Christie, I know the large fowl wheatens, blue wheatens, and lavenders were bred up from bantams by crossing them with large fowl. Bantam blood was also used in the brown reds.
To the best of my knowledge no bantam blood was used in at least some lines of silvers, blacks, blues, buffs, or whites. Perhaps John Blehm and others will chime in here, as they worked more with the large fowl than I. I did develop one line of silvers, blue silvers, a great line of whites that was lost after I let them go, and brown reds in large fowl. I networked with John on the brown reds and a number of varieties of bantams. Bob Walchak has also been a great help in some of the bantam varieties.