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Microbial community composition and diversity via 16S rRNA gene amplicons: evaluating the Illumina platform

Lucas Sinclair, Omneya Ahmed Osman, Stefan Bertilsson, Alexander Eiler
doi: https://doi.org/10.1101/010058
Lucas Sinclair
1Department of Ecology and Genetics, Limnology, and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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Omneya Ahmed Osman
1Department of Ecology and Genetics, Limnology, and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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Stefan Bertilsson
1Department of Ecology and Genetics, Limnology, and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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Alexander Eiler
1Department of Ecology and Genetics, Limnology, and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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  • For correspondence: alexander.eiler@ebc.uu.se
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Abstract

As new sequencing technologies become cheaper and older ones disappear, laboratories switch vendors and platforms. Validating the new setups is a crucial part of conducting rigorous scientific research. Here we report on the reliability and biases of performing bacterial 16S rRNA gene amplicon paired-end sequencing on the MiSeq Illumina platform. We designed a protocol using 50 barcode pairs to run samples in parallel and coded a pipeline to process the data. Sequencing the same sediment sample in 248 replicates as well as 70 samples from alkaline soda lakes, we evaluated the performance of the method with regards to estimates of alpha and beta diversity.

Using different purification and DNA quantification procedures we always found up to 5-fold differences in the yield of sequences between individually barcodes samples. Using either a one-step or a two-step PCR preparation resulted in significantly different estimates in both alpha and beta diversity. Comparing with a previous method based on 454 pyrosequencing, we found that our Illumina protocol performed in a similar manner – with the exception for evenness estimates where correspondence between the methods was low.

We further quantified the data loss at every processing step eventually accumulating to 50% of the raw reads. When evaluating different OTU clustering methods, we observed a stark contrast between the results of QIIME with default settings and the more recent UPARSE algorithm when it comes to the number of OTUs generated. Still, overall trends in alpha and beta diversity corresponded highly using both clustering methods.

Our procedure performed well considering the precisions of alpha and beta diversity estimates, with insignificant effects of individual barcodes. Comparative analyses suggest that 454 and Illumina sequence data can be combined if the same PCR protocol and bioinformatic workflows are used for describing patterns in richness, beta-diversity and taxonomic composition.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted October 06, 2014.
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Microbial community composition and diversity via 16S rRNA gene amplicons: evaluating the Illumina platform
Lucas Sinclair, Omneya Ahmed Osman, Stefan Bertilsson, Alexander Eiler
bioRxiv 010058; doi: https://doi.org/10.1101/010058
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Microbial community composition and diversity via 16S rRNA gene amplicons: evaluating the Illumina platform
Lucas Sinclair, Omneya Ahmed Osman, Stefan Bertilsson, Alexander Eiler
bioRxiv 010058; doi: https://doi.org/10.1101/010058

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