Sökning: "Phylogenetics"

Visar resultat 21 - 25 av 75 avhandlingar innehållade ordet Phylogenetics.

  1. 21. Evolution and Ecology of AhR genes in Atlantic salmon (Salmo salar L.)

    Författare :Maria Hansson; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AhR genes; Atlantic salmon; gene evolution; phylogenetics; environmental pollutants; Baltic Sea; ecotoxicology; Animal ecology; Djurekologi;

    Sammanfattning : In vertebrates, studies of the aryl hydrocarbon receptor (AhR) have been of particular interest due to its direct involvement in the toxic effects exerted by several environmental pollutants, such as PCB and dioxin. After binding to the toxic molecule, this receptor initiates transcription of several genes that are part of the biotransformation battery but most notably the cytochrome P450 (CYP) genes, which results in an excessive release of oxidative enzymes and free radicals. LÄS MER

  3. 22. Environmental sequencing to infer patterns of eukaryotic evolution : Combining long-read and short-read metabarcoding

    Författare :Mahwash Jamy; Fabien Burki; Micah Dunthorn; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Protists; eukaryotes; environmental sequencing; ribosomal DNA; PacBio; long-read metabarcoding; phylogenetics; salt barrier; habitat evolution; eukaryotes evolution; evolutionary rate; Apicomplexa; pathogen; Biology with specialization in Systematics; Biologi med inriktning mot systematik;

    Sammanfattning : Our view of eukaryotes is biased towards plants, animals, and fungi. But the vast majority of eukaryotic diversity is microbial in nature. These microbial eukaryotes are key players in all ecosystems on earth and are collectively known as protists. LÄS MER

  4. 23. Evolution of Vertebrate Vision by Means of Whole Genome Duplications : Zebrafish as a Model for Gene Specialisation

    Författare :David Lagman; Dan Larhammar; Xesús M Abalo; Finn Hallböök; Stephan Neuhauss; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phylogenetics; evolution; vision; visual opsin; transducin; PDE6; genome duplications; subfunctionalisation; Medicinsk vetenskap; Medical Science;

    Sammanfattning : The signalling cascade of rods and cones use different but related protein components. Rods and cones, emerged in the common ancestor of vertebrates around 500 million years ago around when two whole genome duplications took place, named 1R and 2R. LÄS MER

  5. 24. Probabilistic Reconciliation Analysis for Genes and Pseudogenes

    Författare :Owais Mahmudi; Jens Lagergren; Cedric Chauve; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phylogenetics; Evolution; Reconciliation Analysis; Bayesian Inference; Datalogi; Computer Science;

    Sammanfattning : Phylogeneticists have studied the evolution of life from single celled organisms to the astonishing biodiversity around us for a long time now. The relationship between species is often expressed as a binary tree - the tree of life. LÄS MER

  7. 25. Exploration of microbial diversity and evolution through cultivation independent phylogenomics

    Författare :Joran Martijn; Thijs J.G. Ettema; Andrew Roger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cultivation independent genomics; metagenomics; single-cell genomics; metagenomic binning; phylogenetics; phylogenomics; phylogenetic artefacts; comparative genomics; gene tree-species tree reconciliation; rRNA amplicon sequencing; Tara Oceans; origin of mitochondria; Alphaproteobacteria; Rickettsiales; Haloarchaea; endosymbiosis; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

    Sammanfattning : Our understanding of microbial evolution is largely dependent on available genomic data of diverse organisms. Yet, genome-sequencing efforts have mostly ignored the diverse uncultivable majority in favor of cultivable and sociologically relevant organisms. LÄS MER