Search for dissertations about: "NATURAL-POPULATIONS"

Showing result 1 - 5 of 91 swedish dissertations containing the word NATURAL-POPULATIONS.

  2. 1. 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

  4. 2. 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

  5. 3. Host-Parasite Interactions in Natural Populations

    Author : Peter Halvarsson; Jacob Höglund; Carles Vilà; Stuart Piertney; Zooekologi Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arvicola terrestris; avian malaria; balancing selection; Major histocompatibility complex; parasitetranscriptome; Populationsbiologi; Population Biology;

    Abstract : Parasitism is one of the most common ways of living and it has arised in many taxa. Parasites feed and live inside or on their hosts resulting in both long and short term consequences for the host. This thesis is exploring the phenotypic and genotypic effects of animals living with parasitic infections. READ MORE

  6. 4. Genetics and ecology of natural populations

    Author : Elisabeth Lundqvist; Ulf Lagercrantz; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Angelica archangelica; Bistorta vivipara; Viscaria alpina; Eiseniella tetraedra; ecotypes; hydrochory; genetic differentiation; clone diversity; genetic patterns; riparian;

    Abstract : I have studied the genetic variation of single species using morphological variation and enzyme electrophoresis. I have striven to understand the interaction between the breeding structure and the ecology of the species in relation to the community, in which it lives. The work was done in the county of Västerbotten, northern Sweden. READ MORE

  7. 5. Dispersal, inbreeding and fitness in natural populations

    Author : Bengt Hansson; MEMEG; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; immigration; inbreeding; inbreeding depression; heterozygosity; microsatellite; great reed warbler; bird; Djurekologi; Animal ecology; philopatry; heritability; founder event; dispersal; bottleneck;

    Abstract : To evaluate how inbreeding affects the viability of small populations, it is crucial to determine what constitutes a population (i.e., the number of breeders in local patches and the degree of dispersal), and also to estimate the reproductive consequences of philopatry and emigration. READ MORE