Cytotaxonomic Studies in the Genus Campanula

Gadella, Th.W.J.

doi:10.1111/j.1438-8677.1964.tb00014.x

Cited by 81 publications

(57 citation statements)

References 28 publications

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“…This clade presents much more heterogeneity in chromosome numbers, basic numbers and ploidy levels than Campanula s. str. clade (Gadella, 1964). Stebbins (1966) pointed out that aneuploid reduction in chromosome number and polyploidy are characteristic of many species groups which occupy pioneer habitats.…”

Section: Migration To North Americamentioning

confidence: 99%

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Roquet

Sanmartín

Garcia‐Jacas

et al. 2009

Molecular Phylogenetics and Evolution

115

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a b s t r a c tWe reconstruct here the spatial and temporal evolution of the Campanula alliance in order to better understand its evolutionary history. To increase phylogenetic resolution among major groups (Wahlenbergieae-Campanuleae), new sequences from the rbcL region were added to the trnL-F dataset obtained in a previous study. These phylogenies were used to infer ancestral areas and divergence times in Campanula and related genera using a Bayesian approach to molecular dating and dispersal-vicariance analyses that takes into account phylogenetic uncertainty. The new phylogenetic analysis confirms Platycodoneae as the sister group of Wahlenbergieae-Campanuleae, the two last ones inter-graded into a well-supported clade. Biogeographic and dating analyses suggest that Western Asia and the Eastern Mediterranean have played a major role as centers of migration and diversification within the Campanula alliance, probably in relation to the intense orogenic activity that took place in this region during the Late Neogene, and that could have promoted isolation and allopatric speciation within lineages. Diversification rates within several Campanula lineages would have increased at the end of the Miocene, coinciding with the Messinian Stage. Strong selective pressures from climate changes and the expansion of mountainous regions during this period are suggested to explain the adaptation to drought, cold or disturbed environments observed in many Campanula species. Several independent long-distance dispersal events to North America are inferred within the Rapunculus clade, which seem to be related to high ploidy levels.

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Section: Migration To North Americamentioning

confidence: 99%

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Roquet

Sanmartín

Garcia‐Jacas

et al. 2009

Molecular Phylogenetics and Evolution

115

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“…dichotoma : n = 12 (Gadella, 1964 ;Thulin, 1975 ;Contandriopoulos, 1981) ; Italie méridionale, Sicile, Grèce, Tunisie, Algérie.…”

unclassified

“…colorata Wall, endémique himalayenne, annuelle, participe avec C. cashmeriana Royle dont l'aire géographique s'étend au Tibet, à l'Afghanistan, au Kashmir et à l'Himalaya, au «Himalayan group» (Crook, 1951, Gadella, 1964. Ces 2 espèces sont étroitement apparentées par des caractères floraux (calices sans appendices avec des lobes largement foliacés, corolle légèrement pubescente à 1 'extérieur, bien visible, pollens de petite dimension et de même diamètre) et caryologiques (chromosomes semblables, 2n = 28).…”

unclassified

Polyphylétisme des campanules annuelles

Contandriopoulos¹

1984

Bulletin de la Société Botanique de France. Lettres Botaniques

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Les campanules annuelles, extrêmement complexes (6 sous-genres), sont d'origine polyphylétique. L'auteur montre que des lignées différentes ont pris naissance, soit par dysploïdie, de type descendant, accompagnée parfois de polyploïdie, soit à partir d'espèces vivaces avec lesquelles elles présentent de réelles affinités (dans ce cas, les annuelles ont le même nombre chromosomique ou un nombre dérivé de celui des espèces vivaces). Enfin, certaines annuelles forment avec des taxons vivaces et bisannuels de grands complexes d'espèces fortement apparentées entre elles.Summary.· The annual and very complexe Campanulo (6 subgenera) have a polyphyletic origin. The author shows that they are originated either by a decreasing dysploidy, sometimes accompagned with polyploidy, either from perennial species with which, they present a great resemblance (in this case, annuals have the same chromosome number or a derivated number of the perennial one). At last, sorne annuals form with perennial and bisannual taxa great complexes of related species.

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“…Rapunculus Boiss., where it traditionally belongs. The relatively successful crossing experiments of C. pyramidalis with C. carpatica (Gadella, 1964) indicate that the evolutionary lineage of C. carpatica could have developed from the same ancient ''isophylloid'' stock. It is interesting that possible relations of the ''isophylloid'' taxa to the ancient C. sect.…”

Section: ''Isophylloids''mentioning

confidence: 96%

“…The first, C. carpatica Jacq., is a paleoendemic species (Mráz, 2004) of the Campanula section Rapunculus Boiss. common in horticulture, which still hybridizes with a number of Campanula taxa (Gadella, 1964), and could be considered, to some extent, as an ''isophylloid'' species. The second one is Asyneuma pichleri (Vis.)…”

Section: Plant Samplesmentioning

confidence: 99%

Relations between western Balkan endemicCampanulaL. (Campanulaceae) lineages: Evidence from chloroplast DNA

Liber

Kovačić

Nikolić

et al. 2008

Plant Biosystems - An International Journal Dealing with all As

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The relationships among western Balkan and some amphi-Adriatic endemic campanulas were studied using RFLP analysis of the 1.8-kb trnT -trnF chloroplast DNA region. The results were compared to those of a comparative floral morphometry study performed earlier on a similar sample. Maximum parsimony and distance methods produced very similar results to those of the floral morphometry, both of which point to a clear separation of the taxa into three main clades. The first isophyllous, or Garganicae series, clade comprised Campanula poscharskyana, C. portenschlagiana, C. garganica, C. reatina and two C. fenestrellata-subspecies. The second ''isophylloid'' clade consisted of C. pyramidalis agg., C. waldsteiniana agg. and C. carpatica. The third, heterophyllous clade was very uniform, comprising undistinguishable taxa of the C. rotundifolia complex and alpine endemic C. cochleariifolia. Interestingly the Ligurian stenoendemic C. isophylla was clearly separated from the members of the ser. Garganicae, C. reatina was the most distant taxon in the Garganicae clade, the controversial species Asyneuma pichleri was nested inside the Campanula core, while Campanula carpatica was closer to the ''isophylloids'' than to the sect. Rapunculus Boiss. In order to resolve the taxonomic uncertainty among the closely related heterophyllous taxa more refined molecular methods, e.g. AFLP or microsatellites, should be applied.

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Cytotaxonomic Studies in the Genus Campanula

Cited by 81 publications

References 28 publications

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Polyphylétisme des campanules annuelles

Relations between western Balkan endemicCampanulaL. (Campanulaceae) lineages: Evidence from chloroplast DNA

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