TY - JOUR
T1 - Methylation, transcription, and rearrangements of transposable elements in synthetic allopolyploids
AU - Kashkush, Khalil
AU - Yaakov, Beery
PY - 2011/6/22
Y1 - 2011/6/22
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79959256918&partnerID=8YFLogxK
U2 - https://doi.org/10.1155/2011/569826
DO - https://doi.org/10.1155/2011/569826
M3 - Review article
C2 - 21760771
SN - 1687-5370
VL - 2011
JO - International Journal of Plant Genomics
JF - International Journal of Plant Genomics
M1 - 569826
ER -