Fidelity, memetic

fidelity

from dawkins : copying-fidelity: the more faithful the copy, the more will remain of the initial pattern after several rounds of copying. If a painting is reproduced by making photocopies from photocopies, the underlying pattern will quickly become unrecognizable.

Producing high-quality unmutated copies. One of the big three meme properties as per dawkins (longevity, fidelity, fecundity).