Sökning: "Multispecies coalescent"
Hittade 4 avhandlingar innehållade orden Multispecies coalescent.
1. Bridging the past to the present: investigating species boundaries with herbarium specimens and next-generation-sequencing. A case study of circumpolar Silene sect. Physolychnis
Sammanfattning : During the recent decades, genetic information enclosed in herbarium collections have been partly revealed, largely due to the fast-moving high-throughput sequencing technologies. However, the genetic outcome from herbarium material is limited by its degradation over time, often worsened by certain preservation methods. LÄS MER
2. Species Delimitation and Phylogenetic Relationships. A study of Silene sections Atocion and Cryptoneurae
Sammanfattning : 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. LÄS MER
3. Phylogenetic Relationships, Biogeography and Species Delimitation: A case study on southern African Silene (Caryophyllaceae)
Sammanfattning : 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. LÄS MER
4. A forest dark : an evolutionary history of Norway spruce
Sammanfattning : 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. LÄS MER
