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Using mustard genomes to explore the genetic basis of evolutionary change.

  • Author(s): Nikolov, Lachezar A
  • Tsiantis, Miltos
  • et al.
Abstract

Recent advances in sequencing technologies and gene manipulation tools have driven mustard species into the spotlight of comparative research and have offered powerful insight how phenotypic space is explored during evolution. Evidence emerged for genome-wide signal of transcription factors and gene duplication contributing to trait divergence, e.g., PLETHORA5/7 in leaf complexity. Trait divergence is often manifested in differential expression due to cis-regulatory divergence, as in KNOX genes and REDUCED COMPLEXITY, and can be coupled with protein divergence. Fruit shape in Capsella rubella results from anisotropic growth during three distinct phases. Brassicaceae exhibit novel fruit dispersal strategy, explosive pod shatter, where the rapid movement depends on slow build-up of tension and its rapid release facilitated by asymmetric cell wall thickenings.

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