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Showing result 1 - 5 of 157 swedish dissertations matching the above criteria.

  2. 1. Quantitative genetic variation in declining plant populations

    Author : Maarten Ellmer; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Saxifraga granulata; Briza media; Nigella degenii; bottleneck; Inbreeding depression; founder effects; drift; quantitative genetic; diversifying selection; habitat fragmentation; small populations;

    Abstract : The ecological and genetic effects of habitat fragmentation are an issue of major concern in current conservation biology. Habitat fragmentation results in smaller habitat areas and as a consequence smaller and more isolated populations. Many habitats have become fragmented through human activities such as forestry and agricultural development. READ MORE

  4. 2. Genetic variation in structured populations

    Author : Marina Rafajlovic; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; genetic variation; varying population size; effective population size; mutation; recombination; migration; multiple paternity; geographic structure; tests of neutrality; gene tree; species tree;

    Abstract : It is widely acknowledged that the process of speciation in the presence of gene flow between different ecotypes is common in nature. However, the mechanisms underlying speciation are not understood. READ MORE

  5. 3. Genetic structure of natural populations : aspects of the association between genetical and morphological variability patterns

    Author : Ulf Lagercrantz; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; populationsgenetik; Population Genetics;

    Abstract : Most species comprise a number of more or less reproductively isolated subpopulations. These subpopulations may exhibit striking differences in morphology and ecology, and on the basis of those differences they are often given the rank of subspecies, race, stock, variety, etc. READ MORE

  6. 4. Mapping genetic diseases in northern Sweden

    Author : Elisabet Einarsdottir; Dan Holmberg; Gösta Holmgren; Ulf Gyllensten; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; isolated populations; linkage disequilibrium; linkage analysis; genome-wide scan; hereditary sensory and autonomic neuropathy; type 1 diabetes mellitus; type 2 diabetes mellitus; autoimmune thyroid disease; Genetik; Clinical genetics; Klinisk genetik; medicinsk genetik; Medical Genetics;

    Abstract : The population of northern Sweden has previously been shown to be well suited for the mapping of monogenic diseases. In this thesis we have tested the hypothesis that this population could also be used for efficient identification of risk genes for common diseases. READ MORE

  7. 5. Neurospora tetrasperma from Natural Populations : Toward the Population Genomics of a Model Fungus

    Author : Pádraic Corcoran; Hanna Johannesson; Sylvain Glemin; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Neurospora; poulation genetics; genomes; introgression; Evolutionary Genetics; Evolutionär genetik;

    Abstract : The study of DNA sequence variation is a powerful approach to study genome evolution, and to reconstruct evolutionary histories of species. In this thesis, I have studied genetic variation in the fungus Neurospora tetrasperma and other closely related Neurospora species. I have focused on N. READ MORE