most flowerhorn do NOT have Salvini in them... i think this is because they grow so slowly and dont hybridize as easily as the larger hardier species... i am actually planning on doing a project in the near future to try to develop a "dwarf" flowerhorn using salvini blood... this will hopefully create a fish that has the features of a flowerhorn, but in a smaller adult package for a smaller tank, without stunting or other adverse affects... this will take many generations though!
but back to your question: most flowerhorn dont carry salvini, but it is possible to hybridize them.