For example, in the 1950s, the Arabian stallion Indraff sired two foals, a filly and a colt, by the Quarter Horse mare Cotton Girl.

Both foals went on to successful careers, with the filly, named Indy Sue, earning an American Quarter Horse Association Performance Register of Merit and herself foaling three registered Quarter Horses.

Before the American Paint Horse Association stud book was closed in the 1980s, a few sabino Arabian stallions were inspected and registered.

[3] In 1984, the United Quarab Registry (UQR) was formed as the breed association for Quarter Horse/Arabian crossbred horses.

In 1999 the International Quarab Horse Association was formed to register the breed, functioning under the same guidelines as the UQR and soon spreading overseas, with member groups in Germany and the Netherlands.