Genetic analysis of three South African horse breeds.

This article examines the genetic diversity of three South African horse breeds, namely the Nooitgedacht, Boerperd, and Basuto Pony, and their similarities with both domestic and international horse breeds.

Genetic Analysis

The research centered on analyzing genetic variability in the three horse breeds. The indicators used to measure this were:

• Blood-group loci: these are genetic markers found in the blood used to determine genetic diversity. In this study, seven blood-group loci were considered.
• Biochemical genetic loci: these are genes that determine the formation of various biochemical components of the body’s functioning. For this study, 10 such loci were examined.

Results and Analysis of Genetic Variability

The genetic variability was measured by observed heterozygosity, which is the measure of the diversity of alleles (forms of a gene) at a specific locus in a population. Here are the conclusions from this examination:

• The Nooitgedacht, Boerperd, and Basuto Pony breeds exhibited intermediate heterozygosity when compared to other domestic horse breeds.
• Among the three, the Boerperd breed showed the highest heterozygosity, indicating that it has the greatest genetic diversity, while the Basuto Pony demonstrated the lowest, implying a lower genetic variability.

Genetic Comparison with Other Breeds

When comparing the three South African horse breeds to other domestic and international horse breeds, this study found:

• The Nooitgedacht, Boerperd, and Basuto Pony were more genetically similar to each other than to any other domestic horse breeds, suggesting they have a distinct gene pool unique to South Africa.
• Furthermore, these South African breeds resembled other breeds such as the Thoroughbred, Holstein, Trakehner, and Hanovarian, in addition to North American breeds such as the Saddlebred, Standardbred, and Morgan Horse more closely than other breeds. This could indicate a shared ancestry or a similar genetic development over the years.