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Population Genomics of Transposable Element Activation in the Highly Repressive Genome of an Agricultural Pathogen by Danilo Pereira; Ursula Oggenfuss; Bruce A. McDonald; Daniel Croll is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Population Genomics of Transposable Element Activation in the Highly Repressive Genome of an Agricultural Pathogen about?

The activity of transposable elements (TEs) can be an important driver of genetic diversity with TE-mediated mutations having a wide range of fitness consequences. To avoid deleterious effects of TE activity, some fungi have evolved highly sophisticated genomic defences to reduce TE proliferation across the genome. Repeat-induced point mutation (RIP) is a fungal-specific TE defence mechanism efficiently targeting duplicated sequences. The rapid accumulation of RIPs is expected to deactivate TEs over the course of a few generations. The evolutionary dynamics of TEs at the population level in a species with highly repressive genome defences is poorly understood. Here, we analyse 366 whole-genome sequences of __Parastagonospora nodorum__, a fungal pathogen of wheat with efficient RIP. A global population genomics analysis revealed high levels of genetic diversity and signs of frequent sexual recombination. Contrary to expectations for a species with RIP, we identified recent TE activity in multiple populations. The TE composition and copy numbers showed little divergence among global populations regardless of the demographic history. Miniature inverted-repeat transposable elements (MI

Who reads Population Genomics of Transposable Element Activation in the Highly Repressive Genome of an Agricultural Pathogen?

Author

Danilo Pereira; Ursula Oggenfuss; Bruce A. McDonald; Daniel Croll

Publisher

Microbiology Society

Published

2021

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)