xlntperuvian, dbarabians, I think you both are correct. "peruvian is correct that the south americans that created the peruvian breed used no arabians in their foundation or subsequent stock. However, arabian is correct that all of the progenitor breeds used including the barb have arabian in their lines. Ironicly, I own both a peruvian and a kiger mustang. Both of which get a lot of their influence from the barb and spanish horses.
Back when Arabians, Barbs, Akhal-Teke's first existed, no one can be sure which came first. There was no breed then. There was regional type. And they may have all come from one totally different breed like something akin to the Tarpan or Przewalski. We don't know.
Andalusians were created from Sorraia and Barb, but not Arabian. I don't believe genetic markers ever traced Andalusian back to Arabian bloodlines like they did the Barb and Sorraia, and Andalusian blood lines are **** well near perfectly recorded. Sorraia is like the Tarpan and Przewalski, older than Arabian. Sorraia was the "type" that influenced Southern Europe.
You can't just say that Arabian was the end all be all, because the breed that exists today was unknown that far back in civilization. They can genetically test for certain markers that exist in todays breeds that were thought to be other breeds. That is why we know Kigers are "true" mustangs, they have the markers from Sorraias and other Iberian based breeds that were imported by Spain and Portugal. And you can't say the Sorraia was influenced by the Arabian, or that the Arabian influenced the Iberian breeds. The Barb is not considered to have been influenced by the Arabian. I believe they probably grew up along side each other, maybe came from another base type.
Same thing with the Akhal-Teke. It's the chicken and the egg question, which came first. It is known that Akhal-Tekes were well hidden by their tribes, and so were Arabians. Why would they have influenced each other in completely different geographical areas when they were hidden? Developed from a base type, probably. Influenced each other? Probably not.