Genotype-dependent Burst of Transposable Element Expression in Crowns of Hexaploid Wheat (Triticum Aestivum L.) During Cold Acclimation

Overview

Journal Comp Funct Genomics

Date 2012 Apr 5

PMID 22474410

Citations 3

Authors

Debbie Laudencia-Chingcuanco

D Brian Fowler

Affiliations

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Abstract

The expression of 1,613 transposable elements (TEs) represented in the Affymetrix Wheat Genome Chip was examined during cold treatment in crowns of four hexaploid wheat genotypes that vary in tolerance to cold and in flowering time. The TE expression profiles showed a constant level of expression throughout the experiment in three of the genotypes. In winter Norstar, the most cold-hardy of the four genotypes, a subset of the TEs showed a burst of expression after vernalization saturation was achieved. About 47% of the TEs were expressed, and both Class I (retrotransposons) and Class II (DNA transposons) types were well represented. Gypsy and Copia were the most represented among the retrotransposons while CACTA and Mariner were the most represented DNA transposons. The data suggests that the Vrn-A1 region plays a role in the stage-specific induction of TE expression in this genotype.

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