Isoform Sequencing Provides Insight Into Freezing Response of Common Wheat (Triticum aestivum L.)

Frontiers in Genetics

Ke Wang¹  Jiancheng Zhang¹  Na Yang¹  Jian Wang¹  Xingwei Zheng¹  Jilong Xi¹  Tianyuan Xi¹  Mengmeng Shi²  Caixia Wu²  Jun Zheng² 

[1] Institute of Cotton Research, Shanxi Agricultural University, Yuncheng, China;Institute of Wheat Research, Shanxi Agricultural University, Linfen, China;

关键词: wheat (Triticum aestivum L.);    freezing;    transcriptome;    full-length transcript;    alternative splicing;   

DOI  :  10.3389/fgene.2020.00462

来源: DOAJ

【 摘 要 】

The objective of the study is to reveal the freezing tolerance mechanisms of wheat by combining the emerging single-molecule real-time (SMRT) sequencing technology PacBio Sequel and Illumina sequencing. Commercial semiwinter wheat Zhoumai 18 was exposed to −6°C for 4 h at the four-leave stage. Leaves of the control group and freezing-treated group were used to perform cDNA library construction. PacBio SMRT sequencing yielded 51,570 high-quality isoforms from leaves of control sample of Zhoumai 18, encoded by 20,366 gene loci. In total, 73,695 transcript isoforms, corresponding to 23,039 genes, were identified from the freezing-treated leaves. Compared with transcripts from the International Wheat Genome Sequencing Consortium RefSeq v1.1, 57,667 novel isoforms were discovered, which were annotated 21,672 known gene loci, as well as 3,399 novel gene loci. Transcriptome characterization including alterative spliced events, alternative polydenylation sites, transcription factors, and fusion transcripts were also analyzed. Freezing-responsive genes and signals were uncovered and proved that the ICE-ERF-COR pathway and ABA signal transduction play a vital role in the freezing response of wheat. In this study, PacBio sequencing and Illumina sequencing were applied to investigate the freezing tolerance in common wheat, and the transcriptome results provide insights into the molecular regulation mechanisms under freezing treatment.

【 授权许可】

Unknown