・牝系図

Highway Code(牝 1939 Hyperion)

├ Courtesy (牝 1952 Nasrullah)

│├ Duplex (牝 1957 Double Jay)

││└ Double Mystery (牝 1967 Whodunit)

│├ Continue (牝 1958 Double Jay)

││├ Continuance (牝 1964 Round Table)

││├ Plane (牝 1966 Round Table)

││├ List (牡 1968 Herbager)

││├ Chain (牝 1969 Herbager)

││├ Tuerta (牝 1970 Forli)

││├ Continuation (牝 1971 Forli)

││├ Furling (牝 1973 Hoist the Flag)

││└ File (牝 1976 Tom Rolfe)

│├ Knightly Manner (牡 1961 Round Table)

│├ Respected (牝 1962 Round Table)

││└ Piaster (牡 1971 Damascus)

│├ Dignitas (牡 1965 Round Table)

│└ Makeacurtsey (牝 1967 Herbager)

│　├ Piney Ridge (牝 1974 Native Prince)

│　└ Civility (牝 1980 Shirley Heights)

└ Signal Hill (牝 1954 Hill Prince)

　└ Mount Zara (牝 1963 Zarathustra)

※牝系情報の勝利数はＪＲＡでのもの（1984年以降に生まれた馬で表示）。地方競馬のみを走った競走馬は「母馬名の生年」の形で表示しています