ペティション系（ペティションけい、）は、馬（主にサラブレッド）の父系（父方の系図）のひとつ。
サイアーライン
Darley Arabian 1700 Bartlet's Childers 1716 Squirt 1732 Marske 1750 Eclipse 1764 ---←エクリプス系へ戻る Potoooooooo 1773 Waxy 1790 Whalebone 1807 Sir Hercules 1826 Birdcatcher 1833 The Baron 1842 Stockwell 1849 Doncaster 1870 Bend Or 1877 Bona Vista 1889 Cyllene 1895 Polymelus 1902 Phalaris 1913 ---←ファラリス系へ戻る Fairway 1925 ---←フェアウェイ系へ戻る Fair Trial 1932 ---←フェアトライアル系へ戻る Petition 1944 ---↓ペティション系（改行）
---↓ペティション系---
Petition 1944 March Past 1950 Don't Look 1957 Bury Hill 1958 Queen's Hussar 1960 →Highclere 1971 Seventh Hussar 1966 Rego Hussar 1972 Always Welcome 1973 Regimental Honour 1975 Top Hussar 1978 Shiny Tenth 1967 Brigadier Gerard 1968 Etienne Gerard 1974 Mont Thabor 1978 General 1974 Stonewall 1980 Lord at War 1980 →John's Call 1991 Lord Hailey 1987 Lord Excel 1997 Lord Amigo 2006 Must be War 1989 Must Be Fair 2003 Storm's Close 2015 Patton 1991 Bohamian Butler 1999 Lord of Warriors 1995 Lasting Legacy 1997 Mighty 1997 Act of War 1998 Lasting Tribute 1998 Honor in War 1999 Imperial Guard 1974 Admirals Launch 1975 Lord Byron 1981 Kayak 1996 Cuentas Claras 1983 Cuentas Largas 1993 El Morocho 2004 Enojado 1983 Zidane 2000 Mount Royal 1989 Imparcial 2002 Car Mount 2007 Brigade of Guards 1975 Taxiarchos 1975 Palace Dancer 1976 R B Chesne 1976 Apeldoorn 1982 Perim 1993 Sweet Chesne 1985 Karashaan 1977 Light Cavarly 1977 Vilas Light 1989 Brillant Light 1998 Junta 1978 Vayrann 1978 Geral 1979 White Spade 1980 Silverbulletknight 1999 Roman Raider 1981 Comrade In Arms 1982 Celtic Arms 1991 Malone 1998 River Cafe 1982 King Top 1969 Fife and Drum 1974 Private Line 1975 Federico 1983 El Motivo 2001 Bozovici 1977 Church Parade 1978 Retained 1967 Camouflage 1968 Dawn Review 1969 Roy Bridge 1969 Sousa 1973 King's Composer 1992 Propitiation 1950 Coronation Year 1951 Le Dieu d'Or 1952 Goldhill 1961 Golden Mallard 1968 Gold Form 1969 High Award 1971 Hopeful Affair 1972 Goldhills Pride 1974 Pit Boss 1953 Coasting 1955 Day Court 1955 Sum Up 1962 Court Road 1966 Tarasco 1976 Girospe 1985 Pandour 1955 Baryulah 1974 Bochum 1977 Sir Witten 1986 Ironic 1957 Negotiation 1957 Zouave 1958 Hodell 1959 Experte 1969 Nandino 1980 Mandamus 1960 Mr. Bigmore 1972 Mandalus 1974 Tullibards Beetman 1990 Runnymede 1961 The Go Between 1970 Vorvados 1977 Akvarium 1989 Charter Day 1971 *ホワイトファイア 1962 Coup de Feu 1969 Clever Coup 1978 My Swanee 1963 French Swanee 1973 *ペトロス 1964 Pettyless 1965 Petingo 1965 Ifni 1970 Nelite 1979 *サティンゴ 1970 レオティンゴ 1982 Pirgos 1970 Pitskelly 1970 Tood 1985 Bellissimo 1971 Bellingo 1986 *イングリッシュプリンス 1971 →Sun Princess 1980 Prince Ragusa 1981 *ピットカーン 1971 Ela-Mana-Mou 1976 Sumayr 1982 Almaarad 1983 Natski 1984 Natski's Native 1991 Shahdji 1984 Emmson 1985 Groove 1992 Heavenly Manna 1985 Snurge 1987 Rhodesian Winner 1999 Double Trigger 1991 Double Eclipse 1992 O'Connor 1992 Lucky Look 1976 カネクロシオ 1980 シーハリアースタン 1980 ピットヒヤク 1991 Tingo 1971 Titer 1987 Three Legs 1972 →Horlicks 1983 Jolly Jake 1981 Random Chance 1982 Random Choice 1990 Shannon 1983 Glenbrook 1991 Patris 1973 Perplejo 1982 Diligo 1974 Egmont 1974 Petronisi 1974 Jimmy Who 1975 Wastin 1984 *ソルティンゴ 1975 イブキラーゼン 1981 スズパレード 1981 *ヴァリィフォージュ 1975 チュニカオー 1985 Casino Royale 1975 Forties Field 1975 Major Petingo 1975 *パーシィコ 1976 *サンディクリーク 1976 Hill's Forecast 1976 Troy 1976 →Helen Street 1982 Ilium 1981 B. G. Aquisition 1988 Trojan Fen 1981 Northern Trojan 1987 Tropular 1981 Ragmar 1993 Trojan Fort 1983 War Hero 1983 *ダイナゴー 1977 Joberan 1977 John Florestan 1966 Joselo 1973 Renovador 1979 Lance 1987
サイアーライン上は種牡馬もしくは種牡馬入りを表明した馬。