. . "-" . "Tragopogon porrifolius x T. pratensis: the present state of an old hybrid population in Central Bohemia, the Czech Republic"@en . "The population of hybrid origin between Tragopogon porrifolius and T. pratensis (T. \u00D7mirabilis), which occurs in SW part of the town of Roudnice na Labem, N part of Central Bohemia, was analysed with respect to its morphology, fertility, life history, ploidy level and DNA content. Both parental species show relatively narrow morphological variation; they are biennials (monocarpic perennials), diploids. T. pratensis is a native species in the Czech Republic, T. porrifolius was cultivated there in the past. The plants of the hybrid population are extremely morphologically variable, with variation ranges of some characters overlapping that of parental species (e.g., ligules are often longer than involucral bracts, peduncles are often lanate). Only diploids were found within the hybrid population; however, they have substantially lower DNA content than both parents (18% lower than T. pratensis, 42% lower than T. porrifolius). The plants of the Roudnice hybrid population are polycarpic p..."@en . . "Krahulec, Franti\u0161ek" . . . "[A90EA040D2D1]" . . "CZ - \u010Cesk\u00E1 republika" . . "3"^^ . . "Tragopogon porrifolius x T. pratensis: the present state of an old hybrid population in Central Bohemia, the Czech Republic" . . . "Sou\u010Dasn\u00FD stav hybridogenn\u00ED populace Tragopogon porrifolius \u00D7 T. pratensis u Roudnice nad Labem ve st\u0159edn\u00EDch \u010Cech\u00E1ch"@cs . "0032-7786" . . "Kaplan, Zden\u011Bk" . "Preslia" . "2"^^ . "chromosome numbers; DNA content; distribution"@en . "RIV/67985939:_____/05:00025623!RIV06-AV0-67985939" . . "P(GA206/02/0582), Z(AV0Z60050516)" . . "10"^^ . "Tragopogon porrifolius x T. pratensis: the present state of an old hybrid population in Central Bohemia, the Czech Republic" . . "547022" . "77" . . "Sou\u010Dasn\u00FD stav hybridogenn\u00ED populace Tragopogon porrifolius \u00D7 T. pratensis u Roudnice nad Labem ve st\u0159edn\u00EDch \u010Cech\u00E1ch"@cs . "RIV/67985939:_____/05:00025623" . "297;306" . "V roce 1922 popsal F.A.Nov\u00E1k vznik k\u0159\u00ED\u017Eence mezi druhy Tragopogon porrifolius a T. pratensis (T. \u00D7mirabilis) v zahrad\u011B zem\u011Bd\u011Blsk\u00E9 \u0161koly v Roudnici nad Labem. P\u0159esto\u017Ee byly tento hybrid i lokalita zm\u00EDn\u011Bny ve v\u0161ech d\u016Fle\u017Eit\u00FDch ur\u010Dovac\u00EDch p\u0159\u00EDru\u010Dk\u00E1ch, nikdo dal\u0161\u00ED tento p\u0159\u00EDpad hybridizace nestudoval. V sou\u010Dasn\u00E9 dob\u011B se na m\u00EDst\u011B b\u00FDval\u00E9 zahrady nach\u00E1z\u00ED objekt podniku Ross (d\u0159\u00EDve Roudnick\u00E9 stroj\u00EDrny). V jeho are\u00E1lu stejn\u011B jako v are\u00E1lu \u017Eelezni\u010Dn\u00ED stanice Roudnice-Hracholusky a v p\u0159ilehl\u00FDch ulic\u00EDch roste velk\u00E1 populace hybridn\u00EDch koz\u00EDch brad. Ty se li\u0161\u00ED cel\u00FDm souborem znak\u016F od sv\u00FDch rodi\u010D\u016F, v n\u011Bkter\u00FDch p\u0159\u00EDpadech jsou i mimo rozsah variability obou rodi\u010D\u016F. Celkov\u011B je variabilita t\u00E9to populace velmi vysok\u00E1, a to nejen v morfologick\u00FDch znac\u00EDch, ale nap\u0159. i ve form\u011B vzr\u016Fstu rostlin, kde se vyskytuj\u00ED jak vysok\u00E9 (a\u017E 1,5 m) rostliny, tak i n\u00EDzk\u00E9 rostliny s vystoupav\u00FDmi stonky. Za nejzaj\u00EDmav\u011Bj\u0161\u00ED skute\u010Dnost pova\u017Eujeme to, \u017Ee a\u010D oba rodi\u010De jsou kr\u00E1tkov\u011Bk\u00E9 trvalky kvetouc\u00ED jednou za \u017Eivot, tak hybridn\u00ED ..."@cs . . "Tragopogon porrifolius x T. pratensis: the present state of an old hybrid population in Central Bohemia, the Czech Republic"@en . . "The population of hybrid origin between Tragopogon porrifolius and T. pratensis (T. \u00D7mirabilis), which occurs in SW part of the town of Roudnice na Labem, N part of Central Bohemia, was analysed with respect to its morphology, fertility, life history, ploidy level and DNA content. Both parental species show relatively narrow morphological variation; they are biennials (monocarpic perennials), diploids. T. pratensis is a native species in the Czech Republic, T. porrifolius was cultivated there in the past. The plants of the hybrid population are extremely morphologically variable, with variation ranges of some characters overlapping that of parental species (e.g., ligules are often longer than involucral bracts, peduncles are often lanate). Only diploids were found within the hybrid population; however, they have substantially lower DNA content than both parents (18% lower than T. pratensis, 42% lower than T. porrifolius). The plants of the Roudnice hybrid population are polycarpic p..." . . "Nov\u00E1k, J." .