Genetic and Behavioral Studies in Domestic Canines

Domestic dogs exhibit unparalleled phenotypic diversity in morphology, physiology and behaviour, a legacy of millennia of selective breeding and close association with human societies. Advances in genomic technologies have enabled comprehensive surveys of canine genetic variation, revealing how demographic history, selective sweeps and hybridisation have shaped both form and function. Complementary behavioural assessments have elucidated the genetic basis of temperament, cognitive traits and breed-specific propensities. Together, these investigations provide insight into fundamental processes of mammalian evolution and development, while informing breed health, welfare and medical genetics. By integrating whole-genome sequencing, genome-wide association studies and detailed behavioural profiling, researchers are uncovering the loci and pathways that underlie complex traits such as size, skull shape, social cognition and disease susceptibility. The global significance of this work spans veterinary practice, conservation of village dog populations and translational models for human conditions, underscoring the domestic dog as a powerful system for genetics and behaviour research.

Research from Nature Portfolio

Recent studies have harnessed large-scale whole-genome sequencing of hundreds of breeds and wild canids to map genetic variants driving morphological traits. Analyses combining selective sweep detection with genome-wide association have identified high-impact alleles responsible for variation in body weight, coat characteristics and skeletal proportions, explaining over 90 per cent of size differences across breeds. In parallel, a landmark canine genome-wide association study with more than 4,200 dogs genotyped at dense marker panels has accelerated the mapping of complex disease loci, uncovering risk genes for hip and elbow dysplasia, epilepsy, lymphoma and mast cell tumours. Simulation studies demonstrate that moderate increases in sample size and marker density will suffice to resolve additional moderate- to large-effect loci, highlighting efficient strategies for future discovery in canine biomedical genetics.

Genetic and Behavioral Studies in Domestic Canines publication trend

The graph below shows the total number of articles in genetic and behavioral studies in domestic canines across all publications each year (not limited to Nature Index journals).

Technical terms

Whole-genome sequencing (WGS): Determination of the complete DNA sequence of an organism’s genome in a single process.

Genome-wide association study (GWAS): A method that scans the genome for common genetic variants in different individuals to see if any variant is associated with a trait.

Selective sweep analysis: Identification of genomic regions with reduced genetic diversity indicative of recent positive selection.

Single-nucleotide variant (SNV): A change of a single base pair in the DNA sequence among individuals.

Quantitative trait locus (QTL): A genomic segment that contributes to variation in a measurable trait, often identified through linkage or association mapping.

References

1. Genome sequencing of 2000 canids by the Dog10K consortium advances the understanding of demography, genome function and architecture. Genome Biology (2023).
2. Whole genome sequencing of canids reveals genomic regions under selection and variants influencing morphology. Nature Communications (2019).
3. Complex disease and phenotype mapping in the domestic dog. Nature Communications (2016).
4. A Simple Genetic Architecture Underlies Morphological Variation in Dogs. PLOS Biology (2010).
5. Identification of Genomic Regions Associated with Phenotypic Variation between Dog Breeds using Selection Mapping. PLOS Genetics (2011).