Q.Apricot Rootstocks
Hi. I am planting 50 apricot trees that I’m growing from seeds — Armenikos (Brought them from Armenia) I am new in this field.
Question: Do I need rootstock for these apricots? If yes what kind? Please give me detailed information and explanation about these rootstocks,
Best regards,
Thank you.

I found this article that discusses rootstock options. It seems that apricot seedlings that are not grafted, have a higher rate of pest and disease, specifically root knot nematode and crown gall disease. http://fruitandnuteducation.ucdavis.edu/fruitnutproduction/Apricot/Apricot_scions__rootstock/

You do not need another rootstock unless you are trying to breed for specific disease resistances. They can grow on their natural rootstock just fine.