@ARTICLE{TreeBASE2Ref18589, author = {Rosa Cerros Tlatilpa and J. Travis Columbus and Michael S. Kinney and Paul M. Peterson and Nancy F. Refulio Rodriguez}, title = {Columbus, J. T., P. M. Peterson, N. F. Refulio Rodriguez, R. Cerros Tlatilpa, and M. S. Kinney. 2009. Phylogenetics of Muhlenbergiinae (Poaceae, Chloridoideae, Cynodonteae) based on ITS and trnL-F DNA sequences. In O. Seberg, G. Petersen, A. S. Barfo}, year = {2010}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {}, volume = {}, number = {}, pages = {}, abstract = {Muhlenbergiinae are a subtribe in the grass (Poaceae) subfamily Chloridoideae, tribe Cynodonteae. The morphologically diverse group includes ten genera and 168 species and is restricted almost entirely to the New World, with a center of diversity in Mexico (125 species). With 147 species, Muhlenbergia is by far the largest genus, and is divided into two subgenera, Muhlenbergia and Trichochloa, the latter with two sections. The other, much smaller genera are Aegopogon (4 species), Bealia (1), Blepharoneuron (2), Chaboissaea (4), Lycurus (3), Pereilema (4), Redfieldia (1), Schaffnerella (1), and Schedonnardus (1). We conducted a phylogenetic study of Muhlenbergiinae based on parsimony analysis of DNA sequences of the nuclear ribosomal internal transcribed spacer region (ITS1 + 5.8S + ITS2) and chloroplast trnL intron, trnL 3′ exon, and trnL-trnF intergenic spacer. All genera were sampled, including 52 species of Muhlenbergia representing both subgenera and sections. Muhlenbergia and Pereilema are not monophyletic in the resulting trees. The species of Pereilema and the other small genera are nested within Muhlenbergia in three main lineages. One of the lineages includes a monophyletic Muhlenbergia subgen. Trichochloa. Another lineage comprises species having leaf anatomy predictive of the PCK subtype of C4 photosynthesis. Based on the results of this study, we favor expanding the circumscription of Muhlenbergia to include the other nine genera of the subtribe.} }

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