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A Technique to Screen American Beech for Resistance to the Beech Scale Insect Cryptococcus fagisuga Lind.
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Genomic Vulnerability to Climate Change of a Seasonal Dispersal Insect Within a Small Spatial Scale.

Yuyao Zhang1,2, Huifang Li3,4, Xiaofei Liu2,5

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Gene flow homogenizes genetic variation in oriental fruit flies, while natural selection drives adaptation in specific genes. This impacts insect migration and climate change resilience.

Keywords:
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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Genomics

Background:

  • Seasonal migration is crucial for animal survival and adaptation.
  • Insect migration patterns, unlike typical animal migrations, are often complex and reticular.
  • Understanding insect migration dynamics is vital for predicting responses to climate change.

Purpose of the Study:

  • To investigate the genetic patterns of seasonal dispersal in the oriental fruit fly (Bactrocera dorsalis).
  • To evaluate the adaptive potential of migratory insects to future climate scenarios.
  • To understand the interplay between gene flow and natural selection in insect seasonal dispersal.

Main Methods:

  • Genomic data analysis from 32 populations of Bactrocera dorsalis across diverse habitats.
  • Population structure analysis, genomic landscape, and vulnerability assessments.
  • Climate change impact prediction on migratory populations.

Main Results:

  • No significant population structure was found despite ecological niche differences.
  • Distinct genetic compositions and reduced adaptive potential were observed in northwestern and northeastern populations.
  • Gene flow homogenizes genome-wide variation, while natural selection targets specific adaptive loci.

Conclusions:

  • Gene flow is a primary driver of genetic uniformity in migratory insects.
  • Natural selection plays a key role in shaping adaptive genetic variation.
  • Findings inform predictions of insect population persistence under future climate conditions.