International Journal of Animal and Wildlife Research

Vol. 1 No. 1 (2026): Volume 1, Issue 1 (2026)
Articles

Genetic diversity, population structure and conservation genetics approaches for the long-term protection of wildlife species

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Published 2026-10-18

Keywords

  • Conservation genetics, genetic diversity, population structure, effective population size, genetic rescue, landscape genetics, conservation genomics

Abstract

Genetic diversity underlies the adaptive potential, demographic resilience and long-term persistence of wildlife populations, yet it remains among the least monitored dimensions of biodiversity relative to species and ecosystem diversity. This review synthesizes current evidence on genetic diversity, population genetic structure and the conservation genetics and genomics approaches used to safeguard wildlife populations against extinction, drawing on peer-reviewed primary studies, invited reviews and international policy documents addressing effective population size thresholds, inbreeding depression, genetic rescue, landscape genetics, molecular-marker technologies and global genetic-diversity indicators. Small, fragmented populations are shown to be disproportionately vulnerable to genetic drift, inbreeding depression and reduced adaptive capacity. Historically influential thresholds such as the 50/500 rule remain widely cited but are now considered insufficient in isolation. Genetic rescue, illustrated by the Florida panther and Mexican wolf, together with the long-studied genetic depletion of the cheetah, demonstrates both the promise and the risk associated with restoring gene flow to isolated populations. The transition from microsatellite genotyping toward genome-wide single-nucleotide polymorphism (SNP) and whole-genome approaches has expanded analytical resolution without eliminating the practical value of earlier marker systems, and the 2022 Kunming-Montreal Global Biodiversity Framework has, for the first time, embedded measurable genetic-diversity indicators into binding international policy. Long-term protection of wildlife is found to require integrating genetic and genomic evidence into population viability assessment, landscape connectivity planning, captive-breeding management and international reporting frameworks, while addressing persistent gaps in monitoring capacity, data availability and equitable governance of genetic resources.

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