The Oldest Horse Breed: Searching for Genetic and Historical Archaic Defining the "oldest" horse breed is a complex scientific task at the intersection of archaeozoology, paleogenetics, and traditional breeding. The concept of "ancientness" can be interpreted in two ways: as a breed with the most archaic, closest to wild ancestors, phenotypic traits, or as a breed whose documented history and targeted breeding by humans span the longest number of centuries. According to the totality of data, the Przewalski horse (Equus ferus przewalskii) is considered the unconditional leader in both categories, however, several candidates enter the discussion about the oldest domestic breeds, each demonstrating a unique path of evolution. 1. The Przewalski Horse: A Living Relic of the Wild Past. This is not a breed in the classical sense of breeding, but a separate subspecies of wild horse (tarpan), discovered for science by N.M. Przewalski in 1879. Its ancientness lies in the inviolability of the gene pool. Genetic isolation: Research conducted in 2018, sequencing the genomes of horses from the Botai burial site (Kazakhstan, 5500 years ago), showed that the Botai horses were not ancestors of modern domestic horses, but domesticated Przewalski horses. The modern Przewalski horse is a direct descendant of these ancient domesticated horses, which later became wild. It has 66 chromosomes (64 in domestic horses), indicating a separate evolutionary branch. Archaic phenotype: The bay (yellow-sandy) color with a dark "belt" along the spine, a standing and short mane (without a forelock), a stocky build, and a large head. This is the look of a horse from the paleolithic era, captured in cave paintings. Status: Thanks to reintroduction programs from zoos, today it is the only truly wild, never domesticated in modern history subspecies, preserved in the wild in Mongolia and China. 2. The Oldest Domestic Breeds: Competitors for the Title. If we consider breeds created by humans, several group ... Read more