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Mol Phylogenet Evol. 2009 Aug;52(2):303-11. doi: 10.1016/j.ympev.2009.03.016. Epub 2009 Mar 26.

Phylogeographic structure of the chloroplast DNA gene pool in North American Boechera--a genus and continental-wide perspective.

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Heidelberg Institute of Plant Sciences, Department Biodiversity and Plant Systematics, University of Heidelberg, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany.


Continental-wide phylogeographic studies of plants in North America are rare. In our study we examined the phylogeographic history of Boechera (Brassicaceae) on a continental-wide scale testing if it is possible to do an analysis for 57 of the currently accepted taxa simultaneously. A large amount of haplotype sharing is explained both by recurrent hybridization and by non-differentiation of haplotypes since speciation. Hence, the chloroplast gene pool in Boechera predates speciation and therefore justifies the simultaneous analysis of a large number of taxa. Unrelated from taxon identity we can show that the evolutionary lineages detected have a different phylogeographic history in terms of glacial refugia and recently recolonised areas.

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