Skip Navigation

Annals of Botany 2005 95(1):191-199; doi:10.1093/aob/mci012
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 (10)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by CHASE, M. W.
Right arrow Articles by WILLIAMS, N. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by CHASE, M. W.
Right arrow Articles by WILLIAMS, N. H.
Agricola
Right arrow Articles by CHASE, M. W.
Right arrow Articles by WILLIAMS, N. H.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?


Annals of Botany 95/1 © Annals of Botany Company 2005; all rights reserved

Life History Evolution and Genome Size in Subtribe Oncidiinae (Orchidaceae)

MARK W. CHASE1,*, LYNDA HANSON1, VICTOR A. ALBERT2, W. MARK WHITTEN3 and NORRIS H. WILLIAMS3

1 Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK, 2 The Natural History Museums and Botanical Garden, University of Oslo, P.O. Box 1172, Blindern, NO-0318 Oslo, Norway and 3 Florida Museum of Natural History, University of Florida, Gainesville, FL 32611-7800, USA

* For correspondence. E-mail m.chase{at}kew.org

Received: 3 January 2004    Returned for revision: 19 February 2004    Accepted: 7 May 2004   

• Background and Aims Within Oncidiinae, there are several groups of species that are effectively annuals, and we wished to see if these species had smaller genome sizes than average for the subtribe.

• Methods Fifty-four genome size estimates (50 of which are new) for species in subtribe Oncidiinae (Orchidaceae) were examined for the first time in a phylogenetic context to evaluate hypotheses concerning genome sizes and life history traits.

• Results and Conclusions Within the limits of still relatively sparse sampling, the species that are effectively annuals do appear to have smaller genome sizes than average. However, the genome sizes of their immediate sister group are also small, indicating that changes in genome size preceded the change in life history traits. Genome sizes and chromosome numbers also do not correlate; some slowly growing species have lower chromosome numbers but large genomes and vice versa. Based on a survey of the literature on orchids, it is also clear that epiphytic species have smaller genome sizes than do terrestrial species, which could be an effect of different water relations or the fact that most terrestrial orchids are geophytic or have distinct growth and dormancy phases.

Key words: Genome size, orchids, phylogenetics, Oncidiinae, twig epiphytes, character optimization, chromosome number


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
 ANN BOT (LOND)Home page
I. J. Leitch, I. Kahandawala, J. Suda, L. Hanson, M. J. Ingrouille, M. W. Chase, and M. F. Fay
Genome size diversity in orchids: consequences and evolution
Ann. Bot., January 24, 2009; (2009) mcp003v1.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
W. M. Whitten, M. A. Blanco, N. H. Williams, S. Koehler, G. Carnevali, R. B. Singer, L. Endara, and K. M. Neubig
Molecular phylogenetics of Maxillaria and related genera (Orchidaceae: Cymbidieae) based on combined molecular data sets
Am. J. Botany, November 1, 2007; 94(11): 1860 - 1889.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
P. Smarda, P. Bures, and L. Horova
Random Distribution Pattern and Non-adaptivity of Genome Size in a Highly Variable Population of Festuca pallens
Ann. Bot., July 1, 2007; 100(1): 141 - 150.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
H. Weiss-Schneeweiss, J. Greilhuber, and G. M. Schneeweiss
Genome size evolution in holoparasitic Orobanche (Orobanchaceae) and related genera
Am. J. Botany, December 1, 2005; 93(1): 148 - 156.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
M. D. BENNETT and I. J. LEITCH
Plant Genome Size Research: A Field In Focus
Ann. Bot., January 1, 2005; 95(1): 1 - 6.
[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.