Počet záznamů: 1
Tragopogon porrifolius x T. pratensis: the present state of an old hybrid population in Central Bohemia, the Czech Republic
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SYSNO ASEP 0025623 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Tragopogon porrifolius x T. pratensis: the present state of an old hybrid population in Central Bohemia, the Czech Republic Překlad názvu Současný stav hybridogenní populace Tragopogon porrifolius × T. pratensis u Roudnice nad Labem ve středních Čechách Tvůrce(i) Krahulec, František (BU-J) RID, ORCID
Kaplan, Zdeněk (BU-J) RID, ORCID
Novák, J. (CZ)Zdroj.dok. Preslia. - : Česká botanická společnost - ISSN 0032-7786
Roč. 77, - (2005), s. 297-306Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova chromosome numbers ; DNA content ; distribution Vědní obor RIV EF - Botanika CEP GA206/02/0582 GA ČR - Grantová agentura ČR CEZ AV0Z60050516 - BU-J (2005-2011) Anotace The population of hybrid origin between Tragopogon porrifolius and T. pratensis (T. ×mirabilis), 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 perennials in contrast to monocarpic perennial (mostly biennial) parents. The distribution is described in detail; it shows the hybrid plants are spreading, at present even outside the town. Pracoviště Botanický ústav Kontakt Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Rok sběru 2006
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