Genetic Diversity and Population Structure of Canid Species

Canid species—from wolves and foxes to jackals and domestic dogs—exhibit remarkable genetic diversity shaped by evolutionary history, ecological adaptation and human influence. Genome sequencing has revealed deep lineages predating the last glacial cycles, while population‐level studies using mitochondrial DNA and nuclear markers have elucidated patterns of isolation by distance, geographic barriers and historical refugia. Domestication and introgression between wild and domestic forms have further enriched canine gene pools, with stray or feral populations acting as conduits for gene flow. Landscape features such as mountain ranges, rivers and habitat fragmentation foster genetic structure by limiting dispersal, whereas urban and agricultural corridors may enhance connectivity for adaptable generalists. Understanding these dynamics informs conservation of endangered canids, management of invasive populations and control of vector‐borne diseases, underscoring the global significance of canid genetic research.

Research from Nature Portfolio

Recent genomic analyses of East Eurasian canids have sequenced whole genomes of ancient and modern forms to resolve the dog’s origin. These studies show that Japanese wolves are the closest wild relatives of domestic dogs, supporting an East Asian centre of domestication. Phylogenomic reconstruction and demographic modelling indicate a prehistoric introgression from ancestral Japanese wolves into the lineage leading to East Eurasian dogs, predating the archipelago’s settlement. This work refines the timeline of dog–wolf divergence and highlights the role of extinct wolf populations in shaping modern canine genomes.

Genetic Diversity and Population Structure of Canid Species publication trend

The graph below shows the total number of articles in genetic diversity and population structure of canid species across all publications each year (not limited to Nature Index journals).

Technical terms

Genetic diversity: Variation in DNA sequences among individuals or populations, reflecting evolutionary potential and adaptive capacity.

Population structure: The organisation of genetic variation within and among populations, often influenced by geographic or ecological barriers.

Phylogeography: Study of historical processes that shape the geographic distribution of genetic lineages.

Introgression: Incorporation of genetic material from one population or species into another through hybridisation and backcrossing.

Microsatellite marker: Short, repeating DNA sequences used to assess genetic variability and relatedness at fine spatial scales.

References

1. Japanese wolves are most closely related to dogs and share DNA with East Eurasian dogs. Nature Communications (2024).
2. Geographic barriers but not life history traits shape the phylogeography of North American mammals. Global Ecology and Biogeography (2024).
3. Genetic and spatial characterization of the red fox (Vulpes vulpes) population in the area stretching between the Eastern and Dinaric Alps and its relationship with rabies and canine distemper dynamics. PLOS ONE (2019).
4. Mitochondrial Analysis of the Most Basal Canid Reveals Deep Divergence between Eastern and Western North American Gray Foxes (Urocyon spp.) and Ancient Roots in Pleistocene California. PLOS ONE (2015).