Sökning: "polyploid speciation"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden polyploid speciation.
1. Systematics of Woodsia : Ferns, bioinformatics and more
Sammanfattning : Ferns are one of the three main clades of vascular plants. They have few easily studied morphological characters, reflected in a historically unstable classification. The fern genus Woodsia is known to have a complex evolutionary history including numerous polyploid taxa and hybrids. LÄS MER
2. Systematics and polyploid evolution in Potentilleae (Rosaceae)
Sammanfattning : 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. LÄS MER
3. Polyploid Phylogenetics in Plants: Insights on non-model organisms in Fabaceae and Malvaceae
Sammanfattning : Genome duplication is a common phenomenon in angiosperms and advances in sequencing technologies and bioinformatics is now revealing its prevalence and significance. In a polyploidization event all genes in a genome are doubled. LÄS MER
4. Next-generation Molecular Systematics and Evolution: insights into Medicago
Sammanfattning : Evolutionary relationships among species have in recent years been inferred using DNA sequences from specific genes and represented by tree diagrams (phylogenies). However, the signal contained in different genes can produce conflicting sets of relationships – i.e., gene tree incongruence. LÄS MER
5. Plant polyploidy and interactions with insect herbivores
Sammanfattning : Polyploidization has been suggested to be a common mechanism for plant speciation. Polyploidy is associated with changes in plant traits and altered habitat preference. LÄS MER