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Nuclear DNA content variation within the genus Taraxacum (Asteraceae)
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SYSNO ASEP 0027287 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Nuclear DNA content variation within the genus Taraxacum (Asteraceae) Překlad názvu Rozdíly v obsahu nukleární DNK uvnitř r. Taraxacum (Asteraceae) Tvůrce(i) Záveský, L. (CZ)
Jarolímová, Vlasta (BU-J)
Štěpánek, Jan (BU-J) RID, ORCIDZdroj.dok. Folia Geobotanica. - : Springer - ISSN 1211-9520
Roč. 40, - (2005), s. 91-104Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova Taraxacum ; C-value ; genome size Vědní obor RIV EF - Botanika CEP GD206/03/H137 GA ČR - Grantová agentura ČR GA206/05/0970 GA ČR - Grantová agentura ČR CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000227755500009 Anotace Nuclear DNA content was estimated using flow cytometry in 13 sections represented by 18 species of the genus Taraxacum using propidium iodide as the DNA stain. Investigated plants represented diploid, triploid and tetraploid species from sections considered both primitive and advanced, i.e. Dioszegia, Piesis, Glacialia, Mongolica, Scariosa, Obovata, T. pyrenaicum group, T. sect. Coronata, Palustria, Taraxacum (= Crocea), Kashmirana, Ruderalia and Erythrosperma. Estimated nuclear 2C DNA content ranged from 1.74 pg in diploid T. linearisquameum (sect. Ruderalia) to 6.91 pg in tetraploid T. albidum (T. sect. Mongolica), demonstrating 3.97-fold variation. The lowest monoploid genome size 1Cx = 0.87 pg was recorded in T. linearisquameum (T. sect. Ruderalia) together with T. brachyglossum (T. sect. Erythrosperma), and the highest one (1.73 pg) was recorded in T. albidum (T. sect. Mongolica), giving 1.99-fold difference in the genus. No significant differences in genome size were observed within T. sect. Ruderalia, similarly no intraspecific variation was observed in T. paludosum (T. sect. Palustria) and T. serotinum (T. sect. Dioszegia). These results indicate a high intraspecific stability of the trait. Preliminary comparisons of genome size in species/sections considered to be close relatives were made. These data give a tentative additional evidence for the close phylogenetic relationship between sections Palustria and Piesis and against the close relationship between sections Piesis and Dioszegia. 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 2010
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