Communication Dans Un Congrès Année : 2021

Contribution of Transposable Elements to Structural Variation and Phenotypic Adaptation in Tomato

Michael Alonge
  • Fonction : Auteur
Xingang Wang
  • Fonction : Auteur
Florian Maumus
Hajk-Georg Drost
  • Fonction : Auteur
Marco Catoni
  • Fonction : Auteur
Quentin Gouil
  • Fonction : Auteur
Sara Lopez-Gomollon
  • Fonction : Auteur
David Baulcombe
  • Fonction : Auteur
Jerzy Paszkowski
  • Fonction : Auteur
Michael C. Schatz
  • Fonction : Auteur
Zachary B. Lippman
  • Fonction : Auteur

Résumé

Structural variation has fueled phenotypic diversification and underlies important domestication and quantitative traits in crops plants. Nevertheless, the genetic drivers of plant structural variation at the population level remain poorly understood. We recently reported long-read sequencing of 100 diverse tomato genomes, which captured the extent and genomic features of structural variants. Most of this structural variation can be traced to transposable element (TE) activity. Annotation of TEs in 14 diverse accessions revealed their prevalence in tomato genomes, with a large fraction retaining transpositional potency, likely facilitating new structural variation. The Copia-like Rider family is over-represented within the TEs involved in structural variation and has generated structural variants underlying several traits of agricultural interest in tomato. Nevertheless, mechanisms regulating Rider activity remain unexplored. Through experimentally-controlled activation of the Rider family, we identified DNA methylation, phytohormones, and drought stress as molecular regulators of Rider activity in tomato. We further show differences in Rider distribution between Solanaceae species, suggesting contrasted evolutionary success of Rider and variable contribution to structural variation between species. Artificially promoting TE activity could generate agriculturally-relevant structural and epigenetic variation in tomato and related crops.

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Dates et versions

hal-05163380 , version 1 (15-07-2025)

Identifiants

  • HAL Id : hal-05163380 , version 1

Citer

Matthias Benoit, Michael Alonge, Xingang Wang, Florian Maumus, Hajk-Georg Drost, et al.. Contribution of Transposable Elements to Structural Variation and Phenotypic Adaptation in Tomato. Epigenetic Mechanisms of Crop Adaptation to Climate Change (EPI-CATCH), COST EPI-CATCH, Jul 2021, Virtual conference, United States. ⟨hal-05163380⟩
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