Unfortunately, Barred is fleeting...

She'll moult out of most of it, only retaining it on her chest and under the wings. Very few Barred keep the whole body markings.
No, I can't say I can take credit for it, this year. I started with three hens and one drake, saw him mating all of them, they all went broody, and not a single egg hatched. He shot blanks. So I started getting more Muscovy. And then more. And more. Thus why I call myself a Muscovy Hoarder!
I do plan on breeding for specific colours next year, though. I've got one last set of ducklings to grow out, and then I'll start making charts (and probably changing them about a hundred times!) to figure out the best pairings.