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The evolution of developmental patterning under genetic duplication constraints.

Miguel A Fuentes1, David C Krakauer

  • 1Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, USA. fuentesm@santafe.edu

Journal of the Royal Society, Interface
|June 28, 2007
PubMed
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Gene duplication and deletion impact the stability of developmental patterns. Evolution favors robust developmental systems, reducing genetic redundancy for stable, adaptive structures.

Area of Science:

  • Evolutionary developmental biology
  • Systems biology
  • Genetics

Background:

  • Understanding the origins of complex adaptive structures is crucial.
  • Gene duplication and deletion are key evolutionary mechanisms.
  • Morphogenetic patterns arise from interacting activators and inhibitors.

Purpose of the Study:

  • To investigate the relationship between gene duplication/deletion and morphogenetic pattern stability.
  • To compare pattern stability in simple (2D) versus redundant (3D) systems.
  • To analyze developmental robustness and its evolutionary implications.

Main Methods:

  • Comparative analysis of 2D (single activator/inhibitor) and 3D (redundant activator/inhibitor) systems.
  • Modeling gene duplication, gene loss, and canalization potential steepness.

Related Experiment Videos

  • Assessing developmental robustness via stochastic escape times (canalization potential).

    • Main Results:

    • Gene duplication and deletion events can alter the pattern formation space.
    • Systems evolve towards steeper canalization potentials, reducing phenotypic variability.
    • Developmental robustness diminishes the advantage of genetic redundancy.

    Conclusions:

    • Evolution favors developmental robustness, leading to stable structures.
    • Increased robustness reduces the need for genetic redundancy.
    • This process influences the evolution of complex adaptive traits.