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 45 for “"gene pool"”.
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A gene pool approach to international wildlife law
… of a new approach based on ecology and genetics. Before considering the merits of this new approach it is useflul to examine the historical development of wildlife law, the degree of protection the international community is prepared to give to wildlife and the extent to which current …
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Broadening the wheat gene pool for stem rust resistance through genomic-assisted introgressions from Aegilops tauschii
… Coss. (2n=2x=14,DD) has provided numerous genes for resistance to diseases and insect pests that attack bread wheat (Triticum aestivum L. (2n=6x=42, AABBDD). Wheat production is currently threatened by broadly virulent races of the ‘Ug99’ lineage of wheat stem rust caused by the fungus, …
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Recent advances using genetic analyses in waterhemp
… for new management options. Understanding the genetic diversity present within the A. tuberculatus gene pool, including for key traits such as non-target-site herbicide resistance and dioecy, may contribute to the advancement of effective management strategies. Inheritance, segregation, and …
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Confirming QTL for seed yield from exotic soybean germplasm
The genetic improvement of soybean (Glycine max (L.)) cultivars in North America (N.A.) has, for the most part, been accomplished by intermating elite cultivars. This breeding strategy, combined with the limited N.A. genetic base, has resulted in a very narrow gene pool. Plant introductions (PI) …
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Dna Profiling of Captive Roseate Spoonbill (Ajaia Ajaja) Populations As a Mechanism of Determining Lineage in Colonial Nesting Birds.
… to migrations from Mexican rookeries, but a gene pool reduction would be expected. Five polymorphic Spoonbill autosomal short tandem repeat (STR) loci [three (GAT)n, one (AAAG)n and one (GT)n] and one Z/W-linked microsatellite exhibiting sex-specific dimorphism were isolated and …
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Morpho-agronomic and genetic variation and segregation patterns of phaseolus vulgaris landraces from selected provinces of South Africa
… However, studies on variation in morphology and genetics among P. vulgaris landraces are limited in South Africa. Thus, this study aimed to determine the morpho-agronomic and genetic variations among P. vulgaris landraces. P. vulgaris landraces collected from the various rural communities of four …
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Use of Eelctrophoresis to Determine Populations of Pheasants in South Dakota
… effect that introduced birds have on the local gene pool could more readily be determined. The objectives of this study were to (1) determine taxonomic characteristics of South Dakota pheasants using protein electrophoresis, (2) attempt to identify populations within the state, and (3) determine …
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Evaluation of Genetic Diversity and Stability of Colocasia Cultivars Using ISSR
… (Nacogdoches, TX), cultivar assessment, genetic diversity, stability, and relationship were examined with banding patterns produced from Inter-simple sequence repeat (ISSR) markers. Comparing banding patterns of vegetatively propagated clones of each cultivar, genetic stability was …
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Self-renewal pattern-associated genes and their role in adult stem cell functions
… Fifty two self-renewal pattern associated (SRPA) genes were identified by cDNA microarray analysis with cell culture models whose self-renewal pattern could be reversibly regulated, instead of using heterogeneous ASC-enriched populations. From evaluation of whole genome transcript levels to expand …
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Silent partners and missing links : history, architecture and the challenge of the Ellis Island Immigration Museum
… southern and eastern Europe would degrade the gene pool of "old" American stock. The persistent perception of immigrants as vectors of disease that lay behind these fears did not disappear after the turn of the century. Rather, that perception evolved to embrace the belief that science would …
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Horizontal gene transfer as a cohesive force in microbial populations
… defined as groups of organisms with a shared gene pool in which adaptive genes can spread freely through natural selection. Ecology takes a less abstract view of populations and conceives of them as members of a single species that occupy the same geographical area. Among sexual eukaryotes, …
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Ancestral Paths: Redefining local genetic ancestry and its inference with application to Europeans
… genomes which gives us a snapshot of past genetic variation. We can therefore make inferences from observed genetic signatures present before historical events such as population bottlenecks and natural selection have obscured them from the modern gene pool. Ancient DNA has thus revealed …
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Il cane come modello animale spontaneo di patologie neoplastiche dell'uomo: ene Ataxia-Telangiectasia Mutated (ATM) Nnella predisposizione al cancro ed importanza dei riarrangimanti genici dei geni Ig/TCR per la diagnosi e prognosi delle malattie linfoproliferative
… including histological appearance, tumour genetics, molecular targets, biological behaviour and response to conventional therapies. Studying dogs with cancer is likely to provide a valuable perspective that is distinct from that generated by the study of human or rodent cancers alone. The …
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Human Mitochondrial DNA from 5th – 3rd Millennia BCE: An Analysis of Iberian Populations
… compared with other ancient populations, and genetic distances were calculated between ancient and modern Iberian populations. Sequencing was largely unsuccessful for the Portuguese sites due to sub-optimal sample preservation. Regionally, ancient DNA data is relatively scarce, suggesting …
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Genetic diversity of wild roses (Rosa spp.) in Europe, with an in-depth morphological study of Flemish populations
Both morphological and molecular-genetic marker analyses were used to identify the valuable populations in order to conserve the present-day gene pool of the wild roses in Europe. Therefore we aimed to expand the knowledge of the taxonomical complexity within the subgenus Rosa, especially within …
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Evaluation of fertile lines derived from the hybridization of Glycine max and G. tomentella
… is a wild, perennial relative in the tertiary gene pool of cultivated soybean G. max (2n=40). G. tomentella has been shown to have high levels of resistance to several diseases, including soybean rust and soybean cyst nematode. We successfully created hybrids of these two species and developed …
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Comparative genomic approaches for investigating evolution in the microbial and viral populations of the rumen
… the diversity and potential for horizontal gene transfer (HGT) of multiple strains of the cellulolytic rumen bacterium, Ruminococcus flavefaciens, and then by conducting a survey of rumen viral metagenome (virome) and subsequent comparison of the virome and microbiome sequences to ascertain …
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On the origin and spread of horse domestication
… process. In this thesis, I use large autosomal genetic datasets from horses sampled across Eurasia to investigate the origin and spread of horse domestication. I begin by characterising genetic diversity of horses from the Eurasian steppes and neighbouring regions, thus laying the groundwork for …
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The use of Cicer reticulatum L. for genetic improvement of cultivated chickpea
The diverse gene pool of wild chickpea (Cicer reticulatum L.) has the potential for use to improve a range of agronomically important traits in cultivated chickpea. This study was conducted to evaluate the phenotypic and genetic variations of 486 lines derived from interspecific crosses between C. …
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Conservation genetics of African elephants
… that aim at maintaining or restoring spatial and genetic connectivity between populations. In this thesis, I use a conservation genetic approach to study African elephant populations with the aim of developing methodologies and providing applications that could inform conservation planning for …
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