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The elusive Juncus minutulus: a failure to separate tetra- and hexaploid individuals of the Juncus bufonius complex in a morphometric comparison of cytometrically defined groups
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SYSNO ASEP 0370285 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The elusive Juncus minutulus: a failure to separate tetra- and hexaploid individuals of the Juncus bufonius complex in a morphometric comparison of cytometrically defined groups Author(s) Rooks, Frederick (BU-J)
Jarolímová, Vlasta (BU-J)
Záveská Drábková, Lenka (BU-J) RID
Kirschner, Jan (BU-J) RID, ORCID, SAINumber of authors 4 Source Title Preslia. - : Česká botanická společnost - ISSN 0032-7786
Roč. 83, č. 4 (2011), s. 565-589Number of pages 25 s. Language eng - English Country CZ - Czech Republic Keywords Juncus bufonius ; cytotypes ; discriminant analysis Subject RIV EF - Botanics R&D Projects GP206/07/P147 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000297230600004 Annotation Screening of nuclear genome size revealed, besides the diploid level corresponding to known diploid species, two polyploid cytotypes conforming with the 4x and 6x levels treated by some authors as Juncus minutulus and J. bufonius s. str. The relationship between nuclear DNA content and the number of chromosomes was verified by chromosome counting. The 2C values of diploid, tetraploid and hexaploid individuals were ca 0.65, 1.18±2.8% and 1.84±1.6% pg 2C DNA, respectively. Classificatory discriminant analysis using characters selected by canonical discriminant analysis and stepwise variable selection resulted in a validation error rate of 0.45 after cross-validation. This provides independent support for the opinion of some previous authors that J. bufonius L. is best treated as a single variable species comprising two cytotypes that are inseparable using hitherto suggested diagnostic characters. Workplace Institute of Botany Contact 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 Year of Publishing 2012
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