Sökning: "balancing selection"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden balancing selection.

  1. 1. Pathogen-mediated selection in the immune system of rodents : Exploring selection targets, functional effects and trade-offs

    Författare :Mridula Nandakumar; Funktionell zoologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; pathogen-mediated selection; bank voles; Myodes glareolus; immune system; balancing selection; immune response; rodents; positive selection; transcriptomics;

    Sammanfattning : Pathogens cause disease and play an important role in shaping evolution of the host immune system. They create pressure on host immunity to evolve in numerous ways, most commonly by increasing divergence between species (positive selection) or increasing polymorphisms within a population (balancing selection). LÄS MER

  3. 2. Talking talent : Narratives of youth sports selection

    Författare :Magnus Kilger; Mats Börjesson; Rickard Jonsson; Mikael Quennerstedt; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; talent; selection; talent in sports; narrative analysis; narrative genre; discourse; discursively shared narratives; positioning; Child and Youth Science; barn- och ungdomsvetenskap; Samhällsvetenskap Humaniora;

    Sammanfattning : In sports, there seems to be an eternal interest in discovering young talents and refining them into elite adult athletes. The dilemma of selecting talent, while at the same time ensuring every child´s right to participate, needs to be addressed and have consequences in social practice. LÄS MER

  4. 3. Avian MHC: variation and selection in the wild

    Författare :Helena Westerdahl; MEMEG; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymorphism; balancing selection; cDNA; avian malaria; great reed warbler; Djurekologi; bird; Animal ecology; immune defence; MHC class II; Major Histocompatibility Complex; MHC class I;

    Sammanfattning : In vertebrates the Major Histocompatibility Complex (MHC) plays a central role in the specific immune defence against various pathogens. Compared with other coding genes the MHC genes exhibit an extremely high level of polymorphism that is maintained by balancing selection. LÄS MER

  5. 4. Perspectives on Software and their Priorities : Balancing Conflicting Stakeholder Views

    Författare :Sebastian Barney; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The sustainable development of a software product depends on a number of groups working together to achieve a common goal. However, each of the groups interacts with the product in different ways, and can have conflicting aims and objectives. LÄS MER

  7. 5. Evidence for adaptive variation at the genes coding for cytosolic phosphoglucose isomerase (PGIC) in Festuca ovina L

    Författare :Yuan Li; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 3-D protein structure; purifying selection; positive selection; cDNA sequences; local adaptation; alvar grasslands; Festuca ovina; Phosphoglucose isomerase; PgiC loci; SNPs; nucleotide polymorphism; horizontal gene transfer;

    Sammanfattning : The gene (Pgi) encoding the enzyme phosphoglucose isomerase (PGI) which plays a central role in the main pathways of carbon metabolism has been shown to be of adaptive significance in a wide range of different species. Earlier studies of enzyme electromorph variation in the grass Festuca ovina suggest that variation in cytosolic PGI (PGIC) may be involved in the adaptive response of F. LÄS MER