Search for dissertations about: "polyploid speciation"

Showing result 1 - 5 of 6 swedish dissertations containing the words polyploid speciation.

  2. 1. Systematics of Woodsia : Ferns, bioinformatics and more

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

    Abstract : 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. READ MORE

  4. 2. Systematics and polyploid evolution in Potentilleae (Rosaceae)

    Author : Magnus Lundberg; Torsten Eriksson; Jürg Schönenberger; Bengt Oxelman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Potentilleae; Fragariinae; Potentilla; Sibbaldia; Fragaria; Alchemilla; systematics; phylogeny; polyploidy; autopolyploidy; allopolyploidy; reticulate evolution; Systematics and phylogenetics; Systematik och fylogeni; växtsystematik; Plant Systematics;

    Abstract : This thesis comprises studies of the phylogenetic relationships in the flowering plant clade Potentilleae in Rosaceae. The relationships were elucidated by using DNA sequence data from the nuclear genome as well as from the plastid genome. In particular, the focus of the studies was the investigation of allopolyploidy, i.e. READ MORE

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

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

    Abstract : 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. READ MORE

  6. 4. Next-generation Molecular Systematics and Evolution: insights into Medicago

    Author : Filipe de Sousa; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; phylogeny; incomplete lineage sorting; paralogy; hybridisation; Medicago;

    Abstract : Evolutionary relationships among species have in recent years been inferred using DNA sequences from specific genes and represented by tree diagrams (phylogenies). However, the signal contained in different genes can produce conflicting sets of relationships – i.e., gene tree incongruence. READ MORE

  7. 5. Plant polyploidy and interactions with insect herbivores

    Author : Leena Arvanitis; Johan Ehrlén; Christer Wiklund; John N. Thompson; Stockholms universitet; []
    Keywords : 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;

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