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Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks
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A COMPARISON OF TWO STICKLEBACKS.

Troy Day1, John Pritchard1, Dolph Schluter1

  • 1Department of Zoology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.

Evolution; International Journal of Organic Evolution
|June 2, 2017
PubMed
Summary
This summary is machine-generated.

Plastic trophic morphology in stickleback fish is adaptive, with diet influencing shape. Greater diet variability in one species correlates with higher plasticity, indicating its evolutionary role and potential.

Keywords:
Adaptationgenotype-by-environment interactionphenotypic plasticitysticklebackstrophic morphology

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Area of Science:

  • Ecology and evolutionary biology
  • Phenotypic plasticity
  • Trophic morphology

Background:

  • Understanding adaptive phenotypic plasticity is crucial for ecology and evolution.
  • Investigating the role of plasticity in shaping trophic morphology and interspecific variation is key.
  • Assessing the evolutionary potential of plasticity requires examining genetic variation.

Purpose of the Study:

  • To determine if observed plastic trophic morphology is adaptive.
  • To quantify the contribution of plasticity to interspecific morphological differences.
  • To investigate the evolution of plasticity under different selective regimes.
  • To identify genetic variation for phenotypic plasticity in contemporary populations.

Main Methods:

  • Raising fish from two stickleback species on species-specific diets.
  • Quantifying morphological changes in response to dietary treatments.
  • Comparing plasticity levels between species with differing natural diet variabilities.
  • Employing a full-sib experimental design to assess genetic variation.

Main Results:

  • Both stickleback species showed adaptive morphological plasticity, with each resembling the other species on its natural diet.
  • Diet reversal reduced interspecific morphological differences by -1% to 58%.
  • The species with a more variable natural diet exhibited greater morphological plasticity.
  • Genetic variation for plasticity was confirmed in contemporary populations.

Conclusions:

  • Phenotypic plasticity in trophic morphology is adaptive in sticklebacks.
  • Diet variability is a significant factor in the evolution of plastic trophic morphology.
  • Contemporary stickleback populations possess genetic variation for plasticity, indicating evolutionary potential.