Dissertations / Theses on the topic 'Variation (Genetics)'
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De, Bustos Cecilia. "Genetic and Epigenetic Variation in the Human Genome : Analysis of Phenotypically Normal Individuals and Patients Affected with Brain Tumors." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6629.
Full textWalker, Tina Kay. "Genetic variation in schistosomes." Thesis, Brunel University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278245.
Full textPandya, Arpita. "Human Y-chromosomal DNA variation." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298658.
Full textKeightley, Peter D. "Studies of quantitative genetic variation." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/12340.
Full textLoh, Yong-Hwee Eddie. "Genetic variation in fast-evolving East African cichlid fishes: an evolutionary perspective." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41148.
Full textRoussos, Athanasios. "Morphological variation, population genetics and genetic relatedness in three species of Callopora." Thesis, Swansea University, 2007. https://cronfa.swan.ac.uk/Record/cronfa42590.
Full textGunn, Melissa Rose School of Biological Earth & Environmental Science UNSW. "The use of microsatellites as a surrogate for quantitative trait variation in conservation." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Science, 2003. http://handle.unsw.edu.au/1959.4/22457.
Full textRudd, Danielle Song. "Genomic copy number variation in schizophrenia." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/4739.
Full textCotsapas, Chris Biotechnology & Biomolecular Sciences Faculty of Science UNSW. "The genetics of variation in gene expression." Awarded by:University of New South Wales. School of Biotechnology and Biomolecular Sciences, 2005. http://handle.unsw.edu.au/1959.4/30204.
Full textBromham, Lindell. "Rate variation in DNA sequence evolution." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339362.
Full textRootsi, Siiri. "Human Y-chromosomal variation in European populations /." Tartu : Tartu University Press, 2004. http://dspace.utlib.ee/dspace/bitstream/10062/1252/5/rootsi.pdf.
Full textGoropashnaya, Anna. "Phylogeographic Structure and Genetic Variation in Formica Ants." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3803.
Full textEhrenreich, Ian Michael. "The Genetics of Phenotypic Variation in Arabidopsis thaliana." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-08062008-162151/.
Full textRussell, Joanne Ritchie. "Molecular variation in Theobroma species." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386981.
Full textMathieson, Iain. "Genes in space : selection, association and variation in spatially structured populations." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:85f051b6-2121-49cf-9468-3ca7ba77cc4a.
Full textGresham, David J. "Genetic variation and disease in the Roma (Gypsies)." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2001. https://ro.ecu.edu.au/theses/1516.
Full textMurtagh, Gareth James. "Sex and variation in lichen-forming fungi." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285566.
Full textArcher, Jason Allan. "Genetic variation in the efficiency of feed utilisation by animals." Title page, table of contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09pha6711.pdf.
Full textRogell, Björn. "Genetic variation and local adaptation in peripheral populations of toads." Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107395.
Full textElis, Mabon. "Evolutionary genetics of flower colour variation in Antirrhinum." Thesis, University of East Anglia, 2018. https://ueaeprints.uea.ac.uk/69572/.
Full textStewart, John E. B. (John Edward Bakos). "Genetic Variation in a Population of the Plains Woodrat Neotoma micropus." Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc500709/.
Full textRowell, Jennie Lynn. "GENETIC VARIATION IN THE DOMESTICATED DOG AS A MODEL OF HUMAN DISEASE." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338237356.
Full textHamilton, Katherine Elaine. "Structural and regulatory gene variation in Salmonid fishes." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356872.
Full textDe, Winter Gunnar. "The ecology and evolution of individual behavioural variation." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/44995/.
Full textKvernes, Macpherson Carina. "Studying genetics of leaf shape variation in Arabidopsis lyrata." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160116.
Full textFredman, David. "Computational exploration of human genome variation /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7140-025-7/.
Full textPatel, Tulsi. "Investigating genetic variation in Alzheimer's disease." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52447/.
