Genetic diversity of a relict plant species, Ligularia sibirica (L.) Cass. (Asteraceae)

Šmídová, Anna; Münzbergová, Zuzana; Plačková, Ivana

doi:10.1016/j.flora.2010.03.003

Cited by 33 publications

(19 citation statements)

References 41 publications

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“…The range in the proportion of polymorphic loci (4-62 %) is comparable with the variation in polymorphic loci found in other European glacial relict species: 12-54 % in Saxifraga paniculata (Reisch et al 2003), 28-60 % in Draba aizoides (Müller 2006) and 72-92 % in Biscutella laevigata (Dannemann 2000). Furthermore, similar high genetic diversity as found in the present study has been reported in other relict species (Pérez-Collazos and Catalan 2007;Garzia-Gonzàles et al 2008;Smidová et al 2011). In our study, genetic diversity was significantly lower in smaller populations than in larger ones (Fig.…”

Section: Discussionsupporting

confidence: 92%

“…3). This finding supports the general positive relationship between population size and genetic diversity reported in numerous plant species (Fischer and Matthies 1998;Hensen et al 2005;Smidová et al 2011). The low genetic diversity recorded in small A. montanum populations could be a result of genetic drift, inbreeding depression, lack of pollinators and/or poor habitat quality (Avise and Hamrick 1996;Young and Clarke 2001;Hardy et al 2006).…”

Section: Discussionsupporting

confidence: 76%

“…The within-population molecular variability detected in A. montanum populations (53 %) was relatively low compared with those found within populations of several other relict plant species: 71.9 % in Ramonda myconi (Dubreuil et al 2008) and[80 % in Stipa capilatta, Physaria bellii and Ligularia sibirica (Hensen et al 2005;Kothera and Richards 2007;Smidová et al 2011). However, such low withinpopulation genetic variability is typical for self-compatible species and species with the ability for clonal growth (Peterson et al 2008).…”

Section: Discussionmentioning

confidence: 87%

“…Population size in relict plant species is in most cases highly variable. For example, the population size ranged from 4 to 370 individuals in Draba aizoides, from 1 to 150 in Saxifraga paniculata (Wezel 2007), from 26 to 257 in relict Biscutella laevigata populations (Dannemann 2000), from 60 to 5,000 in the alpine relict Saxifraga cernua (Bauert et al 2007) and from 85 to 28,000 in the relict Ligularia sibirica (Smidová et al 2011). The population sizes recorded for A. montanum (8-248 individuals) in our study are in the range of these estimates.…”

Section: Discussionmentioning

confidence: 99%

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Population structure and genetic diversity of relict populations of Alyssum montanum on limestone cliffs in the Northern Swiss Jura mountains

2012

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Exposed cliffs in the Northern Swiss Jura mountains harbour a highly diverse flora with numerous rare and relict plant species. The genetic structure of cliff populations is of particular interest because in a variety of plant species the populations are small, isolated and separated from their main distribution area in the Alps and the Mediterranean. We examined possible relationships between population size and size structure, sexual reproduction and genetic diversity of Alyssum montanum, a relict plant species occurring on limestone cliffs in the Northern Swiss Jura mountains. The population size of A. montanum ranged from 8 to 248 plant individuals on the 12 cliffs examined. Most populations contained a high proportion of small-sized (=young) plants indicating a successful establishment of seedlings. Fitness-related traits of A. montanum (percentage of reproductive individuals, number of fruits, fruit weight) varied widely between cliffs and were neither related to the size of the populations nor to the percentage of vegetation cover on the cliffs. RAPD-PCR analysis revealed that A. montanum populations exhibit a remarkably high genetic diversity. However, genetic diversity decreased with decreasing population size. Moreover, the positive relationship found between genetic variability and fitnessrelated traits indicates that population size is a key factor for the persistence of A. montanum on limestone cliffs.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

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Population structure and genetic diversity of relict populations of Alyssum montanum on limestone cliffs in the Northern Swiss Jura mountains

