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Visar resultat 1 - 5 av 154 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Pawsitive selection : Genetics of dog-human communication

    Författare :Mia Persson; Per Jensen; Lina Roth; Dominic Wright; Ádám Miklósi; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Through domestication and recent selection, dogs have evolved a unique set of communicative skills to attract and redirect human attention. These social skills have not been seen to the same extent in socialised wolves and are therefore believed to have a significant genetic basis. LÄS MER

  3. 2. Disentangling small genetic differences in large Atlantic herring populations: comparing genetic markers and statistical power

    Författare :Lena C. Larsson; Linda Laikre; Nils Ryman; Lorenz Hauser; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conservation genetics; marine fish; spatial and temporal genetic variation; molecular marker comparison; allozyme; microsatellite; selection; fisheries management; Biology; Biologi; populationsgenetik; Population Genetics;

    Sammanfattning : Genes are the foundation of evolution and biodiversity. The genetic structure of natural populations needs to be understood to maintain exploited resources rationally. This thesis focuses on genetic variability and methods to determine spatial and temporal genetic heterogeneities. LÄS MER

  4. 3. Multiplex markers in a plant breeding perspective

    Författare :Mats Hansen; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant biochemistry; plant breeding; SNP; RAPD; molecular markers; AFLP; Växtbiokemi;

    Sammanfattning : Plant breeding is largely depending on the repeated selection for desirable traits. This process is both time and labour consuming, making the development of commercial plant varieties a slow and costly activity. LÄS MER

  5. 4. 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

  7. 5. Marcadores metadiscursivos, fluidez y participación conversacional en español L2 : La evolución de la competencia comunicativa durante la estancia en una comunidad de la lengua meta

    Författare :Helena Lindqvist; Lars Fant; Estrella Montolío Durán; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Second language acquisition; metadiscourse markers; fluency; disfluency; conversational participation; spoken L2 Spanish; individual differences; Spanish; spanska;

    Sammanfattning : This study investigates the acquisition and use of metadiscourse markers in learners/users of L2 Spanish and the role these markers play in the development of fluency and conversational participation during a five-month stay in Spain as exchange students of business administration.The study has been conducted in three steps. LÄS MER