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2023 年度 実績報告書

The role of non-allelic gene conversion in the evolution of Transposable Elements

研究課題

研究課題/領域番号 20K06761
研究機関国立研究開発法人理化学研究所

研究代表者

FAWCETT JEFFREY  国立研究開発法人理化学研究所, 数理創造プログラム, 上級研究員 (50727394)

研究分担者 印南 秀樹  総合研究大学院大学, 先導科学研究科, 教授 (90444140)
研究期間 (年度) 2020-04-01 – 2024-03-31
キーワードTransposable Elements / gene conversion / genome evolution
研究実績の概要

Transposable Elements are thought to be key drivers of evolution and have most likely contributed to various evolutionary processes such as the rewiring of regulatory networks. We previously discussed how processes such as selection within TEs and non-allelic gene conversion between TEs contribute to the evolution of TEs and the evolution of host species. The drastic increase in whole-genome sequence data of various different species in the recent years provides the opportunity to understand the evolution of TEs and their contribution to genome evolution, in great detail that was not possible before. One of the major achievement has been our results on the evolution of TEs and their contribution to genome size evolution and centromere evolution in buckwheat species. We found that the differential activity of a small number of LTR retrotransposon families account for ~500 Mb difference in genome size between closely related species. We also found that the species specific activity of a particular LTR retrotransposon family of the CRM clade is associated with neocentromere, suggesting its role in speciation via centromere turnover. We are currently investigating the role of positive selection within this TE family that allowed its proliferation and association with centromeres, and the role of non-allelic gene conversion using molecular evolutionary analyses and by collaboration with experimental biologists.

  • 研究成果

    (1件)

すべて 2023

すべて 雑誌論文 (1件) (うち国際共著 1件、 査読あり 1件)

  • [雑誌論文] Genome sequencing reveals the genetic architecture of heterostyly and domestication history of common buckwheat2023

    • 著者名/発表者名
      Fawcett JA, Takeshima R, Kikuchi S, Yazaki E, Katsube-Tanaka T, Dong Y, Li M, Hunt HV, Jones MK, Lister DL, Ohsako T, Ogiso-Tanaka E, Fujii K, Hara T, Matsui K, Mizuno N, Nishimura K, Nakazaki T, Saito H, Takeuchi N, Ueno M, Matsumoto D, Norizuki M, Shirasawa K, Li C, Hirakawa H, Ota T, Yasui Y.
    • 雑誌名

      Nature Plants

      巻: 9 ページ: 1236~1251

    • DOI

      10.1038/s41477-023-01474-1

    • 査読あり / 国際共著

URL: 

公開日: 2024-12-25  

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