Relationship between the left-right asymmetric motor-related conformation and the orientation of facial hair whorls in Japanese Kiso horses.

This research article focuses on understanding the relationship between the inherited attributes associated with movement and structure (motor-related conformation) and the orientation of facial hair patterns in a specific breed of horses, Japanese Kiso. It suggests that the direction in which a horse’s facial hair grows could hint at its physical characteristics, particularly in those where hair grows in a counterclockwise pattern.

Study Methodology

• Eleven Japanese Kiso horses participated in the study.
• The horses were divided into three groups according to the pattern of their facial hair growth: clockwise, counterclockwise, and radial (growing outward from a central point).
• Researchers marked six specific locations, known as anatomical landmarks, on each side of the horse’s body.
• Three distinct measurements were taken: the height of the landmarks, the distance between adjacent landmarks, and the angle formed by those adjacent landmarks.

Findings

• The counterclockwise group of horses showed a tendency to have higher values on the left side of their bodies when compared to the right side. This meant the key landmarks on the left side of the horse tends to be higher or more pronounced than the ones on the right side.
• When comparing the height of landmarks between the left and right sides, there were significant differences in the counterclockwise group. This shows a strong association between the direction of the facial hair whorl and the physical characteristics of the horses.

Conclusion

• The orientation of facial hair whorls can suggest the inherited motor-related conformation of Japanese Kiso Horses.
• This connection was particularly evident in the group where facial hair grew in a counterclockwise pattern.
• However, this research needs to be extended to other horse breeds and larger samples to confirm if this pattern persists universally.