Full textScheet, Paul A. "A flexible and computationally tractable model for patterns of population genetic variation/." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/8932.
Full textMarcar, Nico Emile. "Genotypic variation for manganese efficiency in cereals /." Title page, abstract and contents only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phm313.pdf.
Full textYoung, J. R. "The molecular genetics of antigenic variation in Trypanosoma brucei." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372285.
Full textForsberg, Lena. "Genetic variation and regulation of oxidative stress related genes /." Stockholm, 2000. http://diss.kib.ki.se/2000/91-628-4241-2/.
Full textSharkey, Andrew M. "Genetic variation in the rodent malaria parasite Plasmodium chabaudi." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/14391.
Full textCardno, Alastair George. "The quantitative genetics of clinical variation in psychotic illnesses." Thesis, Cardiff University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394591.
Full textWhiteley, Rachel. "Quantitative and molecular genetic variation in Ulmus laevis Pall. /." Uppsala : Dept. of Plant Biology and Forest Genetics, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/s313.pdf.
Full textOchola, Harold Martin Owino. "Using genomics and population genetics to understand genetic variation in Malawi Plasmodium falciparum clinical isolates." Thesis, University of Liverpool, 2013. http://livrepository.liverpool.ac.uk/15753/.
Full textModin, Helena. "Multiple sclerosis : linkage analysis and DNA variation in a complex trait /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-792-4/.
Full textShringarpure, Suyash. "Statistical Methods for studying Genetic Variation in Populations." Research Showcase @ CMU, 2012. http://repository.cmu.edu/dissertations/117.
Full textLee, Peter Daniel. "Building a model for mapping genetic variation affecting gene expression." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85931.
Full textWhittaker, S. L. "Genetics of P. infestans - variation in DNA content and ploidy." Thesis, Bangor University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280024.
Full textYue, Wei. "Characterization of genetic variation in secondary metabolites in Fusarium." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/36235.
Full textGenetics Interdepartmental Program
Christopher Toomajian
Secondary metabolites (SMs), low molecular weight molecules that are not essential for normal organism growth and development, may confer a selective advantage in some environments. Fungal SMs are structurally and functionally diverse and include mycotoxins, plant regulators and pigments, and the genes that work together in SM biosynthetic pathways are physically clustered in the genome. Fusarium, a genus of filamentous fungi, is noted for SM production, especially mycotoxins, which may contribute to plant pathogenesis. Fusarium species exhibit differences in their SM profiles, and comparative genomics studies have found corresponding differences in the SM gene clusters in some Fusarium species. The investigation of differences in the genomes and SM gene clusters between closely related species, such as F. proliferatum and F. fujikuroi, may help explain their phenotypic divergence, including differences in SM profiles. In addition, the study of intra-species SM variation may indicate how SM loci affect a pathogen’s fitness traits. My research includes three main projects that address different aspects of Fusarium SM variability. To carry out my projects, I established a feasible Genotyping-by-Sequencing (GBS) protocol for Fusarium. One project explored the genetic bases underlying phenotypic divergence related to SM profiles and pathogenicity between F. proliferatum and F. fujikuroi using a quantitative genetics approach. Specifically, I 1) constructed the first high density genetic map based on progeny from an interspecific cross between these two species; and 2) detected a novel regulatory locus for gibberellic acid production and identified a region affecting onion virulence that includes the fumonisin gene cluster. The second project characterized the F. proliferatum parent genome from the previous cross and its SM gene clusters using a comparative genomics approach. Specifically, I 1) assembled the F. proliferatum genome into 12 chromosomes with a combined length of ~43 Mb; 2) annotated this assembly and characterized its 50 SM gene clusters; and 3) detected over 100 F. proliferatum specific genes that might play roles in this species’ host specificity and plant pathogenicity. The third project used a population genomics approach to explore how different F. graminearum chemotypes, or isolates classified based on the accumulation of alternate trichothecene toxin types, may differ for fitness traits and whether trichothecene genes are directly responsible for these differences. Specifically, I 1) genotyped over 300 F. graminearum strains from New York and the upper Midwest in the U.S. and from South America using our GBS protocol; 2) detected two major subpopulations that were correlated, though imperfectly, to the predicted 3-acetyl deoxynivalenol (3ADON) and 15-acetyl deoxynivalenol (15ADON) chemotypes in the U.S.; 3) identified a rapid linkage disequilibrium decay over a few tens of kb followed by a slower decay to background levels over a distance of 200 kb to 400 kb in selected subpopulations in the U.S.; and 4) found that neither chemotype has a clear fitness advantage in a small set of isolates from New York, but that isolates belonging to one genetic subpopulation may on average have a fitness advantage over isolates from the other subpopulation.
