure of different M. cypriacus populations and tested for possible …
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Conservation and population genetics of African and Asian rhinoceros
… disruption, have led to steep declines in the population size of all rhinoceros species, placing them in danger of extinction. The development of genetic markers for assessment of diversity at neutral and adaptive loci can be used to address a number of questions that will aid in the …
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Population genetics of the Illinois chorus frog (Pseudacris illinoensis)
… This suggests the potential presence of subtle population structure at the regional scale. Detection of low heterozygosity and slight population structure between clusters indicate low levels of gene flow and philopatric behavior in the ICF. The heavily agricultural nature of the study areas …
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Mitochondrial genomics and Northwestern Atlantic population genetics of marine annelids
… to investigate marine benthic invertebrate phylogenetics and population genetics, focused on the phylum Annelida. Recent expansions of molecular methods and the increasing diversity of available markers have allowed more complex and fine-scale questions to be asked at a variety of taxonomic …
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Mitochondrial genomics and northwestern Atlantic population genetics of marine annelids
… to investigate marine benthic invertebrate phylogenetics and population genetics, focused on the phylum Annelida. Recent expansions of molecular methods and the increasing diversity of available markers have allowed more complex and fine-scale questions to be asked at a variety of taxonomic …
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Population genetics of Michaux's sumac, smooth sumac, and their hybrids
… United States, with two of the largest populations located at Maneuver Training Center--Fort Pickett, VA (Fort Pickett), and a nearby property, Deepwater. Michaux's sumac requires soil disturbance and fire to maintain healthy populations. Before being added to the endangered species …
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Addressing Insect Declines Via Biodiversity Monitoring, Ecological Restoration, and Population Genetics
… are major knowledge gaps concerning ecology, population genetics, and responses to management practices. Recently reported global declines in insect abundance, biomass, and diversity suggest a pressing need to fill these knowledge gaps. Here, I present work that address these knowledge gaps by …
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POPULATION GENETICS OF COWNOSE RAYS, RHINOPTERA SPP. IN THE WESTERN ATLANTIC
… (NWA), and was the first study to examine population structure in <em>R. brasiliensis </em>within the NWA or northern Gulf of Mexico (GMX), revealing novel insights into the population biology of the animal and extending its range by nearly 1,500 km. This study also examined the …
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Population Genetics and Speciation in the Plant Genus Silene (section Elisanthe)
This thesis is concerned with speciation and population genetics in the plant genus Silene (section Elisanthe). The introductory chapter is a literature review covering characteristics of the species studied, and the current literature on their evolutionary dynamics and population genetics. The …
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Asymptotic Analysis of Some Stochastic Models from Population Dynamics and Population Genetics
… that laid the foundation for contemporary population genetics. The Wright-Fisher model and its extensions have given biologists powerful tools of statistical inference that enabled the quantification of genetic drift and selection. Given the utility of these tools, we often forget that …
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