Chornobyl dog population shows genetic signatures of directional selection

Confidence and coverage

Confidence in this analysis: High confidence

Evidence coverage: Substantial coverage

• The central 2026 study is recent and lacks independent replication.
• Most Chornobyl-dog evidence comes from overlapping research teams.
• No direct measurements connect particular exposures, genetic variants, and survival traits.

• The underlying paper and several directly relevant peer-reviewed studies were accessible.
• The article’s principal factual claims could be compared with the study methods and conclusions.
• Remaining uncertainty concerns interpretation and causation rather than what the cited research reported.

Sources considered

1. Evidence of Selective Response in the Free-Breeding Dog Population in Chornobyl — Primary 2026 study reporting population comparisons and more than 100 candidate regions with selection signatures.
2. Is increased mutation driving genetic diversity in dogs within the Chornobyl exclusion zone? — Finds no evidence that increased mutation explains differentiation and provides accessible genomic data and methodological details.
3. Population dynamics and genome-wide selection scan for dogs in Chernobyl — Earlier study documents differentiation and preliminary directional-selection candidates while emphasizing the need for further validation.
4. The dogs of Chernobyl: Demographic insights into populations inhabiting the nuclear exclusion zone — Documents population structure, migration, ancestry differences, inbreeding, and physical barriers relevant to alternative explanations.
5. Genomic reconstruction reveals impact of population management strategies on modern Galápagos dogs — Provides the isolated-dog comparison data used to evaluate drift and demographic isolation.
6. What can be learned by scanning the genome for molecular convergence in wild populations? — Reviews false-positive risks and interpretive limitations of genomic selection scans.