Search for dissertations about: "selfish genetic elements"

Showing result 1 - 5 of 6 swedish dissertations containing the words selfish genetic elements.

  2. 1. Drivers of evolutionary change in Podospora anserina

    Author : Sandra Lorena Ament-Velásquez; Hanna Johannesson; Bengt Olle Bengtsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Podospora; Meiotic drive; Spore killing; vegetative incompatibility; heterokaryon incompatibility; allorecognition; speciation; Transposable elements; selfish genetic elements; fungi; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Abstract : Genomic diversity is shaped by a myriad of forces acting in different directions. Some genes work in concert with the interests of the organism, often shaped by natural selection, while others follow their own interests. The latter genes are considered “selfish”, behaving either neutrally to the host, or causing it harm. READ MORE

  4. 2. Catching the Spore killers : Genomic conflict and genome evolution in Neurospora

    Author : Jesper Svedberg; Hanna Johannesson; Mark A. Kirkpatrick; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Genomics; genomic conflict; genome evolution; meiotic drive; spore killer; suppression of recombination; inversions; fungi; Neurospora; Biologi; Biology;

    Abstract : A genome is shaped by many different forces. Recombination can for instance both create and maintain genetic diversity, but the need to locally reduce recombination rates will also leave specific signatures. READ MORE

  5. 3. Genomics of Arbuscular Mycorrhizal Fungi : Expanding knowledge, one assembly at a time

    Author : Merce Montoliu-Nerin; Anna Rosling; Hanna Johannesson; Nicolas Corradi; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; genomics; arbuscular mycorrhizal fungi; phylogenomics; DNA; evolution; Bioinformatics; Bioinformatik; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

    Abstract : Most life forms that inhabit Earth today are still unknown or are difficult to study. Accessing their DNA can give us information of their biology, ecology, and evolution, even when unculturable. The research here presented focused on method development for genomic research of non-model organisms. READ MORE

  6. 4. Genomic and transcriptomic investigation of reproductive incompatibility in Drosophila

    Author : Guilherme Costa Baião; Lisa Klasson; Alistair Darby; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Wolbachia; Drosophila; Drosophila paulistorum; Differential Gene Expression; Reproductive Incompatibility; Reproductive Isolation; Comparative Genomics; Transcriptomics; RNA-Seq; Heteroplasmy; Mitochondria; Genomic conflict; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

    Abstract : Both nuclear and cytoplasmic elements can contribute to the emergence of reproductive incompatibilities that influence evolution and speciation. In the projects that compose this thesis, we use genomics and transcriptomics to study some of those elements in Drosophila. READ MORE

  7. 5. Homing Endonucleases and Horizontal Gene Transfer in Bacteria and Bacteriophages

    Author : David Nord; Britt-Marie Sjöberg; Steinar Johansen; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dsDNA cleavage; ribonucleotide reductase; GIY-YIG motif; Molecular biology; Molekylärbiologi; molekylärbiologi; Molecular Biology;

    Abstract : Homing endonuclease genes (HEGs) are selfish genetic elements that mediate their own super-Mendelian inheritance. This is mediated by the homing endonuclease cleavage of a HEG- allele followed by recombination-repair with a HEG+ allele.The majority of the HEGs are encoded in intervening sequences (IVSs). READ MORE