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 452 for “"Population structure"”.
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Population Structure of Limenitis Butterflies in Hickman, Kentucky
Two species of Limenitis butterflies occur along the Mississippi River at Hickman, Kentucky: the viceroy, L. archippus, and the red-spotted purple, L. arthemis astyanax. Limenitis archippus occurs at a frequency that is 10-30 times more abundant than its congener, L. arthemis astyanax. …
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Growth, reproductive phenology, and population structure in Syntrichia caninervis
Syntrichia caninervis is a dioicous bryophyte of the arid Southwest. It exhibits a phenology and growth rate similar to the related species Tortula inermis. Mean growth rate was 0.29 mm +/- 0.04 (mean and S.D.). Expressing stems had a significantly greater growth rate than non-expressing stems, but …
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Genetic diversity and population structure of Vaccinium vitis-idaea
… genetic diversity. We assessed the clonal structure and genetic diversity in wild populations of lingonberry (Vaccinium vitis-idaea). This survey included 195 individual samples across 15 populations, assayed at 18 nuclear microsatellite loci to reveal the sexual and asexual reproductive …
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Ecology and population structure of Vibrionaceae in the coastal ocean
… This thesis investigates to what extent populations of the gamma-proteobacterial family, Vibrionaceae, are ecologically specialized by investigating the distribution across a wide range of environmental categories, such as marine invertebrates or particles in the water column. …
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Introgression, Population Structure, and Systematics of the Sphagnum capillifolium complex
… and historical events affect patterns of population divergence and gene flow is an important question in evolution and biogeography. Sphagnum subgenus Acutifolia is one of the four major subgenera of Sphagnum peatmoss comprising numerous species with broad geographic ranges and diverse …
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Population structure and genetic variation in Hector’s dolphin (Cephalorhynchus hectori)
… as a tool to uncover information about the population structure and genetic variation in Hector’s dolphin (Cephalorhynchus hectori), to track population declines and to assess the evolutionary origins and taxonomic status of this species. A high-resolution genetic analysis of population …
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Population Structure, Aggressiveness, and Molecular Genetic Variability of Sclerotinia Sclerotiorum
Population structure, isolate aggressiveness, and molecular genetic variability of Sclerotinia sclerotiorum (Lib) de Bary was investigated. Population structure was determined by mycelial compatibility grouping (MCG). MCG and aggressiveness of S. sclerotiorum isolates from diverse hosts and …
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Ecology and population structure of vibrionaceae in the coastal ocean
… This thesis investigates to what extent populations of the gamma-proteobacterial family, Vibrionaceae, are ecologically specialized by investigating the distribution across a wide range of environmental categories, such as marine invertebrates or particles in the water column. …
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Hypervariable DNA markers and population structure in three fish species
… of hypervariable DNA polymorphisms as a general population genetics method was studied in three fish species by the use of multilocus DNA fingerprinting. Laboratory lines and field caught specimens from Belize and Florida of the clonal species <i>Rivulus marmoratus</i> were examined to determine …
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Human mitochondrial DNA and population structure of the Western Mediterranean Islands
… geographic isolation have shaped the genetic structure of insular populations over time. A total of 27 newly generated complete ancient mitogenomes (17 from Sardinia and 10 from Sicily), spanning from the Neolithic to the 16th century, were analyzed together with 105 modern mtDNA genomes from …
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Genetic diversity and population structure within Botswana: association with HIV-1 infection
… the high burden of HIV-1 in Botswana, the population of Botswana is significantly underrepresentation in genomics studies of HIV-1. Furthermore, the bulk of previous genomics studies evaluated common human genetic variations, however, there is increasing evidence of the influence of rare …
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Detectability, movement, and population structure of the endangered Candy Darter in Virginia
… ranges, which often results in isolated populations. The Candy Darter Etheostoma osburni was recently listed as Endangered and may represent a suite of other imperiled fishes in terms of their ecology, life-history traits, and conservation needs. I examined the effects of microhabitat …
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Population Structure and Demographic History of Human Arctic Populations Using Quantitative Cranial Traits
… an excellent laboratory for examining human population movement and differentiation. This research utilizes cranial morphological variation from 27 discrete Arctic populations spread across the North American Arctic to examine the role that culture and migration may have played in defining …
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Population Structure of Yellow Fever Virus: Influence of Viral Diversity on Vaccine Attenuation
… the lifecycle of RNA viruses have indicated that population structure of these viruses is in many cases complex, which in itself may confer fitness within hosts or host ecologies. Thus, these dissertation studies were performed under a set of hypotheses that the YFV population structure is in …
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Genetic population structure and dispersal of two North American woodpeckers in ephemeral habitats
… among static habitat patches shapes the genetic structure of species.</p> <p>I examined patterns of genetic variation in mtDNA and microsatellites in both black-backed and hairy woodpeckers to determine large-scale spatial structure. Black-backed woodpeckers have high genetic connectivity across …
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Genetic population structure and dispersal of two North American woodpeckers in ephemeral habitats
… among static habitat patches shapes the genetic structure of species.</p> <p>I examined patterns of genetic variation in mtDNA and microsatellites in both black-backed and hairy woodpeckers to determine large-scale spatial structure. Black-backed woodpeckers have high genetic connectivity across …
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Population structure of the cyanobacterium Microcystis mediated by history, grazing and interstrain interactions
… have shown that naturally occurring Microcystis populations are generally composed of several genotypes. Although these blooms have been extensively studied, little is known about the mechanisms generating local and regional diversity of Microcystis bloom populations nor about the factors …
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MICROSATELLITE ANALYSIS OF POPULATION STRUCTURE IN THE SANTA ANA SPECKLED DACE (RHINICTHYS OSCULUS)
… to examine the patterns of genetic variation and population structure that occurred within and among the watersheds in the Southern California. The study also examined the regional relationships among Southern California, Central California and Owen’s River Valley. Analysis of the microsatellite …
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A molecular analysis of the population structure, mating system and demography of Eucalyptus
… aimed to study the evolutionary forces affecting populations of Eucalyptus, with special emphasis on the compounds implicated in plant defence, notably terpenes. In Chapter 1, I explored the genetic structure in Eucalyptus globulus to understand how processes such as gene flow and genetic drift …
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