Out of curiosity when you're selecting you're breeders, how much diversity do you try and get in. Eg would it just be different lines within say German carnica or would you try to have Austrian or Slovenian lines also?
Lots.
No German lines here but we do have Austrian and are trialling Slovenian again after poor experiences in the past.
For our PRODUCTION queens we want as many lines as possible in the drone pool, so your queen comes from a specific line, but she is open mated to lots. We do drone saturate the area by having all our adjacent apiaries filled with good stock but cannot control what others place in the area.
We raise queens from a mix of our own best stock and from bought in lines. Jolanta has around 30 colonies, mostly unrelated, at the breeding unit, and they act as grafting mother, or starters and finishers. All throw drones into the pot as do an even larger number of colonies in adjacent apiaries.
If you are a dedicated breeder of a line then you will think this is a mess.....but the proof of the pudding is the results. It works and we have no issues with the 'aggressive crosses' nonsense.
So...if you buy a carnica queen from us it is going to be from one origin...usually our own,or a line from northern Italy that is very good, or Austria, but she will have mated to a variety of carnica stock, and probably with a bit of Amm and Buckfast thrown in. Makes for great brood patterns and rapid build up, but don't expect to do serious line breeding from the offspring, at least not until you have done some rigorous selection.
If you are not fussed and just let the offspring open mate they make good bees but we would not describe them as any special breed.