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Genome size as a marker for identifying the invasive alien taxa in Fallopia section Reynoutria / Jan Suda in Preslia, 82 (2010) 

Public Citation [article]  inPreslia > 82 (2010) . - 97-106 Titre : Genome size as a marker for identifying the invasive alien taxa in Fallopia section Reynoutria Type de document : Électronique Auteurs : Jan Suda ; Pavel Travnicek ; Brohumil Mandak ; Katterina Berchova-Bimova Année de publication : 2010 Article en page(s) : 97-106 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Fallopia Résumé : DAPI and propidium iodide flow cytometry were used to determine the variation in genome size in 166 samples and of all taxa and ploidy levels of Fallopia section Reynoutria (knotweeds) recorded in the Czech Republic. Significant differences were detected in the amount of nuclear DNA, associated with the ploidy levels and taxonomic identity of the material. At each ploidy level, F. sachalinensis showed the lowest and F. japonica the highest fluorescence intensities. The fluorescence values for the hybridogenous F. ×bohemica were located in-between these two levels. In most cases, there was at least a four-percent gap in fluorescence values between the nearest neighbours belonging to a different taxon. Intraspecific variation in genome size was very low in all taxa except hexaploid F. ×bohemica; this could be due to the complex evolutionary history of this taxon. Our results indicate that the amount of nuclear DNA can be used as a reliable marker for the identification of homoploid knotweed species and their hybrids. Different evolutionary pathways for the origin of high polyploids and/or hybridogenous taxa are proposed based on genome size. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142558 Suda, Jan, Travnicek, Pavel, Mandak, Brohumil, Berchova-Bimova, Katterina 2010 Genome size as a marker for identifying the invasive alien taxa in Fallopia section Reynoutria. Preslia, 82: 97-106.

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