Search for dissertations about: "founder effects"

Showing result 1 - 5 of 31 swedish dissertations containing the words founder effects.

2. 1. Long QT syndrome in Sweden : founder effects and associated cardiac phenotypes

   Author : Annika Winbo; Annika Rydberg; Eric Schulze-Bahr; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Long QT Syndrome; Jervell and Lange-Nielsen Syndrome; inherited arrhythmia; founder effects; clinical genetics; haplotype analysis; mutation age; founder mutation; clinical phenotype; life-threatening cardiac events; mutation-specific; KCNQ1 gene; modifier genes; sequence variants; risk stratification; risk factor; gender; pediatrik; Pediatrics;

   Abstract : Background: We aimed to increase the knowledge regarding the familial arrhythmogenic disorder Long QT Syndrome (LQTS) and its recessive variant Jervell and Lange-Nielsen Syndrome (JLNS) in Sweden, including prevalences and clinical phenotypes. A specific focus was directed towards two KCNQ1 mutations –p.Y111C and p. READ MORE

4. 2. 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

5. 3. Early Development of New Technology-Based Firms: How Internal and External Resource Dimensions Impact and Structure the Firm

   Author : Hanna Rydehell; Chalmers tekniska högskola; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; external resources; business model; performance; early development; business environment; new technology-based firm; internal resources; founder;

   Abstract : How do founders’ and firms’ business environment impact the early development of new technology-based firms (NTBFs)? In order to answer this question, this thesis explores how internal and external resource dimensions impact and structure the early development of NTBFs. NTBFs are known for their technological innovation and their abilities to boost economic growth and development. READ MORE

6. 4. Physical and biological dispersal barriers in invasive, bloom-forming microalgae

   Author : Ingrid Sassenhagen; Enhet akvatisk ekologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dispersal barriers; microalgae; phenotypic differentiation; population genetics; priority effects;

   Abstract : For a long time microorganisms were assumed to have unlimited dispersal due to their small size and high cell numbers. Most microbial species can be transported by water currents, in water droplets by wind and attached to other organisms. 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