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Plos One : Evaluating Methods for Isolating Total Rna and Predicting the Success of Sequencing Phylogenetically Diverse Plant Transcriptomes, Volume 7

By Quince, Christopher

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Book Id: WPLBN0003937238
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Evaluating Methods for Isolating Total Rna and Predicting the Success of Sequencing Phylogenetically Diverse Plant Transcriptomes, Volume 7  
Author: Quince, Christopher
Volume: Volume 7
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Historic
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Publisher: Plos

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Quince, C. (n.d.). Plos One : Evaluating Methods for Isolating Total Rna and Predicting the Success of Sequencing Phylogenetically Diverse Plant Transcriptomes, Volume 7. Retrieved from http://netlibrary.net/


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Description : Next-generation sequencing plays a central role in the characterization and quantification of transcriptomes. Although numerous metrics are purported to quantify the quality of RNA, there have been no large-scale empirical evaluations of the major determinants of sequencing success. We used a combination of existing and newly developed methods to isolate total RNA from 1115 samples from 695 plant species in 324 families, which represents .900 million years of phylogenetic diversity from green algae through flowering plants, including many plants of economic importance. We then sequenced 629 of these samples on Illumina GAIIx and HiSeq platforms and performed a large comparative analysis to identify predictors of RNA quality and the diversity of putative genes (scaffolds) expressed within samples. Tissue types (e.g., leaf vs. flower) varied in RNA quality, sequencing depth and the number of scaffolds. Tissue age also influenced RNA quality but not the number of scaffolds $1000 bp. Overall, 36% of the variation in the number of scaffolds was explained by metrics of RNA integrity (RIN score), RNA purity (OD 260/230), sequencing platform (GAIIx vs HiSeq) and the amount of total RNA used for sequencing. However, our results show that the most commonly used measures of RNA quality (e.g., RIN) are weak predictors of the number of scaffolds because Illumina sequencing is robust to variation in RNA quality. These results provide novel insight into the methods that are most important in isolating high quality RNA for sequencing and assembling plant transcriptomes. The methods and recommendations provided here could increase the efficiency and decrease the cost of RNA sequencing for individual labs and genome centers.

 

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