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Developmental plasticity: re-conceiving the genotype.

Sonia E Sultan1

  • 1Biology Department, Wesleyan University, Middletown, CT 06459, USA.

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|August 26, 2017
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Summary
This summary is machine-generated.

Organism traits are not solely determined by genes but also by environmental interactions. This perspective reveals developmental plasticity and transgenerational epigenetic inheritance as key evolutionary drivers.

Keywords:
genetic determinismgenotype by environment interactionnorm of reactiontransgenerational plasticity

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Area of Science:

  • Evolutionary biology
  • Developmental biology
  • Genetics

Background:

  • Historically, organism traits (phenotypes) were viewed as direct outcomes of genetic programming (genotype).
  • The Modern Synthesis framework often treats evolution as a selection process acting on genetic variants.
  • Recent research highlights that genotypes express differently based on environmental conditions.

Purpose of the Study:

  • To reconceive the genotype not as a fixed program, but as a repertoire of potential developmental outcomes (norm of reaction).
  • To explore the evolutionary implications of genotype-environment interactions and developmental plasticity.
  • To investigate the role of environmental influences across generations.

Main Methods:

  • Conceptual re-evaluation of genotype-phenotype relationships.
  • Analysis of developmental pathways and environmental influences.
  • Consideration of epigenetic and cytoplasmic inheritance mechanisms.

Main Results:

  • Plastic phenotypic responses to specific environments represent a developmental mode of adaptive variation.
  • Genetic diversity's availability to natural selection is contingent on environmental conditions.
  • Environmental factors can induce transgenerational inheritance of non-genetic adaptations.

Conclusions:

  • A nuanced understanding of the genotype's evolutionary role requires acknowledging its environmental responsiveness.
  • Evolutionary research should focus on the complex interactions between genotypes, environments, and ancestral environments.
  • Developmental plasticity and epigenetic inheritance are crucial factors in adaptive evolution.