Occurrence of tetraploid and octoploid cytotypes in Senecio jacobaea ssp. jacobaea (Asteraceae) in Pannonia and the Carpathians

Hodálová, Iva; Grulich, Vít; Horová, Lucie; Valachovič, Milan; Marhold, Karol

doi:10.1111/j.1095-8339.2007.00605.x

Cited by 25 publications

(25 citation statements)

References 15 publications

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“…The near absence of diploid P. bertolonii in the Romanian part of the Eastern and Southern Carpathians is of particular interest. A similar cytogeographic pattern was observed by Hodálová et al. (2007) where tetraploids and octoploids of Senecio jacobaea co‐occur in the Pannonian lowland and adjacent parts of the Western Carpathians, while octoploids are lacking in the Eastern and Southern Carpathians.…”

Section: Discussionsupporting

confidence: 77%

Cytogeography of thePhleum pratensegroup (Poaceae) in the Carpathians and Pannonia

Perný¹,

Kolarčik²,

Majeský³

et al. 2008

Botanical Journal of the Linnean Society

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Cytogeographical variability within the Phleum pratense group in the Carpathians and adjacent part of Pannonian lowland, based on 132 populations analysed by flow cytometry, is described. Only diploid and hexaploid plants were detected among 635 samples from the studied area. Diploids were found to be less frequent (127 plants, 20%) than hexaploids (508, 80%). With the exception of the single pure diploid population, diploids always co-occured with hexaploids (30 localities, 22.7%). The majority of populations (101, 76.5%) consisted of hexaploid plants. Most mixed populations occur in the Western Carpathians (26). In the Eastern Carpathians, mixed populations are much rarer, with three populations in Ukraine and one in Romania. In the Southern Carpathians, only hexaploids occur. The conventional taxonomic concept of the two species, diploid P. bertolonii and hexaploid P. pratense, was followed in spite of their sympatric occurence. Distribution maps based on chromosome number data from previous studies and on ploidy level estimates are given for both species in the studied area. The pattern of different distribution of the two taxa within the Carpathians is discussed.

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Section: Discussionsupporting

confidence: 77%

Cytogeography of thePhleum pratensegroup (Poaceae) in the Carpathians and Pannonia

Perný¹,

Kolarčik²,

Majeský³

et al. 2008

Botanical Journal of the Linnean Society

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“…Similar cases, where morphological differentiation or at least tendencies among different cytotypes were inferred at the level of populations, but failed to distinguish them at the level of individuals, were reported also in other plant groups (e.g. Senecio jacobea, Hodálová et al 2007;Cardamine pratensis, Lihová et al 2003;Marhold 1996).…”

Section: Morphological Differentiation Between the Cytotypesmentioning

confidence: 55%

“…In Senecio jacobaea subsp. jacobaea where only minor morphological differences between tetraploids and octoploids at the level of populations were found, cytotypes were not taxonomically classified either, also because of the lack of geographical or ecological differentiation (Hodálová et al 2007). Similar taxonomic conclusions when cytotypes remained unclassified because of insufficient differentiation in morphology, ecology, phenology and/or distribution were adopted, e.g.…”

Section: Taxonomic Treatment Of Different Cytotypesmentioning

confidence: 99%

Diploid and Tetraploid Cytotypes of Centaurea stoebe (Asteraceae) in Central Europe: Morphological Differentiation and Cytotype Distribution Patterns

et al. 2008

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The taxomically critical species Centaurea stoebe is represented in Central Europe by a diploid (2n=18) and a tetraploid (2n=36) cytotype. Their morphological differentiation and taxonomic treatment is still controversial. Karyological (chromosome numbers and flow cytometric measurements) and multivariate morphometric analyses were used here to address cytotype distribution patterns and their morphological differentiation. Material from 38 localities (771 individuals) in Slovakia, Hungary and Austria, including type localities of the names traditionally applied to the different cytotypes, was sampled and evaluated using both morphometric and karyological approaches. The morphological tendency towards cytotype differentiation is evident only at a population level, and is blurred at the level of individual plants. Diploid populations prevail in the area studied, as well as throughout Europe; mixed-cytotype populations were also found. The present data, namely the weak morphological distinction, largely sympatric occurrence of the cytotypes, and the existence of mixed-cytotype populations, favour taxonomic treatment as a single species, without recognition of infraspecific units.

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“…They range from near cytological homogeneity ( Vicia cracca , Trávníček, Eliášová & Suda, ; Alyssum montanum , Španiel et al ., ) through the absence of geographical patterns and extensive intrapopulation cytotype mixture ( Phleum pratense agg. ; Perný et al ., ) to a relatively strong altitudinal differentiation ( Sesleria calcarea – S. tatrae species complex, Lysak & Doležel, ; Senecio jacobaea , Hodálová et al ., ; Pilosella officinarum , Mráz et al ., ; Knautia arvensis agg., Kolář et al ., ). However, none of these studied species spans the entire altitudinal range of habitats.…”

Section: Introductionmentioning

confidence: 99%

Ecological segregation does not drive the intricate parapatric distribution of diploid and tetraploid cytotypes of theArabidopsis arenosagroup (Brassicaceae)

Kolář

Lučanová

Záveská

et al. 2015

Biol. J. Linn. Soc.

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Detailed knowledge of the geographic distribution of cytotypes is a prerequisite for any experimental or molecular study of ploidy-variable plant systems. The Arabidopsis arenosa group, an intricate di-tetraploid complex from the plant model genus Arabidopsis, has remained largely neglected regarding the distribution and habitat associations of its cytotypes. Using flow cytometry, we conducted a large population-level cytological screen across the A. arenosa group range, involving more than 2900 individuals from 194 populations. We characterized a largely parapatric distribution of the diploid (Southeast Europe) and tetraploid (Northwest Europe) cytotypes with two contact zones -a narrow contact zone in the Slovenian Forealps and a diffuse contact zone across the Carpathians. In addition, a previously unknown isolated diploid lineage with distinct ecology was revealed from sandy areas of the southeastern Baltic coast. We also recorded several adult triploid individuals for the first time in wild Arabidopsis arenosa. Particularly in the Western Carpathians, the diploid and tetraploid populations are largely intermingled, and both cytotypes are spread along the whole lowland-alpine gradient of habitats, exhibiting no signs of ploidy-linked habitat differentiation. In contrast with the complexity at the landscape scale, the within-population cytological homogeneity and the rare occurrence of triploids indicate that the contact zone is rather stable.

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Occurrence of tetraploid and octoploid cytotypes in Senecio jacobaea ssp. jacobaea (Asteraceae) in Pannonia and the Carpathians

Cited by 25 publications

References 15 publications

Cytogeography of thePhleum pratensegroup (Poaceae) in the Carpathians and Pannonia

Cytogeography of thePhleum pratensegroup (Poaceae) in the Carpathians and Pannonia

Diploid and Tetraploid Cytotypes of Centaurea stoebe (Asteraceae) in Central Europe: Morphological Differentiation and Cytotype Distribution Patterns

Ecological segregation does not drive the intricate parapatric distribution of diploid and tetraploid cytotypes of theArabidopsis arenosagroup (Brassicaceae)

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