Polyphenism in Insects

@article{Simpson2012PolyphenismII,
  title={Polyphenism in Insects},
  author={Stephen James Simpson and Gregory A. Sword and Nathan Lo},
  journal={Current Biology},
  year={2012},
  volume={22}
}

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References

SHOWING 1-10 OF 172 REFERENCES
Gene expression and the evolution of insect polyphenisms †
  • J. Evans, D. Wheeler
  • Biology
    BioEssays : news and reviews in molecular, cellular and developmental biology
  • 2001
TLDR
This work discusses polyphenisms and molecular genetic tools now available to unravel their developmental bases in insects and focuses on several recent studies that have tracked gene‐expression patterns during social insect caste determination.
Phenotypic plasticity and diversity in insects
  • A. Moczek
  • Biology
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2010
TLDR
It is argued that phenotypic plasticity generates novel targets for evolutionary processes to act on, as well as brings about trade-offs during development and evolution, thereby diversifying evolutionary trajectories available to natural populations.
Developmental mechanisms of threshold evolution in a polyphenic beetle
TLDR
Larval larvae of populations that have evolved a larger threshold body size have to accumulate greater mass to become competent to express the horned morph, are less sensitive to the juvenile hormone (JH) analogue methoprene, and exhibit a delay in the sensitive period for meethoprene relative to other developmental events.
Evolution of a Polyphenism by Genetic Accommodation
TLDR
It is shown that a mutation in the juvenile hormone-regulatory pathway in Manduca sexta enables heat stress to reveal a hidden reaction norm of larval coloration, facilitating the origin of novel adaptive phenotypes.
Rapid evolution of a polyphenic threshold
TLDR
The results support the view that certain components of the developmental control mechanism that underlie polyphenic development can evolve rapidly in natural populations and may provide important avenues for phenotypic differentiation and diversification in nature.
Phenotypic plasticity of insects: mechanisms and consequences.
TLDR
Phenotypic Plasticity and Evolvability: An Empirical Test with Experimental Evolution.
The locust foraging gene.
TLDR
The results suggest that differences in PKG enzyme activity are correlated to well-established phase-related behavioral differences, and lay the groundwork for functional studies of the locust for gene and its possible relations to locust phase polyphenism.
The Evolution of Aphid Life Cycles
The life cycles of aphids are among the most remarkable of any animal group. They include parthenogenetic and sexual generations, elaborate polyphen­ isms, and obligate shifting between unrelated
Aphid wing dimorphisms: linking environmental and genetic control of trait variation
  • J. Brisson
  • Biology
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2010
TLDR
Investigation into molecular mechanisms underlying phenotypic plasticity in the aphid wing dimorphism system is reviewed, offering the opportunity to compare and contrast the mechanistic basis of environmental and genetic control of similar dimorphisms.
Phylogenetic perspectives on the evolution of locust phase polyphenism
TLDR
It is demonstrated that locusts and closely related nonlocusts, express similar phenotypic plasticity due to phylogenetic conservatism, and it is argued that it is crucial to study the evolution of locust phase polyphenism from both adaptive and phylogenetic perspectives.
...
...