Search for dissertations about: "divergence"

Showing result 16 - 20 of 380 swedish dissertations containing the word divergence.

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

    Author : Ramprasad Neethiraj; Christopher Wheat; Sören Nylin; Mathieu Joron; Stockholms universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 17. Cis-regulatory variation and divergence in Capsella

    Author : Kim A. Steige; Tanja Slotte; Jeff J. Doyle; Uppsala universitet; []
    Keywords : Capsella; Shepherd s Purse; cis-regulatory changes; allele-specific expression; mating system shift; floral evolution; polyploidy; positive selection; purifying selection; transposable elements; small RNA; methylation; transposable element silencing; distribution of fitness effects;

    Abstract : Cis-regulatory changes in e.g. promoters or enhancers that affect the expression of a linked focal gene have long been thought to be important for adaptation. In this thesis, I investigate the selective importance and genomic correlates of cis-regulatory variation and divergence in the genus Capsella, using massively parallel sequencing data. READ MORE

  5. 18. Genomic divergence in differentially adapted wild and domesticated barley

    Author : Girma Bedada Chala; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Genomic divergence is responsible for plant differential adaptation to diverse and contrasting environments and different biotic stresses. This thesis focuses on the analyses of the adaptive genomic divergence in wild and domesticated barley and the driving evolutionary forces, and to identify genes and genetic variation with signature of adaptive selection. READ MORE

  6. 19. A Farewell to Arms : Motivational Change and Divergence Inside FARC-EP 2002-2010

    Author : Michael Jonsson; Stefano Guzzini; Svante Cornell; Maria Heimer; Stathis Kalyvas; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Civil war; motives; motivational change; Colombia; mid-level commanders; political economy of conflict; FARC; insurgency; defections; Statskunskap; Political Science;

    Abstract : How can motivational change and divergence inside a rebel group be explained and what does this imply for our understanding of civil wars? In contemporary research, these questions have received limited attention. In many studies, motives are either overlooked, inferred from a single type of motive indicator or assumed to be narrow, static over time and homogenous throughout the organization. READ MORE

  7. 20. Polyandry and the evolution of reproductive divergence in insects

    Author : Tina Nilsson; Göran Arnqvist; David Hosken; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Bruchidae; cryptic female choice; multiple mating; sexual conflict; sexually antagonistic coevolution; sexual selection; speciation; sperm competition; Tenebrionidae; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Abstract : Multiple mating by females is common in nature. Yet, the evolution and maintenance of polyandry remains a bit of an evolutionary puzzle. It was my aim in this thesis to reach a greater understanding of this phenomenon as well as to investigate the consequences of polyandry on the evolution of reproductive divergence in insects. READ MORE