title: Phylogeographic structure of the chloroplast DNA gene pool in North American Boechera--a genus and continental-wide perspective.
abstract: 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.
authors.affiliation: Heidelberg Institute of Plant Sciences, Department Biodiversity and Plant Systematics, University of Heidelberg, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany.
authors.forename: Christiane
authors.initials: C
authors.lastname: Kiefer
authors.forename: Christoph
authors.initials: C
authors.lastname: Dobes
authors.forename: Timothy F
authors.initials: TF
authors.lastname: Sharbel
authors.forename: Marcus A
authors.initials: MA
authors.lastname: Koch