Gene silencing in plants: relevance for genome evolution and the acquisition of genomic methylation patterns.

Abstract excerpt

Transgenes often become silenced in plants because of repressive influences exerted by flanking plant DNA and/or because of interactions among multiple copies of closely linked transgenes. Repeated transgenes on different chromosomes can also interact in a way that leads to silencing and methylation, suggesting a previously unrecognized ability of unlinked homologous sequences to cross-talk in complex genomes....

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