Two additions to the &lt;i&gt;Jacea-Lepteranthus&lt;/i&gt; complex: parallel adaptation in the enigmatic species &lt;i&gt;Centaurea subtilis&lt;/i&gt; and &lt;i&gt;C. exarata&lt;/i&gt;

Hilpold, Andreas; Garcia‐Jacas, Núria; Vilatersana, Roser; Serna, Alfonso Susanna de la

doi:10.3989/collectbot.2008.v28.003

Cited by 4 publications

(9 citation statements)

References 16 publications

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“…The suitability of retaining sect. Nigrescentes as an independent group will be addressed in future studies on the basis of new molecular evidence; however, as was demonstrated in previous studies of Centaurea, the number of sections in Dostál's revision was inflated (Garcia-Jacas & al, 2006;Mameli, 2008;Hilpold & al., 2009). antennata, C. caballeroi, and C. linifolia as a single species on account of their morphological similarity (Bolòs & Vigo, 1996).…”

Section: Induratamentioning

confidence: 94%

The limitations of molecular markers in phylogenetic reconstruction: The case of Centaurea sect. Phrygia (Compositae)

López‐Alvarado

Sáez

Filigheddu

et al. 2014

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In this paper we seek to elucidate the phylogeny of Centaurea sect. Jacea and sect. Phrygia (= sect. Lepteranthus nom. inval.) which have long been a source of controversy. A molecular phylogenetic approach is used based on nrDNA and plastid markers. The study confirmed incongruence between datasets, which can be explained both by hybridization and the occurrence of shared ancestral polymorphisms. Both factors are critical in limiting the resolution of phylogenetic trees. Despite this, we provide an interpretation of the current European distribution of sect. Phrygia, and suggest a probable eastern center of origin for the section. Our results support previous studies in Centaurea, suggesting on molecular grounds that sect. Phrygia and sect. Jacea can not be clearly separated, particularly when C. nigra s.l. or C. jacea s.l. coexist with other taxa of sect. Phrygia and sect. Jacea.

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Section: Induratamentioning

confidence: 94%

The limitations of molecular markers in phylogenetic reconstruction: The case of Centaurea sect. Phrygia (Compositae)

López‐Alvarado

Sáez

Filigheddu

et al. 2014

TAXON

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“…Centaurea subtilis Bertol. was not included, as it belongs to the Jacea-Lepteranthus clade (Hilpold & al., 2009) rather than to the C. cineraria group. Voucher specimens were determined based on Pottier-Alapetite (1981), Pignatti (1982), Breitwieser & Podlech (1986), Turland & Chilton (2000), Arrigoni (2003), and .…”

Section: Methodsmentioning

confidence: 99%

“…Phalolepis and sect. Willkommia to create the molecularly defined, monophyletic "Acrolophus subgroup" of the "Jacea group" (Garcia-Jacas & al., 2006;Suárez-Santiago & al., 2007b;Hilpold & al., 2009). The Jacea group was suggested to have originated in the late Miocene in the eastern Mediterranean (Suárez-Santiago & al., 2007b).…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, gravity appears to be the only mechanism of seed dispersal (Bancheva, unpub.). In C. corymbosa Pourr., a close relative of the C. cineraria group (Hilpold & al., 2009), the average seed dispersal distance was only 32 cm (Colas & al., 1997;Hardy & al., 2004). Pollination is mainly carried out by insects (Cela-Renzoni & Viegi, 1982) and reproduction is mostly sexual, but facultative apospory was reported in C. cineraria, C. gymnocarpa and C. panormitana (Cela-Renzoni & Viegi, 1982).…”

Section: Introductionmentioning

confidence: 99%

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Evolution of the central Mediterranean Centaurea cineraria group (Asteraceae): Evidence for relatively recent, allopatric diversification following transoceanic seed dispersal

Hilpold

Schönswetter

Susanna

et al. 2011

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We explored the spatiotemporal diversification of the Centaurea cineraria group based on AFLP fingerprints and plastid DNA sequences applied to a broad sampling of Central Mediterranean taxa of the Acrolophus subgroup. Despite its morphological distinctness, monophyly of the C. cineraria group was not supported by our data. A distinct lineage mostly re ‐ stricted to Sicily (the Sicily group) comprised some members of the C. cineraria group but also included C. parlatoris, assumed to be a member of the C. dissecta group. The relationships of the Sicily group with other members of the Acrolophus subgroup could not be clarified. Molecular dating supported recent, presumably allopatric diversification whose onset dates back to less than 250,000 years within the Sicily group. Tunisia, the Aeolian Islands and the Island Ventotene in the central Tyrrhenian Sea were likely colonised from Sicily. The young age of diversification within the Sicily group rejects land bridges between Africa and Sicily, which were only available during significantly older periods, in favour of transoceanic seed dispersal. Dispersal might have been favoured by low sea levels during cold stages of the Pleistocene. The molecular data indicate that taxonomy of the C. cineraria group needs to be revised..

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“…Several authors have argued that the rate of formation of fertile/viable hybrids between distantly related species should be lower than that between more closely related species (Schranz et al 2005). Centaurea horrida and C. filiformis belong to the Acrolophus subgroup of the genus (Susanna and Garcia-Jacas 2007;Hilpold et al 2009). According to Suárez-Santiago et al (2007a), its distribution is mainly restricted to the two ends of the Mediterranean Basin, with a group of species restricted to the western Mediterranean (species of the section Willkommia and several taxa of the Acrolophus-Phalolepis complex), and another group in the eastern Mediterranean (species of the Acrolophus-Phalolepis complex).…”

Section: Hybridization Between Sardinian Centaurea Species In the Evomentioning

confidence: 99%

A Natural Homoploid Hybrid between Centaurea horrida and Centaurea filiformis (Asteraceae) as Revealed by Morphological and Genetic Traits

et al. 2010

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Studies over the last two decades demonstrate that hybridization has played an integral role in the evolution of several sections of the genus Centaurea. Nevertheless, natural hybridization between narrow Mediterranean endemic Centaurea species has not been documented as yet. A population of fertile Centaurea individuals exhibiting intermediate morphological traits between two Sardinian narrow endemics, C. horrida and C. filiformis, was identified at the Tavolara Islet (Sardinia, Italy). Intermediate leaf length and head width characterized this population, suggesting its hybrid origin. The putative hybrid population was structured (i.e., composed of seedlings, saplings and adult individuals) and had a relatively high levels of seed production. The number of chromosomes was identical to that of the proposed progenitors (2n=18). Genotyping at five microsatellite loci showed that the putative hybrid possessed several alleles in common with the proposed parental species and intermediate values of genetic differentiation, as indicated by both F ST and R ST, between C. horrida and C. filiformis. We therefore conclude that the studied intermediate population is of hybrid origin, and discuss possible mechanisms of its reproductive isolation from the parental species, potential re-introgression, and evolutionary implications of this hybridization.

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Two additions to the <i>Jacea-Lepteranthus</i> complex: parallel adaptation in the enigmatic species <i>Centaurea subtilis</i> and <i>C. exarata</i>

Cited by 4 publications

References 16 publications

The limitations of molecular markers in phylogenetic reconstruction: The case of Centaurea sect. Phrygia (Compositae)

The limitations of molecular markers in phylogenetic reconstruction: The case of Centaurea sect. Phrygia (Compositae)

Evolution of the central Mediterranean Centaurea cineraria group (Asteraceae): Evidence for relatively recent, allopatric diversification following transoceanic seed dispersal

A Natural Homoploid Hybrid between Centaurea horrida and Centaurea filiformis (Asteraceae) as Revealed by Morphological and Genetic Traits

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