Journal article

Analysis of Repeat Induced Point (RIP) Mutations in Leptosphaeria maculans Indicates Variability in the RIP Process Between Fungal Species

Angela P Van de Wouw, Candace E Elliott, Kerryn M Popa, Alexander Idnurm



Gene duplication contributes to evolutionary potential, yet many duplications in a genome arise from the activity of "selfish" genetic elements such as transposable elements. Fungi have a number of mechanisms by which they limit the expansion of transposons, including Repeat Induced Point mutation (RIP). RIP has been best characterized in the Sordariomycete Neurospora crassa, wherein duplicated DNA regions are recognized after cell fusion, but before nuclear fusion during the sexual cycle, and then mutated. While "signatures" of RIP appear in the genome sequences of many fungi, the species most distant from N. crassa in which the process has been experimentally demonstrated to occur is the D..

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Funding Acknowledgements

We thank Barbara Howlett for her encouragement and comments on the manuscript, as well as two anonymous reviewers and the handling editor, Michael Freitag, for their insightful suggestions. This research was supported by the Australian Grains Research and Development Corporation and the Australian Research Council.