Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (34)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Andreasen, K.
Right arrow Articles by Baldwin, B. G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Andreasen, K.
Right arrow Articles by Baldwin, B. G.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Molecular Biology and Evolution 18:936-944 (2001)
© 2001 Society for Molecular Biology and Evolution

ARTICLE

Unequal Evolutionary Rates Between Annual and Perennial Lineages of Checker Mallows (Sidalcea, Malvaceae): Evidence from 18S–26S rDNA Internal and External Transcribed Spacers

Katarina Andreasen and Bruce G. Baldwin

Jepson Herbarium and Department of Integrative Biology, University of California at Berkeley
Department of Systematic Botany, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden

Heterogeneous DNA substitution rates were found in the 18S–26S nuclear ribosomal DNA internal transcribed spacer (ITS) and external transcribed spacer (ETS) regions of Sidalcea (Malvaceae), a putatively young genus of annuals and perennials. The majority of comparisons revealed that the annual species had significantly higher molecular evolutionary rates than the perennials, whereas rates were consistently homogenous between obligate annual species. These findings led us to conclude that generation time or possibly another biological factor distinguishing annuals and perennials has influenced rates of molecular evolution in Sidalcea. The congruence of relative-rate test results across both spacer regions reinforced the association between life history and rate of rDNA evolution across lineages of checker mallows. Evolutionary rate variation within perennials mainly involved three basally divergent lineages. The faster rate in one lineage, Sidalcea stipularis, compared with other perennials may be the result of genetic drift in the only known, small, population. The other two basally divergent lineages had slower evolutionary rates compared with the remaining perennials; possible explanations for these differences include rate-reducing effects of a suffrutescent (rather than herbaceous) habit and seed dormancy.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Am. J. Bot.Home page
S. Dunbar-Co, A. M. Wieczorek, and C. W. Morden
Molecular phylogeny and adaptive radiation of the endemic Hawaiian Plantago species (Plantaginaceae)
Am. J. Botany, September 1, 2008; 95(9): 1177 - 1188.
[Abstract] [Full Text] [PDF]

Home page
 Mol Biol EvolHome page
D. F. Soria-Hernanz, J. M. Braverman, and M. B. Hamilton
Parallel Rate Heterogeneity in Chloroplast and Mitochondrial Genomes of Brazil Nut Trees (Lecythidaceae) Is Consistent with Lineage Effects
Mol. Biol. Evol., July 1, 2008; 25(7): 1282 - 1296.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
D. C. Tank and R. G. Olmstead
From annuals to perennials: phylogeny of subtribe Castillejinae (Orobanchaceae)
Am. J. Botany, May 1, 2008; 95(5): 608 - 625.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
D. M. Crayn, M. Rossetto, and D. J. Maynard
Molecular phylogeny and dating reveals an Oligo-Miocene radiation of dry-adapted shrubs (former Tremandraceae) from rainforest tree progenitors (Elaeocarpaceae) in Australia
Am. J. Botany, September 1, 2006; 93(9): 1328 - 1342.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
V. S Ford, J. Lee, B. G Baldwin, and L. D Gottlieb
Species divergence and relationships in Stephanomeria (Compositae): PgiC phylogeny compared to prior biosystematic studies
Am. J. Botany, March 1, 2006; 93(3): 480 - 490.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
J. A. Tate, J. Fuertes Aguilar, S. J. Wagstaff, J. C. La Duke, T. A. Bodo Slotta, and B. B. Simpson
Phylogenetic relationships within the tribe Malveae (Malvaceae, subfamily Malvoideae) as inferred from ITS sequence data
Am. J. Botany, April 1, 2005; 92(4): 584 - 602.
[Abstract] [Full Text] [PDF]

Home page
 Mol Biol EvolHome page
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]

Home page
 Am. J. Bot.Home page
S.-H. Oh and D. Potter
Molecular phylogenetic systematics and biogeography of tribe Neillieae (Rosaceae) using DNA sequences of cpDNA, rDNA, and LEAFY
Am. J. Botany, January 1, 2005; 92(1): 179 - 192.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
K. Andreasen and B. G. Baldwin
Reexamination of relationships, habital evolution, and phylogeography of checker mallows (Sidalcea; Malvaceae) based on molecular phylogenetic data
Am. J. Botany, March 1, 2003; 90(3): 436 - 444.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.