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Université de Fribourg

Molecular biogeography of prickly lettuce (lactuca serriola l.) shows traces of recent range expansion

D’Andrea, Luigi ; Meirmans, Patrick ; Wiel, Clemens van de ; Guadagnuolo, Roberto ; Treuren, Robbert van ; Kozlowski, Gregor ; Nijs, Hans den ; Felber, François

In: Journal of Heredity, 2017, vol. 108, no. 2, p. 194–206

Prickly lettuce (Lactuca serriola L., Asteraceae), a wild relative of cultivated lettuce, is an autogamous species which greatly expanded throughout Western and Northern Europe during the last 2 centuries. Here, we present a large-scale biogeographic genetic analysis performed on a dataset represented by 2622 individuals from 110 wild European populations. Thirty-two maternally inherited...

Université de Fribourg

Parallel declines in species and genetic diversity driven by anthropogenic disturbance: a multispecies approach in a French Atlantic dune system

Frey, David ; Arrigo, Nils ; Granereau, Gilles ; Sarr, Anouk ; Felber, François ; Kozlowski, Gregor

In: Evolutionary Applications, 2016, p. -

Numerous studies assess the correlation between genetic and species diversities, but the processes underlying the observed patterns have only received limited attention. For instance, varying levels of habitat disturbance across a region may locally reduce both diversities due to extinctions, and increased genetic drift during population bottlenecks and founder events. We investigated the...

Université de Neuchâtel

Climate change, anthropogenic disturbance and the northward range expansion of Lactuca serriola (Asteraceae)

D'Andrea, Luigi ; Broennimann, Olivier ; Kozlowski, Gregor ; Guisan, Antoine ; Morin, Xavier ; Keller-Senften, Julia ; Felber, François

In: Journal of Biogeography, 2009, vol. 36, p. 1-15

Aim The distribution range of Lactuca serriola, a species native to the summer-dry mediterranean climate, has expanded northwards during the last 250 years. This paper assesses the influence of climate on the range expansion of this species and highlights the importance of anthropogenic disturbance to its spread. Location Central and Northern Europe. ...

Université de Neuchâtel

Spontaneous gene flow and population structure in wild and cultivated chicory, Cichorium intybus L.

Kiær, L. P. ; Felber, François ; Flavell, A. ; Guadagnuolo, Roberto ; Guiatti, D. ; Hauser, T. P. ; Olivieri, A. M. ; Scotti, I. ; Syed, N. ; Vischi, M. ; van de Wiel, C. ; Jørgensen, R. B.

In: Genetic Resources and Crop Evolution, 2008, p. 1-15

Spontaneous gene flow between wild and cultivated chicory, Cichorium intybus L. , may have implications for the genetic structure and evolution of populations and varieties. One aspect of this crop-wild gene flow is the dispersal of transgenes from genetically modified varieties, e.g. gene flow from GM chicory to natural chicory could have unwanted consequences. With the purpose to...

Université de Neuchâtel

Phénologie de la floraison de populations diploïdes et tétraploïdes d'Anthoxanthum alpinum et d'Anthoxanthum odoratum

Felber, François

In: Journal canadien de botanique, 1988, vol. 66, no. 11, p. 2258-2264

La phénologie de la floraison a été étudiée, en jardin expérimental, sur des populations diploïdes et tétraploïdes d'Anthoxanthum alpinum A. & D. Löve et d'A. odoratum L. du centre et du sud de l'Europe ainsi que, in situ, dans une zone de contact entre l'A. alpinum diploïde et l'A. odoratum tétraploïde. En jardin expérimental, les paramètres...

Université de Neuchâtel

Effect of triploid fitness on the coexistence of diploids and tetraploids

Felber, François ; Bever, James D.

In: Biological Journal of the Linnean Society, 1997, vol. 60, no. 1, p. 95-106

The conditions for the coexistence of diploids, triploids and tetraploids in a single population were investigated with a deterministic model under the assumptions that diploids might produce 2n gametes, and that triploids had a lower fitness than other cytotypes and generated equal proportions of haploid and diploid gametes. When diploids produced only haploid gametes, the dynamics of the...