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Putting the genes into community genetics.

Gina M Wimp1, Jewel Tomasula1, Matthew B Hamilton1

  • 1Georgetown University, Washington, DC, USA.

Molecular Ecology
|September 19, 2019
PubMed
Summary

This study links plant genes to insect biodiversity. Researchers used a common garden experiment and genome-wide association study in trembling aspen to find specific genes influencing phytochemical traits and insect community composition.

Keywords:
community ecologycommunity geneticsecological geneticsgenome-wide association study (GWAS)genomics/proteomicsinsects

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Area of Science:

  • Evolutionary biology
  • Ecology
  • Community genetics
  • Molecular ecology

Background:

  • Plant genetic variation impacts community and ecosystem processes.
  • Previous research has not identified specific plant genes responsible for community phenotypes.
  • The "genes-to-ecosystems" framework links genetically based plant traits to ecological consequences.

Purpose of the Study:

  • To test for the genetic basis of tree traits that shape insect community composition.
  • To identify specific plant genes underlying heritable traits that explain patterns of insect biodiversity.

Main Methods:

  • Common garden experiment with trembling aspen.
  • Genome-Wide Association Study (GWAS).
  • Analysis of genomic regions associated with phytochemical traits.

Main Results:

  • Genomic regions linked to phytochemical traits best explain variation in herbivore community composition.
  • Specific genes associated with leaf-modifying herbivores and ants were identified.
  • This study provides one of the first genetic links to insect biodiversity patterns.

Conclusions:

  • Genetically based phytochemical traits are key drivers of insect community composition in trembling aspen.
  • This research advances the "genes-to-ecosystems" framework by identifying specific genes.
  • The findings offer insights into the genetic underpinnings of plant-insect interactions and biodiversity.