Blue Banner (牝 1952 鹿毛 War Admiral)
 `-- Key Bridge (牝 1959 鹿毛 Princequillo)
     |-- Seven Locks (牝 1968 鹿毛 Jacinto)
     |   |-- Ahrex (牝 1975 栗毛 Dr. Fager)
     |   `-- Seven Arts (牝 1977 栗毛 Arts and Letters)
     |-- Key to the Mint (牡 1969 鹿毛 Graustark)
     |-- Key to the Kingdom (牡 1970 黒鹿毛 Bold Ruler)
     |-- Key Link (牝 1971 黒鹿毛 Bold Ruler)
     |   `-- Key to the Edge (牝 1984 黒鹿毛 Sharpen Up)
     |-- Key to The Heart (牝 1972 鹿毛 Arts and Letters)
     |   `-- Magic Square (牝 1976 鹿毛 Quadrangle)
     |-- Dumbarton Oaks (牝 1973 鹿毛 Arts and Letters)
     |   `-- Chain Bridge (牝 1979 Bold Bidder)
     |-- Gliding By (牝 1975 鹿毛 Tom Rolfe)
     |   |-- Early Rising (牝 1980 芦毛 Grey Dawn)
     |   |-- Clare Bridge (牝 1981 栗毛 Little Current)
     |   |-- Crooning Water (牝 1982 鹿毛 Riva Ridge)
     |   `-- ダンシンググラス Dancing Grass [米] (牝 1987 鹿毛 Northern Dancer)
     |-- Gliding By I (牝 1975 鹿毛 Tom Rolfe)
     |   `-- Susquehanna Days (牝 1990 鹿毛 Chief's Crown)
     `-- Key to Content (牡 1977 鹿毛 Forli)