Université de Fribourg

Is hybridization driving the evolution of climatic niche in Alyssum montanum

Arrigo, Nils ; La Harpe, Marylaure de ; Litsios, Glenn ; Zozomová-Lihová, Judita ; Španiel, Stanislav ; Marhold, Karol ; Barker, Michael S. ; Alvarez, Nadir

In: American Journal of Botany, 2016, p. -

PREMISE OF THE STUDY: After decades of interest, the contribution of hybridization to ecological diversification remains unclear. Hybridization is a potent source of novelty, but nascent hybrid lineages must overcome reproductive and ecological competition from their parental species. Here, we assess whether hybrid speciation is advantageous over alternative modes of speciation, by comparing...

Université de Fribourg

Biosystematic study of the diploid-polyploid Pilosella alpicola group with variation in breeding system: Patterns and processes

Šingliarová, Barbora ; Hodálová, Iva ; Mráz, Patrik

In: Taxon, 2011, vol. 60, no. 2, p. 450-470

Members of the Pilosella alpicola species group (Asteraceae) are distributed throughout the alpine region of the European mountains (Alps, Carpathians, Balkan mountains). Like other Pilosella species groups (Hieracium subg. Pilosella ), the taxonomy and species' relationships are poorly understood mostly due to widespread facultative apomixis, frequent hybridization and polyploidization—the...