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Title: Revealing the transcriptomic complexity of switchgrass by PacBio long-read sequencing

Journal Article · · Biotechnology for Biofuels
 [1];  [2];  [3];  [2];  [2];  [4];  [4];  [2];  [2];  [2];  [4];  [5];  [6];  [1]
  1. Jilin Univ., Changchun (China); Univ. of Georgia, Athens, GA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  3. HudsonAlpha Institute for Biotechnology, Huntsville, AL (United States)
  4. Noble Research Institute, LLC, Ardmore, OK (United States)
  5. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States); HudsonAlpha Institute for Biotechnology, Huntsville, AL (United States)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Noble Research Institute, LLC, Ardmore, OK (United States)

Switchgrass (Panicum virgatum L.) is an important bioenergy crop widely used for lignocellulosic research. While extensive transcriptomic analyses have been conducted on this species using short read-based sequencing techniques, very little has been reliably derived regarding alternatively spliced (AS) transcripts. Here, we present an analysis of transcriptomes of six switchgrass tissue types pooled together, sequenced using Pacific Biosciences (PacBio) single-molecular long-read technology. Our analysis identified 105,419 unique transcripts covering 43,570 known genes and 8795 previously unknown genes. 45,168 are novel transcripts of known genes. A total of 60,096 AS transcripts are identified, 45,628 being novel. We have also predicted 1549 transcripts of genes involved in cell wall construction and remodeling, 639 being novel transcripts of known cell wall genes. Most of the predicted transcripts are validated against Illumina-based short reads. Specifically, 96% of the splice junction sites in all the unique transcripts are validated by at least five Illumina reads. Comparisons between genes derived from our identified transcripts and the current genome annotation revealed that among the gene set predicted by both analyses, 16,640 have different exon-intron structures. Overall, substantial amount of new information is derived from the PacBio RNA data regarding both the transcriptome and the genome of switchgrass.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1477307
Journal Information:
Biotechnology for Biofuels, Vol. 11, Issue 1; ISSN 1754-6834
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (2)



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