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 33 for “"Populus trichocarpa"”.
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Evolutionary Genomics of Populus trichocarpa (Western Poplar)
… of demography and selection in the genome of Populus trichocarpa, a riparian deciduous tree species of North America. Specifically, I used a variety of methods to summarize patterns of genetic diversity and population structure in P. trichocarpa, and to reconstruct its demographic history. I …
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Analysis of genetic variation in Pediculus humanus and Populus trichocarpa
… humanus corporis and the black cottonwood, Populus trichocarpa. While unrelated, these two organisms each represent a study system with questions that challenge our current understanding of each organism. Body and head lice, while closely related, are thought to be separate species with …
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Genomic Selection and Genome-Wide Association Study in Populus trichocarpa and Pinus taeda
… flush, height, and bud set) in a population of Populus trichocarpa and for height, diameter, and stem straightness in Pinus taeda. GEBVs accuracies were estimated using a ridge regression–best linear unbiased prediction (rrBLUP) model, and these accuracies were compared with estimated …
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Characterization of signaling pathways underlying key growth and development processes in Populus trichocarpa
… goals for this dissertation were to manipulate Populus trichocarpa source-sink relationships to optimize this woody crop species for specific agricultural traits such as increased growth rate, stress tolerance and/or improvements in overall biomass accumulation. We targeted specific tissues such …
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Patterns of Population Structure and Hybridization within and between Populus trichocarpa and Populus balsamifera
The genus Populus consists of many ecologically and economically important forest tree species. Their rapid growth makes them one of the most productive hardwoods growing in temperate latitudes. Populus spp. frequently hybridize where their ranges overlap, and poplar hybrids are the most frequently …
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Analyzing genetic response mechanisms associated with copper homeostasis in Populus trichocarpa using a bioinformatics approach
… by analyzing the transcriptomic response of Populus trichocarpa to copper deficiency in four vegetative organs and applies this knowledge to the study of multi-copper oxidases. Organs have drastically different responses to copper deficiency with few genes being systemically differentially …
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Water-use efficiency and productivity in native Canadian populations of Populus trichocarpa and Populus balsamifera
… efficiency within four selected populations of Populus trichocarpa and Populus balsamifera (2 provenances each). Each species included both a northern and a southern provenance. Correlations between water-use efficiency, nitrogen-use efficiency, ¹³C/¹²C isotope ratio, stomatal conductance, and …
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Discovery of New Protein-DNA and Protein-Protein Interactions Associated With Wood Development in Populus trichocarpa
The negative effects from rising carbon levels have created the need to find alternative energy sources that are more carbon neutral. One such alternative energy source is to use the biomass derived from forest trees to fulfill the need for a renewable alternative fuel. Through increased …
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Functional analysis of novel protein-protein interactions involving ROP GTPases in Arabidopsis thaliana and Populus trichocarpa
… library were selected from approximately 400 Populus trichocarpa genes that are at least 8-fold more highly expressed in differentiating secondary xylem versus phloem-cambium, and designated here as poplar biomass (PB) genes. Here we report some of the interactions involving selected PB …
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Signatures of natural selection and local adaptation in Populus trichocarpa and Populus deltoides along latitudinal clines
… to identify signatures of natural selection in Populus trichocarpa and P. deltoides. Using both frequency spectrum based tests and tests of heterogeneity, I identified genetic variants deviating from selective neutrality. Results reveal that photoreceptors and dormancy regulator genes may have …
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Partitioning of multivariate phenotypes using regression trees reveals complex patterns of adaptation to climate across the range of black cottonwood (Populus trichocarpa)
… in adaptive traits. We used black cottonwood (Populus trichocarpa) as a model to characterize the interplay between geography, climate, and adaptation to abiotic factors. Twelve traits (height, diameter, volume index, crown diameter, number of branches, number of sylleptic branches, relative …
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Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis
… effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis</bold> Jenny L. Knoth Chair of the Supervisory Committee: Associate Professor, Dr. Sharon L. Doty School of Environmental and Forest Sciences Sustainable production of biomass for bioenergy relies on low …
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Architecture and Evolution of Xylem-related Gene Coexpression Networks in Poplars
… to indentify the genes in wood formation of Populus trichocarpa with the help of the other novel bioinformatics tools such as Gene Ontology and Cytoscape. In order to booster the accuracy of the findings, we have combined it with an evolutionary approach, synonymous and non-synonymous ratio …
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The Missoula Poplar Project: Utilizing Poplars to Enhance Wastewater Treatment
… stem cuttings of two hybrid poplar species, Populus deltoides X Populus trichocarpa and Populus deltoides X Populus nigra, and the native Black Cottonwood, Populus balsamifera ssp. trichocarpa. The effects of effluent fertilization on poplar growth, soil and ground water nutrient contents …
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The Missoula Poplar Project: Utilizing Poplars to Enhance Wastewater Treatment
… stem cuttings of two hybrid poplar species, Populus deltoides X Populus trichocarpa and Populus deltoides X Populus nigra, and the native Black Cottonwood, Populus balsamifera ssp. trichocarpa. The effects of effluent fertilization on poplar growth, soil and ground water nutrient contents …
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Promoter Deletion Analysis of Xylem Cysteine Protease 2 (XCP2) in Arabidopsis thaliana
… XCP2 homologs from Zinnia elegans, Populus trichocarpa, and XCP1 from Arabidopsis thaliana.
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Appalachian Surface Mine Reforestation Techniques: Effects of Grading, Cultural Treatments and Species Selection
… had the best survival and hybrid poplar (Populus deltoides x Populus trichocarpa) produced the most biomass. Hybrid American chestnuts survived and grew better when planted as bare-root seedlings than when planted as ungerminated nuts in tree tubes, demonstrating the potential for planting …
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Physiology, genetics and genomics of drought adaptation in Populus
As the demand for energy rises, Populus species are increasingly grown as bioenergy crops. Meanwhile, due to global change, predictions indicate that summer droughts will increase in frequency and intensity over Europe. This study was carried out to evaluate the adaptation to drought in Populus, at …
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Influence of Mycorrhizal Inoculation Treatments on Native Tree and Shrub Survival in a Floodplain, Flathead Indian Reservation
… a control treatment on biomass and survival of Populus tremuloides, Salix bebbiana, Populus trichocarpa, and Cornus stolonifera during the summer of 2003 and 2004. Because these seedlings are difficult to establish on cobbled riparian floodplains, the species and treatments were tested on two …
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Cottonwood Establishment in a Gravel-Bed River
… the processes of establishment of the cottonwood Populus trichocarpa T.&G. along the pristine, 5th order, wandering floodplain of the gravel-bed Flathead River, Montana, USA. The focus of my research was to determine the mechanisms explaining successful recruitment on recently formed, unvegetated …
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