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Alliances of Muhlenbergia (Poaceae) within New World Eragrostideae are Identified by Phylogenetic Analysis of Mapped Restriction Sites from Plastid DNAs
Melvin R. Duvall, Paul M. Peterson and Alan H. Christensen
American Journal of Botany
Vol. 81, No. 5 (May, 1994), pp. 622-629
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2445738
Page Count: 8
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Restriction sites for six enzymes were mapped for the plastid DNAs of 25 species of Eragrostideae, one species of Cynodonteae (Eustachys distichophylla), and one species of Pooideae. Of the 124 restriction sites observed, 67 were variably present and shared by two or more species. These data were analyzed by the parsimony method using equal and unequal weights and by bootstrap analysis. The cladistic analyses established that members of the Muhlenbergiinae, including the genera Muhlenbergia, Blepharoneuron, Bealia, Chaboissaea, Lycurus, and Pereilema, share seven restriction site mutations and are strongly supported by the data as a monophyletic subtribe. Surprisingly, Redfieldia flexuosa also clustered with the Muhlenbergiinae in the analysis, perhaps indicative of a past interspecific hybridization event. The restriction sites data also weakly support a relationship (six shared mutations) between Erioneuron, Munroa, and Dasyochloa.
American Journal of Botany © 1994 Botanical Society of America, Inc.