That is unlikely to be successful. You can usually get away with this with the SPAU transport, but the SPDD transport is riskier. This is because the objects in the SPDD transport need to be imported into the system early in the whole process, so you can't really import them after the upgrade. You can try importing them during the upgrade, but that may not work.
Besides, what you really want to do here is simulate to the best of your ability how your support pack upgrade will go in production. I assume you don't intend to forget about the SPDD import during the production upgrade, so the only way for you to know that everything will work properly is to do your QAS upgrade the same way. With this in mind, I think you will be better served by resetting your upgrade in QAS and starting over.
Regards,
Matt