Methylation, transcription, and rearrangements of transposable elements in synthetic allopolyploids

Khalil Kashkush, Beery Yaakov

Research output: Contribution to journalReview articlepeer-review

39 Scopus citations

Abstract

Transposable elements (TEs) constitute over 90 of the wheat genome. It was suggested that genomic stress such as hybridity or polyploidy might activate transposons. Intensive investigations of various polyploid systems revealed that allopolyploidization event is associated with widespread changes in genome structure, methylation, and expression involving low- and high-copy, coding and noncoding sequences. Massive demethylation and transcriptional activation of TEs were also observed in newly formed allopolyploids. Massive proliferation, however, was reported for very limited number of TE families in various polyploidy systems. The aim of this review is to summarize the accumulated data on genetic and epigenetic dynamics of TEs, particularly in synthetic allotetraploid and allohexaploid wheat species. In addition, the underlying mechanisms and the potential biological significance of TE dynamics following allopolyploidization are discussed.

Original languageEnglish
Article number569826
JournalInternational Journal of Plant Genomics
Volume2011
DOIs
StatePublished - 22 Jun 2011

ASJC Scopus subject areas

  • Genetics
  • Plant Science

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