Document Type
Article
Publication Date
9-8-2011
Abstract
Recent phylogenetic works have begun to address long-standing questions regarding the systematics of Campanula (Campanulaceae). Yet, aspects of the evolutionary history, particularly in northwestern North America, remain unresolved. Thus, our primary goal in this study was to infer the phylogenetic positions of northwestern Campanula species within the greater Campanuloideae tree. We combined new sequence data from 5 markers (atpB, rbcL,matK, and trnL-F regions of the chloroplast and the nuclear ITS) representing 12 species ofCampanula with previously published datasets for worldwide campanuloids, allowing us to include approximately 75% of North American Campanuleae in a phylogenetic analysis of the Campanuloideae. Because all but one of North American Campanula species are nested within a single campanuloid subclade (the Rapunculus clade), we conducted a separate set of analyses focused specifically on this group. Our findings show that i) the campanuloids have colonized North America at least 6 times, 4 of which led to radiations, ii) all but one North American campanuloid are nested within the Rapunculus clade, iii) in northwestern North America, a C. piperi – C. lasiocarpa ancestor gave rise to a monophyletic Cordilleran clade that is sister to a clade containing C. rotundifolia, iv) within the Cordilleran clade, C. parryi var. parryiand C. parryi var. idahoensis exhibit a deep, species-level genetic divergence, and v) C. rotundifolia is genetically diverse across its range and polyphyletic. Potential causes of diversification and endemism in northwestern North America are discussed.
Publication Title
Plos One
Volume
6
Issue
9
Recommended Citation
Wendling, Barry M.; Garbreath, Kurt E.; and DeChaine, Eric G., "Resolving the Evolutionary History of Campanula (Campanulaceae) in Western North America" (2011). Biology Faculty and Staff Publications. 11.
https://cedar.wwu.edu/biology_facpubs/11
Subjects - Topical (LCSH)
Campanula--Evolution--North America
Geographic Coverage
North America
Genre/Form
articles
Type
Text
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Language
English
Format
application/pdf
