@ARTICLE{TreeBASE2Ref20786, author = {Patrick J. Alexander and Michael D Windham and James Benjamin Beck and Ihsan A. Al-Shehbaz and Loreen Allphin and C Donovan Bailey}, title = {Molecular phylogenetics and taxonomy of the genus Boechera and related genera (Brassicaceae: Boechereae)}, year = {2012}, keywords = {olecular systematics, low-copy nuclear loci, cytonuclear incongruence, Boechera, Borodinia, Yosemitea.}, doi = {}, url = {http://}, pmid = {}, journal = {Systematic Botany}, volume = {}, number = {}, pages = {}, abstract = {Boechera (Brassicaceae) is a diverse genus of ?70 sexual diploid species and numerous apomictic hybrids concentrated in western North America but also found in eastern North America, Greenland, and the Russian Far East. It is the largest genus in tribe Boechereae, which also includes Anelsonia, Borodinia, Cusickiella, Nevada, Phoenicaulis, Polyctenium, and Sandbergia. Boechera is closely related to Arabidopsis and has become a model genus for a diverse array of studies, focusing particularly on apomixis and hybrid speciation. As part of an ongoing effort to clarify the taxonomy of the group, we present phylogenetic analyses of Boechereae, including all genera of the tribe and most of the sexual diploid species of Boechera. Nine independent loci are used, including two plastid regions, nrDNA ITS, and seven low-copy nuclear loci. These phylogenetic analyses address intergeneric relationships within the tribe, monophyly of Boechera, and resolution of major groups within the genus. These analyses indicate that Boechera, as currently circumscribed, is polyphyletic, comprising three main clades. Eastern North American species previously assigned to Boechera form a distinct clade with the Asian taxon Borodinia macrophylla and are herein transferred to the genus Borodinia, resulting in seven new combinations (Borodinia burkii, Borodinia canadensis, Borodinia dentata, Borodinia laevigata, Borodinia missouriensis, Borodinia perstellata, and Borodinia serotina). Boechera repanda, a morphologically aberrant species endemic to the Sierra Nevada, is independent of the other species of Boechera sensu lato and is recognized in the new genus Yosemitea (as Yosemitea repanda). A primarily western North American clade comprising all remaining species is strongly supported and retains the name Boechera. Although resolution within Boechera sensu stricto is limited, a number of well-supported clades are identified.} }

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