Skip Navigation



Journal of Heredity Advance Access published online on May 19, 2006
Journal of Heredity, doi:10.1093/jhered/esj035
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
97/3/218    most recent
esj035v1
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 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 arrowRequest Permissions
Google Scholar
Right arrow Articles by Krieger, J.
Right arrow Articles by Ludwig, A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Krieger, J.
Right arrow Articles by Ludwig, A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The American Genetic Association. 2006. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.
Received August 25, 2005
Accepted November 5, 2005

Article

Unusual Intraindividual Variation of the Nuclear 18S rRNA Gene is Widespread Within the Acipenseridae

Jeannette Krieger 1 *, Anne Kathrin Hett 2, Paul A. Fuerst 3, Vadim J. Birstein 4, and Arne Ludwig 2

1 From the Department of Ecology and Evolutionary Biology, Brown University, 80 Waterman Street, Providence, RI 02912
2 From the Department of Evolutionary Genetics, Institute for Zoo and Wildlife Research, PF 601103, 10252 Berlin, Germany
3 From the Departments of Evolution, Ecology and Organismal Biology and Molecular Genetics, Ohio State University, Columbus, OH 43210
4 Sturgeon Conservation International, 331 West 57th Street, #159, New York, NY 10019

* To whom correspondence should be addressed.
Jeannette Krieger, E-mail: jkrieg{at}frontiernet.net


  Abstract

Significant intraindividual variation in the sequence of the 18S rRNA gene is unusual in animal genomes. In a previous study, multiple 18S rRNA gene sequences were observed within individuals of eight species of sturgeon from North America but not in the North American paddlefish, Polyodon spathula, in two species of Polypterus (Polypterus delhezi and Polypterus senegalus), in other primitive fishes (Erpetoichthys calabaricus, Lepisosteus osseus, Amia calva) or in a lungfish (Protopterus sp.). These observations led to the hypothesis that this unusual genetic characteristic arose within the Acipenseriformes after the presumed divergence of the sturgeon and paddlefish families. In the present study, a survey of nearly all Eurasian acipenseriform species was conducted to examine 18S rDNA variation. Intraindividual variation was not found in the polyodontid species, the Chinese paddlefish, Psephurus gladius, but variation was detected in all Eurasian acipenserid species. The comparison of sequences from two major segments of the 18S rRNA gene and identification of sites where insertion/deletion events have occurred are placed in the context of evolutionary relationships within the Acipenseriformes and the evolution of rDNA variation in this group.


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
 MicrobiologyHome page
R. Ueno, V. A. R. Huss, N. Urano, and S. Watabe
Direct evidence for redundant segmental replacement between multiple 18S rRNA genes in a single Prototheca strain
Microbiology, November 1, 2007; 153(11): 3879 - 3893.
[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.