Search for dissertations about: "Rosaceae"
Showing result 1 - 5 of 6 swedish dissertations containing the word Rosaceae.
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1. The evolutionary history of Geum (Rosaceae, Colurieae) : a study of ancient allopolyploid speciation
Abstract : Allopolyploid speciation plays an important role in flowering plant evolution. Its contribution to diversity has been suggested to be significant in Geum. READ MORE
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2. Systematics and polyploid evolution in Potentilleae (Rosaceae)
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
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3. Morphometric and molecular variation in the Nordic dogroses (Rosa Sect. Caninae, Rosaceae)
Abstract : In the present thesis, I investigate the hierarchical structure of morphometric and molecular diversity within and between the Nordic dogroses (Rosa Sect. Caninae, Rosaceae). I also investigate patterns of geographic differentiation and taxonomic relationships within the group. READ MORE
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4. Phylogenetic and phyloclimatic inference of the evolution of Potentilleae (Rosaseae)
Abstract : Polyploidization has occurred many times during the evolution of angiosperms. Allopolyploidization is believed to be the process behind many of these genome duplications, and has resulted in a genetically diverse angiosperm flora. READ MORE
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5. Trophic, Indirect, and Evolutionary Interactions in a Plant–Herbivore–Parasitoid System
Abstract : The aim of this thesis project was to elucidate patterns and processes associated with the biotic interactions in a natural plant–herbivore–parasitoid food web characterized by spatial and temporal heterogeneity with regard to species composition. The system examined is based on island populations of the perennial herb Meadowsweet (Filipendula ulmaria, Rosaceae), located in the Skeppsvik Archipelago. READ MORE