Sökning: "phylogenetic tree"
Visar resultat 21 - 25 av 103 avhandlingar innehållade orden phylogenetic tree.
21. The use of molecular markers for identifying species diversity and functional variation of ectomycorrhizal fungi
Sammanfattning : Ectomycorrhiza (EM) is a symbiosis between soil living fungi and the roots of woody plants. EM fungal communities are important in forest nutrient cycling, they are species rich and their structures vary between habitats and over time. LÄS MER
22. Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)
Sammanfattning : Although sexual selection for elaborate signals is well documented in numerous species, the extreme diversity in signal design and expression in many taxa is largely unexplained. This thesis explores phylogenetic, mechanistic and ontogenetic explanations for divergence in two classic condition-dependent signal traits in the African widowbirds and bishops (Euplectes spp. LÄS MER
23. Culture-independent methods and high-throughput sequencing applied to evolutionary microbial genomics
Sammanfattning : Culture-independent methods allow us to better understand the diversity of microorganisms on earth. By omitting the culturing step, we can gain access to species previously out of our reach.To better capture and understand the diversity of microorganisms, we have developed an alternative to 16S amplicon sequencing. LÄS MER
24. On the origin of geometrid moths: the phylogenetic relationships and taxonomy
Sammanfattning : 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. LÄS MER
25. Phylogenetic Inference and Allopolyploid Speciation - A Study of Silene section Physolychnis
Sammanfattning : The major theme of this thesis is allopolyploidization, with focus on Silene section Physolychnis. The evolutionary history of an allopolyploid species can be established by inferring the sister relationships of the homoeologous sequences from low copy nuclear markers. LÄS MER