[Population genetic parameters of aboriginal Yakut horses as related to modern breeds of the domestic horse Equus caballus L].

The study analysed the genetic traits of aboriginal Yakut horses, comparing them with other global horse breeds, uncovering that Yakut horses have a low level of hereditary variation and are genetically closest to some Central Asian horses. The finding contributes to understanding the dispersal route of ancient horses and the early stages of horse domestication.

Research Methodology

• The team of researchers undertook a comprehensive examination of the blood and protein markers of the aboriginal Yakut horses. These horses have been isolated for a long period, and as such, studying them provides a relatively uncontaminated glimpse into the genetics of older horse breeds.
• They investigated a total of 124 alleles, including 48 alleles of seven blood-group loci and 76 alleles of ten loci for enzymes and other proteins. “Alleles” refer to different forms of the same gene, so the researchers were essentially investigating variations of key blood and protein traits.
• They then compared these genetic traits to those of 85 different horse breeds from all over the world, using a computer analysis to examine the genetic distances.

Key Findings

• The Yakut horses had a low level of hereditary variation. This supports the idea that this breed is quite old and has been an isolated population for an extended period.
• Interestingly, despite their geographic isolation in Siberia, the Yakut horses had the most genetic similarity with Central Asian breeds like the Akhal Teke, Arabian, Yabou, and Caspan Pony (Iran).
• The study also provided insights into the dispersal route of ancient horses, showing they spread from America, through Siberia and Central Asia, to Africa, and Eastern Europe.
• Research findings indicate the potential relationship between genetic, ecological factors, and the physical characteristics in defining different horse breeds, i.e., racing and draft breeds.

Contribution to the Field

• The research highlights the long history and evolutionary path of Yakut horses and their connection with ancient and modern horse breeds. This knowledge contributes significantly to the broader understanding of horse domestication and the ancient history of horse movement across various regions of the world.
• Scientifically, the study provides a genetic picture of horse domestication and breed formation.