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Phylogenetic relationships and biogeography of Ranunculus and allied genera (Ranunculaceae) in the Mediterranean region and in the European Alpine System
The results from this study suggest that the split of allied genera from Ranunculus s.l.s. occurred during the Eocene and Oligocene, and a hypothesis of an origin of alpine buttercups from lowland ancestors of the same geographical region is supported.
Phylogenetic relationships and evolutionary traits in Ranunculus s.l. (Ranunculaceae) inferred from ITS sequence analysis.
Genetic diversity and population structure in natural populations of Moroccan Atlas cedar (Cedrus atlantica; Pinaceae) determined with cpSSR markers.
- A. Terrab, O. Paun, S. Talavera, K. Tremetsberger, M. Arista, T. Stuessy
- Environmental ScienceAmerican journal of botany
- 1 September 2006
AMOVA analysis showed that most of the variation in C. atlantica occurs within populations and confirmed the general tendency of gymnosperms to display lower values of population differentiation than angiosperms and the distance-based clustering method (PCoA and neighbor-joining analysis) and the geographical structure revealed a poor structure among the six populations.
Phylogenetic relationships within Orchidaceae based on a low-copy nuclear coding gene, Xdh: Congruence with organellar and nuclear ribosomal DNA results.
Genetic diversity in widespread species is not congruent with species richness in alpine plant communities.
This work tests whether the genetic and species levels of biodiversity co-vary, using a large-scale and multi-species approach and demonstrates that species richness and genetic diversity are not correlated.
Patterns, sources and ecological implications of clonal diversity in apomictic Ranunculus carpaticola (Ranunculus auricomus complex, Ranunculaceae)
- O. Paun, J. Greilhuber, E. Temsch, E. Hörandl
- Biology, Environmental ScienceMolecular ecology
- 1 April 2006
It is hypothesize that maintenance of genetic diversity and superior colonizing abilities of apomicts in temporally and spatially heterogeneous environments are important for their distributional success.
Genetic diversity at chloroplast microsatellites (cpSSRs) and geographic structure in endangered West Mediterranean firs (Abies spp., Pinaceae)
- A. Terrab, S. Talavera, M. Arista, O. Paun, T. Stuessy, K. Tremetsberger
- Environmental Science
- 1 May 2007
The analysis indicates that the population formerly assigned to the species A. tazaotana is, in fact, genetically very close to most A marocana stands, and implications of the observed population structures for conservation and management of West Mediterranean Abies taxa are discussed.
Hybrid speciation in angiosperms: parental divergence drives ploidy.
The classical cytological hypothesis that ploidy in hybrid speciation is governed by the extent of chromosomal rearrangements among parental species is evaluated and it is argued that this asymmetric relationship may be reinforced immediately after hybrid formation, during stabilization and establishment.
Out of the Alps: colonization of Northern Europe by East Alpine populations of the Glacier Buttercup Ranunculus glacialis L. (Ranunculaceae)
- P. Schönswetter, O. Paun, A. Tribsch, H. Niklfeld
- Environmental ScienceMolecular ecology
- 1 December 2003
The authors' data suggest that the Pyrenees were colonized more recently than the Tatra from the Alps, and it is very likely that R. glacialis colonized Northern Europe in postglacial times from source populations in the Eastern Alps.
Stable Epigenetic Effects Impact Adaptation in Allopolyploid Orchids (Dactylorhiza: Orchidaceae)
- O. Paun, R. Bateman, M. Fay, M. Hedrén, L. Civeyrel, M. Chase
- BiologyMolecular biology and evolution
- 15 June 2010
A need to expand the current evolutionary framework to encompass a complementary epigenetic dimension when seeking to understand population processes that drive phenotypic evolution and adaptation is suggested.