Cirsium ×sudae

Michálková, Ester; Šmerda, Jakub; Knoll, A.; Bureš, Petr

doi:10.23855/preslia.2018.347

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…2007; Michálková et al . 2018, 2023), of all herbarium specimens of putative hybrids may potentially reveal that many of them are only defect/pauperized individuals of pure species (see Table S5C), where morphology‐based reassessment calls into question the existence of nearly half of the intergeneric Cirsium – Lophiolepis hybrids for which specimens were accessible. During our revision of Central European herbaria, we discovered that among specimens initially identified as hybrids, 9.9% were, in fact, pure species, and 5.3% were other hybrids.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, although intergeneric hybrids are also reported between Cirsium and Carduus (see Vukotinović 1877, p. 206;Guétrot 1925, p. 29;Fournier 1928Fournier , p. 277, 1940Fournier , p. 1001Fournier -1004Sennen 1931, p. 19), it was never used as an argument against the taxonomic relevance of these genera. Nevertheless, a comprehensive revision, ideally supported by molecular analyses (Segarra-Moragues et al 2007;Michálková et al 2018Michálková et al , 2023, of all herbarium specimens of putative hybrids may potentially reveal that many of them are only defect/pauperized individuals of pure species (see Table S5C), where morphology-based reassessment calls into question the existence of nearly half of the intergeneric Cirsium-Lophiolepis hybrids for which specimens were accessible. During our revision of Central European herbaria, we discovered that among specimens initially identified as hybrids, 9.9% were, in fact, pure species, and 5.3% were other hybrids.…”

Section: Spontaneous Hybridization Of Cirsium Vulgare Withmentioning

confidence: 99%

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Intergeneric hybrid origin of the invasive tetraploid Cirsium vulgare

Bureš,

Del Guacchio,

Šmerda

et al. 2024

Plant Biol J

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The invasive tetraploid Cirsium vulgare hybridizes with both Cirsium and Lophiolepis. Its conflicted position in molecular phylogenies, and its peculiar combination of morphological, anatomical, and genomic features that are alternatively shared with representatives of Cirsium or Lophiolepis, strongly suggest its intergeneric hybrid origin. Genetic relationships of C. vulgare (8 samples) with genus Lophiolepis (11 species) and other representatives of genus Cirsium (12 species) were evaluated using restriction site‐associated DNA sequencing (RADseq) and examined using analytical and imaging approaches, such as NeighborNet, Heatmap, and STRUCTURE, to identify nuclear genomes admixture. Estimation of the intensity of spontaneous hybridization within and between Cirsium and Lophiolepis was based on herbarium revisions and published data for all reported hybrids pertinent to taxa currently included in Cirsium or Lophiolepis. The genome of any examined Cirsium species is more similar to C. vulgare than to any Lophiolepis species, and vice versa. The nuclear genome of the tetraploid C. vulgare is composed of two equivalent parts, each attributable either to Lophiolepis or to Cirsium; the organellar RADseq data clustered C. vulgare with the genus Cirsium. Spontaneous hybridization between Cirsium and Lophiolepis is significantly less intensive than within these genera. Our analyses provide compelling evidence that the invasive species C. vulgare has an allotetraploid intergeneric origin, with the maternal parent from Cirsium and the paternal from Lophiolepis. For the purpose of delimiting monophyletic genera, we propose keeping Lophiolepis separate from Cirsium and segregating C. vulgare into the hybridogenous genus Ascalea.

