 The relationship between the Sorraia and other breeds remains largely undetermined , as is its relationship to the wild horse subspecies , the Tarpan and the Przewalski 's Horse . The Sorraia originally developed in the southern part of the Iberian <unk> d 'Andrade hypothesized that the Sorraia would be the ancestor of the Southern Iberian breeds . <unk> , scientists place the Sorraia as closely related to the <unk> and the <unk> , but genetic studies using mitochondrial DNA show that the Sorraia forms a cluster that is largely separated from most Iberian breeds . Some evidence links this cluster with <unk> and domestic Mongolian horses . At the same time , one of the maternal lineages is shared with the <unk> . Genetic evidence has not supported an hypothesis that the Sorraia is related to the <unk> horse , an African breed introduced to Iberia by the Moors . 
