Both authors contributed equally to this work.
Balearic insular isolation and large continental spread framed the phylogeography of the western Mediterranean Cheirolophus intybaceus s.l. (Asteraceae)
Article first published online: 3 JUL 2012
© 2012 German Botanical Society and The Royal Botanical Society of the Netherlands
Volume 15, Issue 1, pages 166–175, January 2013
How to Cite
Garnatje, T., Pérez-Collazos, E., Pellicer, J. and Catalán, P. (2013), Balearic insular isolation and large continental spread framed the phylogeography of the western Mediterranean Cheirolophus intybaceus s.l. (Asteraceae). Plant Biology, 15: 166–175. doi: 10.1111/j.1438-8677.2012.00632.x
Editor D. Byers
- Issue published online: 28 NOV 2012
- Article first published online: 3 JUL 2012
- Received: 30 November 2011; Accepted: 24 April 2012
- Balearic Islands;
- Dianic range;
- genetic diversity and structure;
- Ibero-Provençal region
Recent Quaternary geological and climate events have shaped the evolutionary histories of plant species in the Mediterranean basin, one of the most important hotspots of biodiversity. Genetic analyses of the western Mediterranean Cheirolophus intybaceus s.l. (Asteraceae) based on AFLP were conducted to establish the relationships between its close species and populations, to reconstruct the phylogeography of the group and to analyse potential unidirectional versus bidirectional dispersals between the Ibero-Provençal belt and the Balearic Islands. AFLP data revealed two main genetic groups, one constituted by the Balearic populations and Garraf (NE Iberia) and the other formed by the remaining mainland populations that were further sub-structured into two geographically separated subgroups (SE + E Iberia and NE Iberia + SW France). Genetic diversity and spatial structure analyses suggested a mid-Pleistocene scenario for the origin of C. intybaceus in southern Iberia, followed by dispersal to the north and a single colonisation event of the Balearic archipelago from the near Dianic NE Iberian area. This hypothesis was supported by paleogeographic data, which showed the existence of terrestrial connections between the continent and the islands during the Middle–Late Pleistocene marine regressions, whereas the more recent single back-colonisation of the mainland from Mallorca might be explained by several hypotheses, such as long-distance dispersal mediated by migratory marine birds or sea currents.