So, based on good reason (theory), a very basic understanding of genetics and a lack of solid evidence to the contrary, I would
broadly conclude that the
breeding of two bee strains (races) with dis-similar genetics does not result in aggressive offspring (but likely could result in Heterosis) - thank you to
all the Members that have contributed to this Thread.
IF there is aggression in the offspring, then this is much more likely to be caused by an aggressive trait from one of the parents; in relation to bees, the traits of the Queen mother is relatively known, her daughter the Virgin Queen must (open) mate with multiple drones, and therefore any aggression in
her offspring comes from one or more of these drones: The fact that a particular drone is genetically dis-similar is irrelevant to the aggression or non-aggression of the offspring.
Unless evidence or a better reasoned (theoretical) genetic explanation can be provided, I will (broadly speaking) take statements that I quoted in my OP with quite a big pinch of salt.
I am not trying to start an argument, I am genuinely trying to acquire knowledge about bee strains, their genetics and their (inter) breeding.
Again, Thanks for the help, I do appreciate it, even if it can be a bit ... emotional sometimes