Sympatric populations of Senecio ovatus subsp. ovatus, S. germanicus subsp. germanicus (Compositae) and their hybrid in the Carpathians and the adjacent part of Pannonia

Hodálová, Iva; Valachovič, Milan

doi:10.1016/s0367-2530(17)30726-0

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…(Schmidt-Lebuhn, Kessler, & Kumar, 2006), Hypochaeris (Tremetsberger et al, 2006), and Puya (Jabaily & Sytsma, 2012). In agreement with frequent hybridization in the Senecioneae (Hodálová & Marhold, 1996;Kirk, Máčel, Klinkhamer, & Vrieling, 2004;Lowe & Abbott, 2000;Osborne, Chapman, Nevado, & Filatov, 2016), our molecular data, morphological observations, and previously published genome size values (Dušková et al, 2010) indicate that homoploid hybridization likely occurred among multiple species of former Lasiocephalus.…”

Section: Role Of Hybridizationsupporting

confidence: 88%

Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Dušková

Sklenář

Kolář

et al. 2017

Ecology and Evolution

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Changes in growth forms frequently accompany plant adaptive radiations, including páramo–a high‐elevation treeless habitat type of the northern Andes. We tested whether diverse group of Senecio inhabiting montane forests and páramo represented such growth form changes. We also investigated the role of Andean geography and environment in structuring genetic variation of this group. We sampled 108 populations and 28 species of Senecio (focusing on species from former genera Lasiocephalus and Culcitium) and analyzed their genetic relationships and patterns of intraspecific variation using DNA fingerprinting (AFLPs) and nuclear DNA sequences (ITS). We partitioned genetic variation into environmental and geographical components. ITS‐based phylogeny supported monophyly of a Lasiocephalus‐Culcitium clade. A grade of herbaceous alpine Senecio species subtended the Lasiocephalus‐Culcitium clade suggesting a change from the herbaceous to the woody growth form. Both ITS sequences and the AFLPs separated a group composed of the majority of páramo subshrubs from other group(s) comprising both forest and páramo species of various growth forms. These morphologically variable group(s) further split into clades encompassing both the páramo subshrubs and forest lianas, indicating independent switches among the growth forms and habitats. The finest AFLP genetic structure corresponded to morphologically delimited species except in two independent cases in which patterns of genetic variation instead reflected geography. Several morphologically variable species were genetically admixed, which suggests possible hybrid origins. Latitude and longitude accounted for 5%–8% of genetic variation in each of three AFLP groups, while the proportion of variation attributed to environment varied between 8% and 31% among them. A change from the herbaceous to the woody growth form is suggested for species of high‐elevation Andean Senecio. Independent switches between habitats and growth forms likely occurred within the group. Hybridization likely played an important role in species diversification.

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Section: Role Of Hybridizationsupporting

confidence: 88%

Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Dušková

Sklenář

Kolář

et al. 2017

Ecology and Evolution

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“…The finding of hybridization within the small group of species here analyzed, is reflecting a general feature of the genus (BECK 1992;OBER-PRIELER 1994;HODÁLOVÁ and VALACHOVIC 1996;HODÁLOVÁ 1999). The recurrent origin of polyploid species from genotipically different populations is also frequent (ASHTON and AB-BOTT 1992) and it is also common in other groups such as Tragopogon (Asteraceae) and Dra- ba (Brassicaceae) (SOLTIS andSOLTIS 1993, 1999).…”

Section: Resultsmentioning

confidence: 62%

Chromosome contribution to Andean Polyploid Species of Senecio (Asteraceae), from Argentina

2002

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“…Hybridization. -Widespread incongruence between cladograms obtained from nuclear and plastid DNA sequence data (e.g., Pelser & al., 2010), patterns of ITS polymorphism within specimens, the identification of chimeric ITS sequences , and the identification of putative hybrids that contain species-diagnostic AFLP markers of both parental species (Kirk & al., 2004) suggest that hybridization may have been an important factor in the evolutionary history of Seneci oneae (Beck & al., 1992;Harris & Ingram, 1992;Comes, 1994;Hodálová & Marhold, 1996;Bain & al., 1997;Abbott & al., 2000;Lowe & Abbott, 2000;Hodálová, 2002;Kirk & al., 2004;Kadereit & al., 2006;Pan & al., 2008;Brennan & al., 2009;Pelser & al., 2010. The results of the present study provide additional support for this hypothesis by revealing the occurrence of intergeneric hybridization between Jacobaea and Senecio sect.…”

Section: Discussionmentioning

confidence: 99%

A phylogenetic analysis and new delimitation of Senecio sect. Crociseris (Compositae: Senecioneae), with evidence of intergeneric hybridization

Calvo

Álvarez

Aedo

et al. 2013

TAXON

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Senecio sect. Crociseris is one of the three main sections of western Eurasian/northern African Senecio species. Previous studies indicated that species commonly assigned to this section are closely related to those of sect. Doria. The aim of the research presented here was to test the morphology–based delimitation of sect. Crociseris using phylogenetic analyses of plastid and nuclear DNA sequence data. The results of these studies are used to propose a new delimitation of sect. Crociseris. Species of sect. Doria were nested within a clade formed by species of sect. Crociseris. Section Doria is therefore best considered a synonym of sect. Crociseris. In addition, S. racemosus, traditionally included in sect. Crociseris, is transferred to the genus Jacobaea. One of the two J. kirghisica specimens that were sequenced contains ITS copies that are most closely related to those of sect. Crociseris as well as copies that nest among ITS accessions of Jacobaea. This suggests intergeneric hybridization between Senecio and Jacobaea.

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Sympatric populations of Senecio ovatus subsp. ovatus, S. germanicus subsp. germanicus (Compositae) and their hybrid in the Carpathians and the adjacent part of Pannonia

Cited by 7 publications

References 6 publications

Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Chromosome contribution to Andean Polyploid Species of Senecio (Asteraceae), from Argentina

A phylogenetic analysis and new delimitation of Senecio sect. Crociseris (Compositae: Senecioneae), with evidence of intergeneric hybridization

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