2012

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“…Furthermore, reduced gene flow among isolated populations in fragmented habitats has led to strong genetic differentiation between populations of many rare species (e.g. Fischer and Matthies 1998;Š mídová et al 2011;Wagner et al 2011). Loss of genetic variation and genetic differentiation is expected to increase with time since fragmentation (Coates 1988;Gitzendanner and Soltis 2000;Zawko et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Genetic structure of Saxifraga rosacea subsp. sponhemica, a rare endemic rock plant of Central Europe

et al. 2014

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We used RAPD markers to study the population genetic structure and diversity of Saxifraga rosacea subsp. sponhemica, a rare Central European endemic rock plant with a highly disjunct distribution. Because of strong isolation current gene flow between populations is very low or absent. However, an isolation by distance pattern of genetic differentiation suggested historical gene flow during the last glaciation when suitable habitats for S. sponhemica were much more abundant. In most populations, considerable genetic variability has been preserved due to the longevity of S. sponhemica. Our results suggest that long-lived plant species can maintain historic genetic patterns despite small size and strong isolation of populations. Several RAPD loci were identified to be non-neutral and their frequencies correlated with climatic gradients, indicating natural selection. Adaptive genetic variation could be important for adaptation to environmental changes like ongoing climate change. The taxon does not appear to be genetically threatened in the short term, but populations are threatened by habitat destruction. The establishment of new populations in suitable habitats with seeds from the same region may be a suitable conservation measure avoiding potential maladaptation due to local adaptation.

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No obvious genetic erosion, but evident relict status at the westernmost range edge of the Pontic‐Pannonian steppe plant Linum flavum L. (Linaceae) in Central Europe

Plenk

Bardy

Höhn

et al. 2017

Ecology and Evolution

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We investigate patterns of genetic variation along an east–west transect of Central European populations of Linum flavum and interpret the Quaternary history of its peripheral populations, especially those at the westernmost isolated range edge, discussing their migrations and possible relict status. We defined our peripheral transect across three study regions from Central Hungary, eastern Austria to southwestern Germany. Using AFLP fingerprinting and cpDNA sequence variation (rpL16 intron, atpI‐H), we analyzed 267 and 95 individuals, respectively, representing each study region by four populations. Hierarchical AMOVA (AFLPs) indicated significant variation among study regions (12% of total variance) and moderate differentiation between populations (10%). Population differentiation was high at the westernmost range edge (11.5%, Germany), but also in the east (13.4%, Hungary), compared to the Austrian study region (8.6%). Correspondingly, AFLP diversity was highest in the center of the study transect in eastern Austria. CpDNA haplotypes support a pattern of regional structuring with the strongest separation of the westernmost range edge, and some haplotype sharing among Austrian and Hungarian individuals. Equilibrating nucleotide versus haplotype diversity patterns, the highly diverse populations at the Pannonian range edge (Austria) indicate long‐term persistence, while Central Pannonian populations are obviously effected by recent bottlenecks. Intermediate nucleotide, but high haplotype diversity within the westernmost exclave (Swabian Alb), is indicative of a founder bottleneck during its pre‐LGM or early postglacial migration history, followed by sufficient time to accumulate cpDNA variation. The not obviously reduced genetic diversity and distinctiveness of L. flavum at the westernmost range edge suggest a long‐term persistence (relict status) of populations in this region, where the species has survived probably even the Würm glaciation in extra‐Mediterranean refugia. This genetic relict variation represents an important part of the overall genetic diversity found in the western periphery of this steppe plant and highlights the high conservation priority of respective gene pools.

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Genetic diversity of a relict plant species, Ligularia sibirica (L.) Cass. (Asteraceae)

Cited by 33 publications

References 41 publications

Population structure and genetic diversity of relict populations of Alyssum montanum on limestone cliffs in the Northern Swiss Jura mountains

Population structure and genetic diversity of relict populations of Alyssum montanum on limestone cliffs in the Northern Swiss Jura mountains

Genetic structure of Saxifraga rosacea subsp. sponhemica, a rare endemic rock plant of Central Europe

No obvious genetic erosion, but evident relict status at the westernmost range edge of the Pontic‐Pannonian steppe plant Linum flavum L. (Linaceae) in Central Europe

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