Transposable elements (TEs) are ubiquitous residents in eukaryotic genomes. They can cause dramatic changes in gene expression and lead to gross rearrangements of chromosome structure, providing the basis for rapid evolution. The species group of contains certain species that can be crossed under experimental conditions and their phylogeny is thoroughly investigated. We have shown that the most primitive karyotypically and probably the ancestral species of the group, is in the process of colonization by a very unusual retroelement which apparently repeatedly invaded the species of the group in the past. However, the molecular mechanisms and evolutionary consequences of such invasions are poorly understood. In this commentary, we discuss the implications of our recent investigation into the response of the RNA silencing system to invasion of a new host genome which can be achieved in different ways.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3681739PMC
http://dx.doi.org/10.4161/mge.24542DOI Listing

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