HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Supplemental Data Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (13) Citing Articles via Google Scholar Google Scholar Articles by Hufford, L. Articles by Chase, M. W. Search for Related Content PubMed Articles by Hufford, L. Articles by Chase, M. W. Agricola Articles by Hufford, L. Articles by Chase, M. W.

The major clades of Loasaceae: phylogenetic analysis using the plastid matK and trnL-trnF regions¹

²School of Biological Sciences, Washington State University, Pullman, Washington 99164-4236 USA;and ³Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK

Phylogenetic analyses of Loasaceae that apply DNA sequence data from the plastid trnL-trnF region and matK gene in both maximum-parsimony and maximum-likelihood searches are presented. The results place subfamily Loasoideae as the sister of a subfamily Gronovioideae-Mentzelia clade. Schismocarpus is the sister of the Loasoideae-Gronovioideae-Mentzelia clade. The Schismocarpus-Loasoideae-Gronovioideae-Mentzelia clade is the sister of Eucnide. Several clades in Loasoideae receive strong support, providing insights on generic circumscription problems. Within Mentzelia, several major clades receive strong support, which clarifies relationships among previously circumscribed sections. Prior taxonomic and phylogenetic hypotheses are modeled using topology constraints in parsimony and likelihood analyses; tree lengths and likelihoods, respectively, are compared from constrained and unconstrained analyses to evaluate the relative support for various hypotheses. We use the Shimodaira-Hasegawa (SH) test to establish the significance of the differences between constrained and unconstrained topologies. The SH test rejects topologies based on hypotheses for (1) the placement of gronovioids as the sister of the rest of Loasaceae, (2) the monophyly of subfamily Mentzelioideae as well as Gronovioideae and Loasoideae, (3) the monophyly of Loasa sensu lato as circumscribed by Urban and Gilg, and (4) the monophyly of Mentzelia torreyi and Mentzelia sect. Bartonia.

Key Words: Loasaceae • maximum likelihood • parsimony • phylogeny • Shimodaira-Hasegawa (SH) test • systematics

This article has been cited by other articles:

				M. Ackermann, M. Achatz, and M. Weigend Hybridization and crossability in Caiophora (Loasaceae subfam. Loasoideae): Are interfertile species and inbred populations results of a recent radiation? Am. J. Botany, September 1, 2008; 95(9): 1109 - 1121. [Abstract] [Full Text] [PDF]

				M. ACKERMANN and M. WEIGEND Nectar, Floral Morphology and Pollination Syndrome in Loasaceae subfam. Loasoideae (Cornales) Ann. Bot., September 1, 2006; 98(3): 503 - 514. [Abstract] [Full Text] [PDF]

				J. Shaw, E. B. Lickey, J. T. Beck, S. B. Farmer, W. Liu, J. Miller, K. C. Siripun, C. T. Winder, E. E. Schilling, and R. L. Small The tortoise and the hare II: relative utility of 21 noncoding chloroplast DNA sequences for phylogenetic analysis Am. J. Botany, January 1, 2005; 92(1): 142 - 166. [Abstract] [Full Text] [PDF]