Search for dissertations about: "PHYLOGENETIC-RELATIONSHIPS"
Showing result 1 - 5 of 56 swedish dissertations containing the word PHYLOGENETIC-RELATIONSHIPS.
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1. Phylogenetic relationships and species richness of coprophilous ascomycetes
Abstract : Coprophilous ascomycetes are a diverse group of saprobes, of which many belong to three families, Delitschiaceae, Phaeotrichaceae and Sporormiaceae, within the large order Pleosporales. The natural relationships and circumscription of these families are unclear, especially within the family Sporormiaceae, where the generic delimitation have been questioned. READ MORE
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2. On the origin of geometrid moths: the phylogenetic relationships and taxonomy
Abstract : Geometrid moths represent one of the largest radiations of Lepidoptera. Phylogenetic analyses based on morphological and molecular data supports the monophyly of this group of moths. However, the subfamilial and tribal compositions of major groups are still unresolved, leading to unstable classifications. READ MORE
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3. Species Delimitation and Phylogenetic Relationships. A study of Silene sections Atocion and Cryptoneurae
Abstract : Abstract The existence of conflicting genealogies of different genes through the evolution of species complicates the inference of phylogenetic relationships. The Multispecies Coalescent (MSC) model provides a theoretical background that account for the stochasticity in the genealogical process, thus providing systematists with a potentially objective way of testing alternative hypotheses of putative species. READ MORE
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4. Phylogenetic Relationships, Biogeography and Species Delimitation: A case study on southern African Silene (Caryophyllaceae)
Abstract : The primary aim of this thesis was to explore the phylogenetic relationships and historical biogeography of African members of the plant genus Silene (Caryophyllaceae), with special focus on the eight native southern African taxa. Three loci (the nuclear ribosomal internal transcribed spacer region, and the rps16 and matK regions from the plastid genome) generated using traditional Sanger sequencing were used to infer the phylogenetic positions of African taxa, while sequence data from 28 low copy nuclear loci were generated using the target capture method to explore shallow phylogenetic relationships within southern African taxa. READ MORE
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5. Phylogenetic Relationships of Silene sect. Melandrium and Allied Taxa (Caryophyllaceae), as Deduced from Multiple Gene Trees
Abstract : This thesis focuses on phylogenetic relationships among some of the major lineages in Silene subgenus Behenantha (Caryophyllaceae) using DNA sequences from multiple, potentially unlinked gene regions from a large taxonomic and geographic sample. Both traditional phylogenetic analyses and a strategy to infer species trees and gene trees in a joint approach are used. READ MORE