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) 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 Similar articles in PubMed 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 (46) Citing Articles via Google Scholar Google Scholar Articles by Clevinger, J. A. Articles by Panero, J. L. Search for Related Content PubMed PubMed Citation Articles by Clevinger, J. A. Articles by Panero, J. L. Agricola Articles by Clevinger, J. A. Articles by Panero, J. L.

Phylogenetic analysis of Silphium and subtribe Engelmanniinae (Asteraceae: Heliantheae) based on ITS and ETS sequence data¹

² Department of Biology, James Madison University, Harrisonburg, Virginia 22807 USA; and ³ Integrative Biology Section, School of Biological Sciences, University of Texas, Austin, Texas 78712 USA

ABSTRACT

The phylogenetic relationships of Silphium and subtribe Engelmanniinae were examined using DNA sequence data. The internal transcribed spacer (ITS) region and the external transcribed spacer (ETS) region were sequenced for 39 specimens representing the six genera of subtribe Engelmanniinae (Berlandiera, Chrysogonum, Dugesia, Engelmannia, Lindheimera, and Silphium), plus five additional genera identified as closely related to the Engelmanniinae by chloroplast DNA restriction site analysis, and three outgroups. Phylogenetic analysis supported the monophyly of Silphium with Lindheimera as sister. Silphium can be divided into two sections based upon two well-supported clades that correspond to root type and growth form. These results also supported the expansion of subtribe Engelmanniinae to include Balsamorhiza, Borrichia, Rojasianthe, Vigethia, and Wyethia. We hypothesize that subtribe Engelmanniinae originated in Mesoamerica and later radiated to the United States. We suggest that the cypsela complex, which is present in Berlandiera, Chrysogonum, Engelmannia, and Lindheimera, arose only once and was subsequently lost in Silphium.

Key Words: Asteraceae • Engelmanniinae • external transcribed spacer • Heliantheae • internal transcribed spacer • molecular phylogeny • Silphium.

This article has been cited by other articles:

				Y. Mitsui, S.-T. Chen, Z.-K. Zhou, C.-I. Peng, Y.-F. Deng, and H. Setoguchi Phylogeny and Biogeography of the Genus Ainsliaea (Asteraceae) in the Sino-Japanese Region based on Nuclear rDNA and Plastid DNA Sequence Data Ann. Bot., January 1, 2008; 101(1): 111 - 124. [Abstract] [Full Text] [PDF]

				Y. Okuyama, N. Fujii, M. Wakabayashi, A. Kawakita, M. Ito, M. Watanabe, N. Murakami, and M. Kato Nonuniform Concerted Evolution and Chloroplast Capture: Heterogeneity of Observed Introgression Patterns in Three Molecular Data Partition Phylogenies of Asian Mitella (Saxifragaceae) Mol. Biol. Evol., February 1, 2005; 22(2): 285 - 296. [Abstract] [Full Text] [PDF]

				R. Acevedo-Rosas, K. Cameron, V. Sosa, and S. Pell A molecular phylogenetic study of Graptopetalum (Crassulaceae) based on ETS, ITS, RPL16, and TRNL-F nucleotide sequences Am. J. Botany, July 1, 2004; 91(7): 1099 - 1104. [Abstract] [Full Text] [PDF]

				G. D. Hoggard, P. J. Kores, M. Molvray, and R. K. Hoggard The phylogeny of Gaura (Onagraceae) based on ITS, ETS, and trnL-F sequence data Am. J. Botany, January 1, 2004; 91(1): 139 - 148. [Abstract] [Full Text] [PDF]

				A. J. Moore and L. Bohs An ITS phylogeny of Balsamorhiza and Wyethia (Asteraceae: Heliantheae) Am. J. Botany, November 1, 2003; 90(11): 1653 - 1660. [Abstract] [Full Text] [PDF]

				L. E. Urbatsch, R. P. Roberts, and V. Karaman Phylogenetic evaluation of Xylothamia, Gundlachia, and related genera (Asteraceae, Astereae) based on ETS and ITS nrDNA sequence data Am. J. Botany, April 1, 2003; 90(4): 634 - 649. [Abstract] [Full Text] [PDF]

				J. F. Tooker, W. A. Koenig, and L. M. Hanks Altered host plant volatiles are proxies for sex pheromones in the gall wasp Antistrophus rufus PNAS, November 26, 2002; 99(24): 15486 - 15491. [Abstract] [Full Text] [PDF]