hey Kelly, what a cool graphic!
I love those kinds of charts....the other breeders here know what a color-geek I am. And Jacque mentioned Helene a fabulous wealth of knowledge about genetics. She's great! She was the first one I knew of naming the "dilute" (d) gene, which is what turns blacks to blue or silver, and also turns the browns to silver-beige or cafe au lait. And while I couldn't know, I would guess that there are MILLIONS of dogs (poodles) that started out black or brown and because they took a while to mature and for their color to dilute, they were registered as a flat black or brown, not allowing for that color change. I think I would have to respectfully stipulate that blues CAN occur more commonly in f1b doodles, since there are poodle genes on both sides of those 2nd gen. puppies. And I think that as more of them are seen that they will be HIGHLY admired in the dodole world, just as beautiful blue poodles have been sought out at different times.
My website has pictures of puppies that are in the process of going towards the "blue" color, if anyone wants to see it. Just go to the PUPPIES page and you'll see some of them are really black and some just don't see as black but turning more of a gray on the muzzle and around the eyes, which is classically where it starts on a poodle.
Oh, we own a really sweet blue poodle, and she's on my site too. And yeah, her breeder/owner registered her as BLACK! :wink: go figure!