Sökning: "Population genetic"

Visar resultat 6 - 10 av 1278 avhandlingar innehållade orden Population genetic.

1. 6. Genomics of population decline

   Författare :Tom van der Valk; Katerina Guschanski; Aylwyn Scally; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; genetic diversity; minimal-invasive samples; population decline; inbreeding; genetic purging; eastern gorillas; Dryas monkey; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : With human populations forecasted to grow in the next decades, many mammals face increasing anthropogenic threats. The consequential population declines are a precursor to extinctions, as small populations are not only more sensitive to stochastic events, but reduction in population size is generally also followed by a decrease in genetic diversity, which in turn reduces adaptive potential and fitness of the population. LÄS MER

3. 7. Population genetic studies of psoriasis

   Författare :Annica Inerot; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; psoriasis; population genetics; age of onset; family studies; associated diseases; clinical examination; arthritis; HLA-Cw6;

   Sammanfattning : Psoriasis is a genetically determined, common skin disease affecting about 3 % of the population. The inheritance pattern has earlier been unclear. In collaboration with the Swedish Psoriasis Association, we have collected information on the occurrence of psoriasis in the families of 11,366 members of the Association. LÄS MER

4. 8. Advances in studying the role of genetic divergence and recombination in adaptation in non-model species

   Författare :Ramprasad Neethiraj; Christopher Wheat; Sören Nylin; Mathieu Joron; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Recombination; Genetic divergence; Lepidoptera; Genetic variation; Genetic diversity; Holocentric chromosomes; cis-regulatory variation; Allele-specific expression; populationsgenetik; Population Genetics;

   Sammanfattning : Understanding the role of genetic divergence and recombination in adaptation is crucial to understanding the evolutionary potential of species since they can directly affect the levels of genetic variation present within populations or species. Genetic variation in the functional parts of the genome such as exons or regulatory regions is the raw material for evolution, because natural selection can only operate on phenotypic variation already present in the population. LÄS MER

5. 9. Monitoring gene level biodiversity - aspects and considerations in the context of conservation

   Författare :Johan Charlier; Linda Laikre; Nils Ryman; Kjetil Hindar; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; brown trout; conservation genetics; genetic drift; genetic monitoring; effective population size; moose; one-sample approach; spatial genetic structure; statistical power; temporal data; populationsgenetik; Population Genetics;

   Sammanfattning : The objectives of this thesis relate to questions needed to be addressed in the context of genetic monitoring for implementing the Convention on Biological Diversity for the gene level. Genetic monitoring is quantifying temporal changes in population genetic metrics. LÄS MER

7. 10. Genetic variation in structured populations

   Författare :Marina Rafajlovic; Göteborgs universitet; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER