Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Triticum urartu strain:PI 428198 Genome sequencing and Transcriptome or Gene expression

ABSTRACT: For this project, we have sequenced, assembled and annotated a transcriptome of a diploid wheat Triticum urartu accession PI 428198. The sequencing libraries were prepared from shoot and root tissues harvested from 2-3 week old seedlings. All sequencing was carried out on the Illumina HiSeq platform using the 100 bp pair-end protocol (248.5 million reads). The assembly was constructed using a multiple k-mer approach with a de novo assembly algorithm implemented in CLC Genomics Workbench 5.5 and additional redundancy reduction with CD-HIT and blast2cap3 programs. Open reading frames and proteins were predicted using BLASTX searches and a findorf algorithm.

INSTRUMENT(S): Illumina HiSeq 2000

ORGANISM(S): Triticum urartu

SUBMITTER: Jorge Dubcovsky

PROVIDER: E-MTAB-5037 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Separating homeologs by phasing in the tetraploid wheat transcriptome.

Krasileva Ksenia V KV Buffalo Vince V Bailey Paul P Pearce Stephen S Ayling Sarah S Tabbita Facundo F Soria Marcelo M Wang Shichen S Akhunov Eduard E Uauy Cristobal C Dubcovsky Jorge J

Genome biology 20130625 6

<h4>Background</h4>The high level of identity among duplicated homoeologous genomes in tetraploid pasta wheat presents substantial challenges for de novo transcriptome assembly. To solve this problem, we develop a specialized bioinformatics workflow that optimizes transcriptome assembly and separation of merged homoeologs. To evaluate our strategy, we sequence and assemble the transcriptome of one of the diploid ancestors of pasta wheat, and compare both assemblies with a benchmark set of 13,472 ...[more]

PMID: 23800085

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Project description:Phosphorus (P) is an essential macronutrient for plant growth and development, and a plant must balance P uptake, mobilisation, and partitioning to various organs to modulate P homeostasis. The underlying molecular mechanisms of wheat under phosphate (Pi) starvation conditions remain elusive despite wheat is an important cultivated food crop worldwide. We generated transcriptome profiles of wheat variety Chinese Spring (CS) in response to Pi starvation (-P) for 10 days using RNA-Seq methods.We used 73.8 million high-quality reads obtained from libraries for de novo assembly. Overall, a set containing 29,617 non-redundant wheat transcripts was constructed with 15,047 assemblies and 14,570 non-redundant, full-length cDNAs in TriFLDB. Of the transcripts, 10,656 of the 15,047 assemblies were unaligned against barley full-length cDNAs, suggesting that many of them might be distinct of barley transcripts. The distribution of average expression levels for the assembly was lower than that for cDNAs, suggesting that the assemblies contained rare transcripts limited availability using full-length cDNA library construction methods. Within the transcript set, we identified 892-2,833 up- or downregulated transcripts in root and shoot, including 18.9-40.5% assemblies, uncovered by cDNAs in TriFLDB under -P in each condition. In the results, the expression level of wheat IPS1 (induced by phosphate starvation 1) homolog, TaIPS1, was 358.6-fold higher in the root and 12.6-fold higher in the shoot, which was confirmed by qRT-PCR analysis. Comparative analysis between wheat (a rice orthologue) and rice responsive transcripts under -P conditions showed that 39 (root) and 21 (shoot) responsive transcripts were commonly upregulated, and most of them seemed to be involved in a general response to -P; IPS1-mediated signal transduction and its downstream function such as Pi remobilization, Pi uptake and change metabolism.Our transcriptome profiling demonstrates the impact of -P in wheat. This study shows that enhancing the Pi-mediated signalling pathway through IPS1 is conserved as a potent adaptation to Pi starvation in both wheat and rice, and also that our constructed strategy using short read next generation sequencing (NGS) data was successful for the transcriptome analysis in wheat without reference genome. Note: Samples in SRA were assigned the same sample accession. This is incorrect as there are different samples, hence “Source Name” was replaced with new values. Comment[ENA_SAMPLE] contains the original SRA sample accessions.

Dataset Information

Triticum urartu strain:PI 428198 Genome sequencing and Transcriptome or Gene expression

Publications

Separating homeologs by phasing in the tetraploid wheat transcriptome.

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