Why do Arabian horse imports from Saudi Arabia don’t have ‘substrains’?

Blog reader Mathias, from Germany, asked a pertinent question a few weeks ago: How come, he observed, “the horses from Saudi sources […] mostly have one strain name and no substrain, like Turfa and […] the mare Ghazala imported to Germany from Saudi Arabia”? I had never noticed before, but Mathias is correct. Check out the available, recorded information on the Saudi horses sent to Egypt’s royal Inshass Stud as gifts: Nafaa, a Kuhaylah, but what Kuhaylah? Hind, a Saqlawiyah, but what Saqlawiyah? Mabrouka, a Saqlawiyah, again with no “substrain”, or marbat; El Kahila, a Kuhaylah with no marbat, etc. Now check out the recorded information on the Saudi horses imported to the USA: *Mahraa and her daughter *Muhaira: Ubayyan, but which Ubayyan? *Al Hamdaniah: Hamdaniyah, but no substrain; *Taamri, *Jalam al-Ubayyan, *Al Obayya: all Ubayyan, no substrain; *Amiraa, *Rudann, *Halwaaji, *Sindidah, *Bedowia El Hamdani: all Hamdanis but no substrain; *Turfa: Kuhaylan, but no substrain, etc. etc. These horses came from famous and well established studs like that of Abd al-Aziz ibn Saud at Al-Khorma, or that of Saud Ibn Jalawi in al-Hasa, they were from the Bedouin tribes, who were justifiably proud of their horses’ origins and who carefully, albeit orally, transmitted…