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No Pedigree, No Problem: Genomic Inbreeding Tracks Genetic Rescue With High Resolution.

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  • 1Department of Biological Sciences Western University London Ontario Canada.

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|April 22, 2026
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This summary is machine-generated.

Genomic monitoring of inbreeding in bighorn sheep revealed a 24% decrease after genetic rescue, contrasting with traditional methods. This highlights the power of genomic approaches for effective wildlife conservation strategies.

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Area of Science:

  • Conservation Genetics
  • Population Genomics
  • Wildlife Ecology

Background:

  • Habitat fragmentation and isolation increase inbreeding risks for wildlife populations.
  • Effective inbreeding monitoring is vital for assessing extinction risks and conservation success.
  • Traditional pedigree-based methods have limitations in accurately tracking inbreeding dynamics.

Purpose of the Study:

  • To compare pedigree and genomic inbreeding estimates in a wild bighorn sheep population.
  • To evaluate the effectiveness of genomic approaches in monitoring conservation interventions.
  • To assess changes in inbreeding following a population bottleneck and genetic rescue.

Main Methods:

  • Long-term monitoring of wild bighorn sheep (Ovis canadensis) from 1972 to present.
  • Comparison of pedigree inbreeding coefficients (F_PED) with genomic inbreeding coefficients (F_ROH).
  • Analysis of inbreeding changes after a severe population bottleneck and subsequent genetic rescue via translocation.

Main Results:

  • Genomic inbreeding (F_ROH) decreased by 24% after genetic rescue efforts commenced.
  • Pedigree inbreeding (F_PED) showed an increase, likely due to improved pedigree depth over time.
  • Genomic approaches proved more effective than pedigree methods in detecting temporal inbreeding changes.

Conclusions:

  • Genomic inbreeding monitoring (F_ROH) is superior for tracking conservation outcomes in wild populations.
  • Genomic methods overcome biases associated with increasing pedigree completeness over time.
  • F_ROH is a valuable tool for assessing the genetic impact of conservation interventions.