Islands as a crossroad of evolutionary lineages : A case study of Centaurea sect. Centaurea (Compositae) from Sardinia (Mediterranean Basin)
López-Alvarado, Javier (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Mameli, Giulia (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Farris, Emmanuele (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Susanna, Alfonso (Institut Botànic de Barcelona)
Filigheddu, Rossella (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Garcia-Jacas, Núria (Institut Botànic de Barcelona)

Data:	2020
Resum:	The Mediterranean Basin is a biodiversity hotspot, where islands play a key role because of their high biological diversity, degree of endemicity and human pressure. One of these islands, Sardinia, is a good evolutionary laboratory, especially for the study of complex genera, such as Centaurea. In particular, endemic species of Centaurea sect. Centaurea from Sardinia provides an interesting case study of plant evolution on continental islands. We attempted to clarify the processes leading to the diversification of Centaurea species on Sardinia using bi-parentally inherited nuclear markers and maternally inherited plastid markers. Our plastid results revealed the presence of five lineages of sect. Centaurea on the island. Three of them were defined as three species: C. ferulacea, C. filiformis and C. horrida. The other two lineages highlighted the complex evolutionary history of the two polyploids C. corensis and C. magistrorum. Multiple colonization events from the mainland involving the C. deusta and C. paniculata lineages among others, have led to the diversity of sect. Centaurea on Sardinia. One colonization event likely followed a southern path via the land connection between the mainland, the Calabrian Plate and Sardinia. A second pathway likely followed a northern connection, probably through the Tuscan Archipelago. Implications of these findings on conservation efforts for Centaurea endemics on Sardinia are also discussed.
Ajuts:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-514 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1116 Ministerio de Educación y Ciencia CGL2007-60781 Ministerio de Ciencia e Innovación CGL2010-18631
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	PloS one, Vol. 15, Issue 2 (February 2020) , art. e0228776, ISSN 1932-6203

DOI: 10.1371/journal.pone.0228776
PMID: 32032368

19 p, 1.9 MB

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