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Transcriptome-scale homoeolog-specific transcript assemblies of bread wheat.

Andreas W Schreiber1, Matthew J Hayden, Kerrie L Forrest

  • 1Australian Centre for Plant Functional Genomics, Univ. of Adelaide, PMB 1 Glen Osmond, SA 5064, Australia. andreas.schreiber@adelaide.edu.au

BMC Genomics
|September 20, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel method for assembling the bread wheat transcriptome, achieving high accuracy in separating homoeologous gene copies. This provides a valuable reference for future wheat genomic research.

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Area of Science:

  • Plant Genomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Bread wheat is a globally significant food crop with a complex hexaploid genome.
  • Existing efforts to sequence the wheat genome face challenges due to its polyploidy.
  • An alternative approach focusing on homoeolog-specific transcriptome assembly is presented.

Purpose of the Study:

  • To develop a homoeolog-specific assembly of the bread wheat transcriptome.
  • To provide a high-quality reference transcriptome for wheat research.
  • To establish a transferable assembly methodology for other polyploid species.

Main Methods:

  • Utilized a two-stage assembly process for transcriptome data from Roche-454 and Illumina GAIIx reads.
  • Employed rapid partitioning of expressed sequences into homoeologous clusters.
  • Performed parallel high-fidelity assembly on a compute cloud.

Main Results:

  • Achieved a high-quality, homoeolog-specific assembly of the hexaploid wheat transcriptome.
  • Demonstrated high accuracy (approx. 98.5%) in separating homoeologous gene triplets into distinct contigs.
  • Estimated transcriptome coverage of approximately 75-80%.

Conclusions:

  • This study presents the first homoeolog-specific assembly of the wheat transcriptome.
  • The generated reference transcriptome will support future wheat research.
  • The assembly methodology is adaptable for other polyploid organisms.