Crediting to AA on mixed *A/OW PNR
I'm flying YUL-ORD-DOH-BKK. YUL-ORD is on AC (*A) while ORD-DOH-BKK is on QR (OW). I booked through Qatar Airways (issued by QR on QR stock) and my AAdvantage number is on file with them. Obviously I'm mostly concerned about crediting my QR flights to AA, but since I do have one segment on AC, I'd ideally like to credit that to another *A program.
Can I have different segments be credited to different programs? I'm worried that if I change the first segment to a *A carrier, something will go wrong and I won't be able to credit the QR segments to AA. How does all this work?