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Section: Discussionmentioning

confidence: 99%

Section: Spontaneous Hybridization Of Cirsium Vulgare Withmentioning

confidence: 99%

Intergeneric hybrid origin of the invasive tetraploid Cirsium vulgare

Bureš,

Del Guacchio,

Šmerda

et al. 2024

Plant Biol J

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Hybridization may endanger the rare North Apennine endemic Cirsium bertolonii

et al. 2023

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We examined populations of North Apennine stenoendemics Cirsium bertolonii in the Apuan Alps and Tuscan-Emilian Apennines and found individuals morphologically shifted to co-occurring C. acaulon or C. erisithales. Hybrid status of these intermediates was confirmed by flow cytometry, morphometrics and amplified fragment length polymorphism (AFLP). We interpreted these hybrids taxonomically as Cirsium ×sagrense (C. acaulon × C. bertolonii) and C. ×abetonense (C. bertolonii × C. erisithales). Estimated genome size (2C) was 2244 ± 31 Mbp for C. ×sagrense and 2152 ± 99 Mbp for C. ×abetonense. Their genomic GC content was 38.95 ± 0.35% and 38.77 ± 0.26%, respectively. Diploid chromosome number 2n = 34 was counted for C. bertolonii, and the previously reported 2n = 12 needs to be considered erroneous. We found C. bertolonii to be a gynodioecious species (like many other Cirsium species) that is not reproductively isolated by ploidy level or chromosome number from co-occurring congeners. The relatively frequent occurrence of C. ×sagrense in Monte Sagro (locus classicus of C. bertolonii) and the prevalence of C. ×abetonense in Alpe Tre Potenze suggest that hybridization occurs repeatedly in C. bertolonii, as also confirmed by older herbarium specimens. C. ×abetonense produces ripe achenes and F2 hybrids or backcrosses, as some other Cirsium hybrids do. Genetic erosion/swamping via interspecific hybridization can therefore pose a risk to the genetic integrity of C. bertolonii, as it does for some other narrowly endemic high-mountain Cirsium species in Europe.

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Lophiolepis (=Cirsium Epitrachys seksiyonu) cinsine ait Türkiye’den yeni bir melez kaydı (Asteraceae, Carduinae)

ÖZCAN

2023

Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi

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Lophiolepis Cass., is newly separated from the genus Cirsium Miller in the light of recent molecular studies, belonging to the tribe Cardueae of the family Asteraceae (subtribe Carduinae). It has a high affinity to form interspecific and intersubspecific hybrids under certain circumstances. In the present study, one hybrid combination, Lophiolepis x trifurca (Petr.) Bureš, Del Guacchio, Iamonico & P.Caputo which was previously described as Cirsium x trifurcum Petrak by Petrak in 1914 from Bakuriani (Georgia) is newly recorded for Turkish Flora. The hybrid specimens have intermediate characters with parental species; Lophiolepis kosmelii (Adams) Bureš, Del Guacchio, Iamonico & P.Caputo and L. caucasica (Adams) Bureš, Del Guacchio, Iamonico & P.Caputo. Plant samples including parental species were collected from Şavşat district of Artvin province in sympatric populations. These specimens were carefully examined and compared with the putative parents, and morphological character measurements of hybrid plants, as well as parental species were carried out. Natural habits of the samples were photographed, drawings of cauline leaves were supplied using stereomicroscope, leaf micromorphological characters were determined and anatomical characteristics were compared with parents, in detail. In conclusion, intermediate morphological characteristics between L. x trifurca and its parents were determined in terms of features such as cauline leaves, phyllaries, capitula and corolla. It has spines in adaxial sides, uniseriate multicellular tomentose trichomes in abaxial ones. Cuticle has striate appearance near to the stomata/ trichome bases in abaxial surface and scale/granules are shown in adaxial parts. This taxon has amphistomatic leaves and dorsiventral mesophyll as in the parental species.

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Cirsium ×sudae

Cited by 4 publications

References 17 publications

Intergeneric hybrid origin of the invasive tetraploid Cirsium vulgare

Intergeneric hybrid origin of the invasive tetraploid Cirsium vulgare

Hybridization may endanger the rare North Apennine endemic Cirsium bertolonii

Lophiolepis (=Cirsium Epitrachys seksiyonu) cinsine ait Türkiye’den yeni bir melez kaydı (Asteraceae, Carduinae)

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