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Phylogeographic insights of the lowland species Cheirolophus sempervirens in the southwestern Iberian Peninsula

AutorVitales, Daniel ; García-Fernández, Alfredo ; Garnatje, Teresa ; Garnatje, Teresa ; Pellicer, Jaume; Vallès, Jaume
Palabras claveAFLP
Genetic diversity
Genetic structure
Glacial refugia
Pleistocene climatic oscillations
Southern Europe
Fecha de publicación17-jun-2015
CitaciónJournal of Systematics and Evolution 54(1) :65-74 (2016)
ResumenThe southwestern Iberian Peninsula is an important biogeographic region, showing high biodiversity levels and hosting several putative glacial refugia for European flora. Here, we study the genetic diversity and structure of the Mediterranean, thermophilous plant Cheirolophus sempervirens (Asteraceae) across its whole distribution range in SW Iberia, as a tool to disentangle some of the general biogeographic patterns shaping this southern refugia hotspot. Null genetic diversity was observed in the cpDNA sequencing screening. Nonetheless, AFLP data revealed high levels of among-population genetic differentiation correlated to their geographic location. Our results suggest longer species persistence in southern Iberian refugia during glacial periods and subsequent founder effects northwards due to colonizations in warmer stages (i.e., the southern richness to northern purity pattern). Additionally, our phylogeographic analyses indicate the presence of two separate genetic lineages within Ch. sempervirens, supporting the hypothesis of multiple minor refugia for SW Iberia in agreement with the refugia within refugia model.
Descripción5 p., gráf, mapas
Versión del editorhttp://dx.doi.org/10.1111/jse.12162
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