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• W3036074175 abstract "Abstract Barbara McClintock first hypothesized that interspecific hybridization could provide a “genomic shock” that leads to the mobilization of transposable elements. This hypothesis is based on the idea that regulation of transposable element movement is potentially disrupted in hybrids. However, the handful of studies testing this hypothesis have yielded mixed results. Here, we set out to identify if hybridization can increase transposition rate and facilitate colonization of transposable elements in Saccharomyces cerevisiae x Saccharomyces uvarum interspecific yeast hybrids. S. cerevisiae have a small number of active long terminal repeat (LTR) retrotransposons (Ty elements), while their distant relative S. uvarum have lost the Ty elements active in S. cerevisiae . While the regulation system of Ty elements is known in S. cerevisiae , it is unclear how Ty elements are regulated in other Saccharomyces species, and what mechanisms contributed to the loss of most classes of Ty elements in S. uvarum . Therefore, we first assessed whether transposable elements could insert in the S. uvarum sub-genome of a S. cerevisiae x S. uvarum hybrid. We induced transposition to occur in these hybrids and developed a sequencing technique to show that Ty elements insert readily and non-randomly in the S. uvarum genome. We then used an in vivo reporter construct to directly measure transposition rate in hybrids, demonstrating that hybridization itself does not alter rate of mobilization. However, we surprisingly show that species-specific mitochondrial inheritance can change transposition rate by an order of magnitude. Overall, our results provide evidence that hybridization can facilitate the introduction of transposable elements across species boundaries and alter transposition via mitochondrial transmission, but that this does not lead to unrestrained proliferation of transposable elements suggested by the genomic shock theory." @default.
• W3036074175 created "2020-06-25" @default.
• W3036074175 creator A5015723475 @default.
• W3036074175 creator A5038039561 @default.
• W3036074175 creator A5061651189 @default.
• W3036074175 creator A5077508781 @default.
• W3036074175 creator A5091690837 @default.
• W3036074175 date "2020-06-17" @default.
• W3036074175 modified "2023-10-05" @default.
• W3036074175 title "Transposable element mobilization in interspecific yeast hybrids" @default.
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