Judson, Olivia P. "Parasites, sex and genetic variation in a model metapopulation." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296922.
Full textGoulson, David. "Maintenance of phenotypic variation in the butterfly, Maniola jurtina." Thesis, Oxford Brookes University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293305.
Full textSmith, Thomas C. A. "Within genome variation of germ-line and somatic mutation." Thesis, University of Sussex, 2017. http://sro.sussex.ac.uk/id/eprint/68212/.
Full textSSEKIMPI, PUPULIO SSEMOMBWE NKUNA ABBY. "CHROMOSOME VARIATION IN DROSOPHILA SPECIES OF THE MULLERI COMPLEX." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183809.
Full textKing, Rachel, and n/a. "Spatial Structure and Population Genetic Variation in a Eucalypt Species Complex." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050113.091713.
Full textKing, Rachel. "Spatial Structure and Population Genetic Variation in a Eucalypt Species Complex." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/365496.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
Full Text
Barrera, Luis A. "Towards a Systematic Approach for Characterizing Regulatory Variation." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:26718710.
Full textBiophysics
Sawyer, Sarah Lynn. "Using SNPs to study complex genetic disease : a population and evolutionary genetics perspective /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-967-6/.
Full textWahyuni, Wiwiek Sri. "Variation among cucumber mosaic virus (CMV) isolates and their interaction with plants." Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phw137.pdf.
Full textJohansson, Åsa. "Genome Variation in Human Populations : Exploring the Effects of Demographic History and the Potential for Mapping of Complex Traits." Doctoral thesis, Uppsala University, Department of Genetics and Pathology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7293.
Full textA major challenge in human genetics is to understand the genetic variation underlying common diseases. In this thesis, I focus on forces creating differences between individuals and genomic regions, methods for characterizing genomic variation, and the association between genomic and phenotypic variation. Genetic markers are widely used to locate genes associated with different phenotypes. In my first paper, I describe novel algorithms for automatic genotype determination of microsatellite markers, a procedure which is currently both time-consuming and error prone.
The co-segregation of genetic markers in a population leads to non-random association of alleles at different loci - linkage disequilibrium (LD). LD varies throughout the genome and differs between populations due to factors such as their demographic history. In my second paper, I discuss the increased power, for mapping of human traits, that results from studying a population with appreciable levels of LD such as is found in the Swedish Sami population.
Lately, large-scale analyses of single nucleotide polymorphisms (SNPs) have become available and efforts have been made to identify a set of SNPs, which captures most of the genome variation in a population (tagSNPs). In my third paper, I describe the limitations of this approach when applied to data from an independent population sample of randomly ascertained SNPs. The transferability of tagSNPs between populations is poor, presumably due to variation in allele frequencies and the bias towards common SNPs used in most studies.
The level of genomic variation is influenced by population structure, recombination and mutation rate, as well as natural selection. During the exodus from Africa, humans have adapted to new environmental conditions. In my fourth paper, I describe a new method for identifying genomic regions carrying signatures of recent positive selection and apply this to an available dataset of millions of SNPs.