Sökning: "AFLP"

Visar resultat 16 - 20 av 29 avhandlingar innehållade ordet AFLP.

  1. 16. Drivers of polymorphism dynamics in pygmy grasshoppers

    Författare :Jenny Johansson; Anders Forsman; Jacob Höglund; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Evolutionary Biology; Evolutionsbiologi;

    Sammanfattning : In this thesis, I used colour polymorphism in pygmy grasshoppers as a model system to study the influence of selection, developmental plasticity, mating behaviour and gene flow on patterns of phenotypic and genetic diversity within and among populations in changing environments.Data for more than 5,000 individuals collected from natural populations showed that the incidence of black (melanic) pygmy grasshoppers was higher in burnt than in non-burnt areas, and rapidly declined over time within populations in post-fire environments. LÄS MER

  3. 17. A Phytoplankton Invasion: Population Genetics, Phylogeography, and Invasion Success of Gonyostomum semen

    Författare :Karen Lebret; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : nvasive species is a major threat to ecosystems and biodiversity. Invasions by macroorganisms have been intensively studied, but little is known concerning microbial invasions. In aquatic environments, phytoplankton, i.e. LÄS MER

  4. 18. Genetic structure and dispersal in plant populations

    Författare :Johan Fogelqvist; Martin Lascoux; Sophie Gerber; Beng-Olle Bengtsson; Uppsala universitet; []
    Nyckelord :population genetics; dispersal; structure; plant; gene flow;

    Sammanfattning : This thesis focuses on the spatial structure and methods to identify spatial structure in plants. Methods that investigate genetic structure can mainly be divided into equilibrium methods that reveal summed dispersal over many generations, and cluster methods, that reveal more recent dispersal events. LÄS MER

  5. 19. Resistance against fruit tree canker in apple : evaluation of disease symptoms, histopathological and RNA-seq analyses in different cultivars, genetic variation of Neonectria ditissima

    Författare :Marjan Ghasemkhani; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Neonectria ditissima (formerly Neonectria galligena, anamorph Cylindrocarpon heteronema) is the causal agent of fruit tree canker, which is regarded as a serious economic problem in apple production. This fungus is closely associated with mild and wet conditions, and climate therefore has an important impact on its geographic distribution. LÄS MER

  7. 20. Biodiversity in Nordic horseradish (Armoracia rusticana) : studies with respect to conservation and utilization

    Författare :Katarina Wedelsbäck-Bladh; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The biodiversity of horseradish was studied in accessions collected from old gardens in Denmark, Finland, Norway and Sweden. In total 176 accessions were collected. Horseradish, Armoracia rusticana (P. Gaertn. LÄS MER