TITLE

New evidence for a postglacial homoploid hybrid origin of the widespread Central European Scabiosa columbaria L. s. str. (Dipsacaceae)

AUTHOR(S)
von Hagen, K. Bernhard; Seidler, Gunnar; Welk, Erik
PUB. DATE
September 2008
SOURCE
Plant Systematics & Evolution;Sep2008, Vol. 274 Issue 3/4, p179
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have tested whether Scabiosa columbaria s. str. could have originated by recent homoploid hybrid speciation because it is of intermediate morphology and is distributed in areas under glacial influence. Existing morphological and new RAPD data for 11 ingroup populations were analysed using multivariate statistics. Most methods indicated that S. columbaria s. str. could be the first example for a homoploid hybrid origin from Central Europe although a rigorous proof was missing partly because of ongoing introgression. Sequence variation was absent for 5,000 bp from 11 regions supporting a postglacial origin of S. columbaria s. str. An analysis of realized macroclimatic niches using GIS data showed that the niches of S. columbaria s. str. were partly intermediate between its putative parental species rather than extreme as often found in other homoploid hybrids. This could be due to geographical preconditions: large new habitats were available in postglacial Europe while in the case of most other homoploid hybrids only ecologically challenging habitats were not occupied by parental taxa.
ACCESSION #
34178511

 

Share

Read the Article

Other Topics