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BaRTv2: A highly resolved barley reference transcriptome for accurate transcript-specific RNA-seq quantification

By Max Coulter, Juan Carlos Entizne, Wenbin Guo, Micha Bayer, Ronja Wonneberger, Linda Milne, Miriam Schreiber, Allison Haaning, Gary Muehlbauer, Nicola McCallum, John Fuller, Craig Simpson, Nils Stein, John WS Brown, Robbie Waugh, Runxuan Zhang

Posted 11 Sep 2021
bioRxiv DOI: 10.1101/2021.09.10.459729

Accurate characterization of splice junctions as well as transcription start and end sites in reference transcriptomes allows precise quantification of transcripts from RNA-seq data and enable detailed investigations of transcriptional and post-transcriptional regulation. Using novel computational methods and a combination of PacBio Iso-seq and Illumina short read sequences from 20 diverse tissues and conditions, we generated a comprehensive and highly resolved barley reference transcript dataset (RTD) from the European 2-row spring barley cultivar Barke (BaRTv2.18). Stringent and thorough filtering was carried out to maintain the quality and accuracy of the splice junctions and transcript start and end sites. BaRTv2.18 shows increased transcript diversity and completeness compared to an earlier version, BaRTv1.0. The accuracy of transcript level quantification, splice junctions and transcript start and end sites has been validated extensively using parallel technologies and analysis, including high resolution RT PCR and 5 prime RACE. BaRTv2.18 contains 39,434 genes and 148,260 transcripts, representing the most comprehensive and resolved reference transcriptome in barley to date. It provides an important and high-quality resource for advanced transcriptomic analyses, including both transcriptional and post-transcriptional regulation, with exceptional resolution and precision.

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