Originally Posted by realgaga

Merging PNRs isn't possible (splitting them is though)

As a courtesy, QR will check through baggage (so you don't have to collect it, in your case DOH) even if you have separate bookings (see QR Interlining (Baggage))
When checking in, print out or screenshot the page on QR's website since some contract staff might not be aware of the policy.