AEM
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
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 Download to citation manager
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Farrelly, V.
Right arrow Articles by Stackebrandt, E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Farrelly, V.
Right arrow Articles by Stackebrandt, E.
Agricola
Right arrow Articles by Farrelly, V.
Right arrow Articles by Stackebrandt, E.

Appl. Environ. Microbiol., Jul 1995, 2798-2801, Vol 61, No. 7
Copyright © 1995, American Society for Microbiology

Effect of genome size and rrn gene copy number on PCR amplification of 16S rRNA genes from a mixture of bacterial species

V Farrelly, FA Rainey and E Stackebrandt
DSM-German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig.

In order to assess the effect of genome size and number of 16S rRNA genes (rDNAs) on the quantities of PCR-generated partial 16S rDNA fragments, equimolar amounts of DNA from pairs of different species for which these parameters are known were subjected to gene amplification. The experimentally determined ratio of PCR products obtained, as determined by image analysis of SYBR-Green I-stained amplification products, corresponded well with the predicted ratio calculated from the number of rrn genes per equimolar amounts of DNA in mixtures of Escherichia coli and "Thermus thermophilus" and of Pseudomonas aeruginosa and "T. thermophilus." The values for the pair of Bacillus subtilis and "T. thermophilus" showed greater deviations from the predicted value. The dependence of the amount of 16S rDNA amplification product on these two parameters makes it impossible to quantify the number of species represented in 16S rDNA clone libraries of environmental samples as long as these two parameters are unknown for the species present.


This article has been cited by other articles:




Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. Microbiol. Mol. Biol. Rev. Eukaryot. Cell All ASM Journals

Copyright © 1995 by the American Society for Microbiology. All rights reserved.