Abstract
PCR-based methods for rRNA gene analysis have been widely used to study diversity of microbiology. However, the analysis would be difficult when the DNA content in samples is too low to be amplified by conventional PCR. Nested PCR comes up with the advantage of higher sensitivity. It can detect target DNA at several-fold lower concentrations than conventional PCR. However, the amplification bias and factors that potentially affect measurement of sample diversity associated with nested PCR method has received little attention. Here, nested PCR was compared to reconditioning PCR which is based on conventional PCR and it would reduce the formation of heteroduplex. We investigated the use of both nested and reconditioning PCR methods to construct clone libraries of 16S rRNA genes from four swimming pool water samples. Abundances of OTUs (operational taxonomic units) were correlated between the libraries (r 2 = 0.88, P < 0.0005), and some OTUs had equivalent abundances in the two libraries using the Chi-square test. Differences in taxonomic groups, as well as diversity and richness estimators, were compared by paired t-test and the Wilcoxon test, respectively. There were no significant differences between clone libraries using these two PCR methods. The results of ∫-Libshuff analysis suggested that nested PCR have no particular biases in revealing OTU diversity of a bacterial community. Thus, nested PCR produce congruent pictures with reconditioning PCR in the microbial community analysis.
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Fan, ZY., Li, XR., Mao, DP. et al. Could nested PCR be applicable for the study of microbial diversity?. World J Microbiol Biotechnol 25, 1447–1452 (2009). https://doi.org/10.1007/s11274-009-0033-3
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DOI: https://doi.org/10.1007/s11274-009-0033-3