Queen rearing

[MEdmonson]

When a person buys a commercial queen and raises more queens from her brood, do the new queens inherit the good qualities i.e. egg laying?

[Finsky]

Yes, I have done that 40 years. First generation has good features quite well in second generation features features spread too much.

When you take 2. generation, queen has only 25% it's original genes.

It depends, what you have in your surrounding = who are those 10-16 drones. Workes are quite a big mix from different origin and so second generation of queens are different.

[Brian D. Bray]

To maximize the queen qualities it really requires isolation.  A place that is far from the madding crowd and all the hives have the same source of queens.  Then it is 90%(?) sure of mating with drones from the same stock, carrying on the desired traits.