Search for dissertations about: "phylogenetic networks"

Showing result 1 - 5 of 12 swedish dissertations containing the words phylogenetic networks.

  2. 1. Evolution of host repertoires and the diversification of butterflies

    Author : Mariana Pires Braga; Niklas Janz; Sören Nylin; Fredrik Ronquist; Alexandre Antonelli; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; coevolution; host-parasite interaction; inference; networks; zoologisk ekologi; Animal Ecology;

    Abstract : All herbivorous insects are specialized to some extent to their host plants, but the level of specialization varies greatly. Insect-plant coevolution is often invoked to explain the large diversity of herbivorous insects, but the role of specialization during diversification is still controversial. READ MORE

  4. 2. A forest dark : an evolutionary history of Norway spruce

    Author : Alexis R. Sullivan; Xiao-Ru Wang; Nathaniel Street; María Rosario García-Gil; Bengt Oxelman; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; phylogenetics; genome assembly; recombination; Picea; hybridization; mitogenome; Norway spruce; phylogeography; phylogenetic networks; plastome;

    Abstract : Embedded within the relationships among species is a dense forest of gene trees, each with a potentially unique and discordant history. Such widespread genealogical heterogeneity is expected, but embracing this hierarchy of discordance while reconstructing the histories of populations and species remains a major challenge. READ MORE

  5. 3. Small-scale multilingualism and language contact in egalitarian foragers

    Author : Joanne Yager; Allmän språkvetenskap; []
    Keywords : HUMANIORA; HUMANITIES; small-scale multilingualism; egalitarian language contact; egalitarian bilingualism; bilingual semantic interaction; crosslinguistic influence; lexical convergence; bilingual optimization strategies; Aslian; Austroasiatic; Jedek; Jahai; foragers; undiscovered languages; topological relations; caused motion events; reciprocal events; phylogenetic networks; small-scale multilingualism; egalitarian language contact; egalitarian bilingualism; bilingual semantic interaction; crosslinguistic influence; lexical convergence; bilingual optimization strategies; Aslian; Austroasiatic; Jedek; Jahai; foragers; undiscovered languages; topological relations; caused motion events; reciprocal events; phylogenetic networks;

    Abstract : Situations of multilingualism and language contact in which language varieties are small in scale and relatively equal in social status are important phenomena affecting processes of language change throughout human history. Despite this, our knowledge about the outcomes of multilingualism and language contact in this kind of setting remains limited. READ MORE

  6. 4. Phylogenetic Inference and Allopolyploid Speciation - A Study of Silene section Physolychnis

    Author : Anna Petri; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; allopolyploidization; next-generation sequencing; Physolychnis; sequence specific primers; Silene; species networks; transcriptomics;

    Abstract : 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. READ MORE

  7. 5. Advancing Evolutionary Biology: Genomics, Bayesian Statistics, and Machine Learning

    Author : Tobias Andermann; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; computational biology; bioinformatics; phylogenetics; neural networks; NGS; target capture; Illumina sequencing; fossils; IUCN conservation status; extinction rates;

    Abstract : During the recent decades the field of evolutionary biology has entered the era of big data, which has transformed the field into an increasingly computational discipline. In this thesis I present novel computational method developments, including their application in empirical case studies. READ MORE