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Resurrection of Dormant Daphnia magna: Protocol and Applications
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Developmental evolution facilitates rapid adaptation.

Hui Lin1, Romas J Kazlauskas1,2, Michael Travisano3,4

  • 1BioTechnology Institute, University of Minnesota, St Paul, Minnesota, 55108, USA.

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|November 23, 2017
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Summary
This summary is machine-generated.

Developmental evolution drives rapid adaptation in fungi. Under selection, Trichoderma citrinoviride evolved significantly increased spore dispersal via developmental changes, enhancing survival and adaptation.

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Area of Science:

  • Evolutionary biology
  • Developmental biology
  • Microbial genetics

Background:

  • Developmental evolution is a key driver of rapid adaptation.
  • Observing the selective advantages and mechanisms of developmental evolution is challenging.

Purpose of the Study:

  • To investigate rapid adaptation through developmental evolution in fungi.
  • To observe the selective benefits and mechanisms of increased dispersal rates.

Main Methods:

  • Serial transfer of Trichoderma citrinoviride populations over 85 generations.
  • Selection for growth initially, then observing shifts in dispersal.
  • Analysis of gene expression changes related to growth and spore production.

Main Results:

  • Populations evolved a thousandfold increase in single-celled asexual conidial spore production.
  • Spore production occurred three times sooner, and germination was 50% faster.
  • Significant gene expression changes showed tight regulatory control for growth down-regulation and spore production up-regulation.

Conclusions:

  • Complex developmental changes facilitate rapid adaptation under stringent selection.
  • Developmental evolution provides a mechanism for enhanced dispersal and survival.
  • Both fixed and plastic gene expression changes contribute to adaptation.