Dragon disciple increases bloodrager's draconic bloodline. My character will have 5 levels of draconic bloodrager and 10 levels of dragon disciple.
Are special abilities gained by dragon disciple based on bloorager or sorcerer?
Specifically: Wings and bloodline feats.
If wings are based on sorcerer he can use fly (almost) anytime.
If wings are based on bloodrager's dragon wings he can fly only while raging.
Similarly bonus feats can be based on sorcerer (has also quicken spell and skill focus: arcane knowledge) or bloodrager (has also cleave).
Personally I think it should be based on bloodrager.