Sökning: "polyploidization"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet polyploidization.

  1. 1. Polyploid Phylogenetics in Plants: Insights on non-model organisms in Fabaceae and Malvaceae

    Författare :Jonna S. Eriksson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diploidization; genome duplication; haplotypes; Hibisceae; Hibiscus; homoeologues; high-throughput sequencing; Pavonia; Malvaceae; polyploidization;

    Sammanfattning : Genome duplication is a common phenomenon in angiosperms and advances in sequencing technologies and bioinformatics is now revealing its prevalence and significance. In a polyploidization event all genes in a genome are doubled. LÄS MER

  3. 2. Plant polyploidy and interactions with insect herbivores

    Författare :Leena Arvanitis; Johan Ehrlén; Christer Wiklund; John N. Thompson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diversicifation; herbivory; host plant preference; plant galls; plant-insect interactions; plant polyploidy; selection; spatial variation; trait-fitness relationship; Terrestrial ecology; Terrestisk ekologi; Plant Ecology; växtekologi;

    Sammanfattning : Polyploidization has been suggested to be a common mechanism for plant speciation. Polyploidy is associated with changes in plant traits and altered habitat preference. LÄS MER

  4. 3. Systematics of Woodsia : Ferns, bioinformatics and more

    Författare :Anders Larsson; Petra Korall; Mats Thulin; Anne Krag Brysting; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ferns; Eupolypods II; Woodsia; phylogeny; biogeography; polyploidy; polyploid speciation; classification; alignment; Biologi med inriktning mot systematik; Biology with specialization in Systematics;

    Sammanfattning : Ferns are one of the three main clades of vascular plants. They have few easily studied morphological characters, reflected in a historically unstable classification. The fern genus Woodsia is known to have a complex evolutionary history including numerous polyploid taxa and hybrids. LÄS MER

  5. 4. Systematics of polyploid Dactylorhiza (Orchidaceae) - genetic diversity, phylogeography and evolution

    Författare :Sofie Olofsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; microsatellites; allozymes; ITS; plastid DNA; Dactylorhiza majalis ssp. traunsteineri; allopolyploidy; AFLPs; immigration history; diploidization; hybridization;

    Sammanfattning : This thesis examines genetic variation in allotetraploids of the Dactylorhiza incarnata/maculata polyploid complex in different parts of Europe. The molecular markers used were AFLPs, allozymes, ITS, nuclear microsatellites and plastid DNA markers. LÄS MER

  7. 5. Cis-regulatory variation and divergence in Capsella

    Författare :Kim A. Steige; Tanja Slotte; Jeff J. Doyle; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER