Researchers Map Ancient and Modern Bison Genomes
A 2026 study tracks bison genetic shifts over 20,000 years, revealing legacy cattle DNA and historic interbreeding patterns.
Updated on Oct. 24, 2026 in Life Sciences
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Researchers publishing in 2026 analyzed 160 bison genomes spanning 20,000 years to assess how genetic diversity changed over time. The study reveals evidence of cattle ancestry in modern populations alongside complex interbreeding between plains and wood bison.
Why it matters
Understanding the genetic heritage of bison helps conservationists manage isolated herds after historical population collapses. Scientists specifically aimed to quantify how much cattle DNA and plains bison intermixing currently persists in modern populations.
The study utilized DNA from 115 ancient specimens and 45 modern bison, finding cattle ancestry in roughly one-third of the modern animals. In these cases, cattle genetic material accounts for less than 2% of the total genome.
The players
Wood Buffalo National Park
This is a major protected area in Canada where significant interbreeding between wood and plains bison populations has been observed.
Head-Smashed-In Buffalo Jump
Located in Alberta, this archaeological site provided critical bone samples for the 2024 study on bison maternal lineages.
The details
Genetic data indicates that cattle crossbreeding likely occurred about 20 generations ago, while modern wood bison carry significant plains bison ancestry ranging from 7% to 64%. These findings follow a 2024 investigation that extracted mitochondrial DNA from ancient long bones found at the Head-Smashed-In Buffalo Jump in Alberta.
Timeline
20,000 years ago to the present: The timeframe of bison genomes included in the analysis.
10,500 years ago: The age of the oldest bison specimens retrieved from Wyoming archaeological sites.
6,200 to 6,600 years ago: The age of bone samples recovered from the Head-Smashed-In Buffalo Jump site.
1920s: The era when 7,000 plains bison were relocated to Wood Buffalo Park.
2026: The year the primary genomic study was published.
The Big Picture
This research updates the genetic markers and population history previously established by the Wood Buffalo National Park wood bison recovery program. By documenting specific genomic intermixing, the study shifts the paradigm for managing subspecies purity in modern North American herds.
The genomic data provided by this research will allow conservationists to better manage isolated bison populations across North America. These metrics could lead to more precise breeding programs designed to preserve the unique genetic characteristics of native wood bison.
The takeaway
Genetic mapping reveals that even iconic wild species have been shaped by historical interbreeding with domestic cattle. This information provides a roadmap for future conservation efforts focused on protecting the integrity of remaining bison populations.
Further reading
For more information on animal genomics, visit the Life Sciences section.
Source note: This article includes information reported by Hindustan Times.
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