02197nas a2200205   4500008004100000022001400041245012100055210006900176260000900245300001100254490000600265520151900271100003201790700002301822700001801845700002801863700002501891700002501916856005001941       2015                        eng d  a1993-077100aKaryotype analysis and visualization of 45S rRNA genes using fluorescence in situ hybridization in aroids (Araceae).0 aKaryotype analysis and visualization of 45S rRNA genes using flu  c2015  a145-600 v93 a<p>Karyotype analysis and FISH mapping using 45S rDNA sequences on 6 economically important plant species Anthuriumandraeanum Linden ex Andr&eacute;, 1877, Monsteradeliciosa Liebmann, 1849, Philodendronscandens Koch &amp; Sello, 1853, Spathiphyllumwallisii Regel, 1877, Syngoniumauritum (Linnaeus, 1759) Schott, 1829 and Zantedeschiaelliottiana (Knight, 1890) Engler, 1915 within the monocotyledonous family Araceae (aroids) were performed. Chromosome numbers varied between 2n=2x=24 and 2n=2x=60 and the chromosome length varied between 15.77 &micro;m and 1.87 &micro;m. No correlation between chromosome numbers and genome sizes was observed for the studied genera. The chromosome formulas contained only metacentric and submetacentric chromosomes, except for Philodendronscandens in which also telocentric and subtelocentric chromosomes were observed. The highest degree of compaction was calculated for Spathiphyllumwallisii (66.49Mbp/&micro;m). B-chromosome-like structures were observed in Anthuriumandraeanum. Their measured size was 1.87 times smaller than the length of the shortest chromosome. After FISH experiments, two 45S rDNA sites were observed in 5 genera. Only in Zantedeschiaelliottiana, 4 sites were seen. Our results showed clear cytogenetic differences among genera within Araceae, and are the first molecular cytogenetics report for these genera. These chromosome data and molecular cytogenetic information are useful in aroid breeding programmes, systematics and evolutionary studies.</p>
1 aLakshmanan, Prabhu, Shankar1 aVan Laere, Katrijn1 aEeckhaut, Tom1 aVan Huylenbroeck, Johan1 aVan Bockstaele, Erik1 aKhrustaleva, Ludmila  uhttps://aroidsthailand.myspecies.info/node/18