@misc{10481/60111,
year = {2019},
month = {3},
url = {http://hdl.handle.net/10481/60111},
abstract = {Late Neogene and Quaternary climatic oscillations have greatly shaped the genetic
structure of the Mediterranean Basin flora, with mountain plant species tracking
warm interglacials/cold glacials by means of altitudinal shifts instead of broad
latitudinal ones. Such dynamics may have enhanced population divergence but also
secondary contacts. In this paper, we use a case example of subsection Willkommia
of Centaurea (comprising three narrowly distributed endemic species, Centaurea
gadorensis, C. pulvinata, and C. sagredoi) to test for reticulate evolution and recurrent
hybridizations between nearby populations. For this, we combine analyses of genetic
diversity and structuring, gene flow and spatial correlation, and ecological niche
modeling. Our results support the contention that the current genetic structure of
the three species is the result of historical gene flow at sites of secondary contact
during the glacial periods, followed by isolation after the retraction of populations to
the middle-upper areas of the mountains during the interglacial periods. The extent and
direction of the gene flow was determined largely by the location of the populations on
mountainsides oriented toward the same valley or toward different valleys, suggesting
the intermountain valleys as the areas where secondary contacts occurred.},
organization = {This research was supported by a Technical Assistance agreement
between E.G.M.A.S.A. (Empresa de Gestión Medioambiental
S. A., Consejería de Medio Ambiente, Junta de Andalucía)
and the University of Granada (ref. NET699759), by the
Spanish Ministry of Science and Innovation (Project CGL2007-
60781/BOS), the Generalitat de Catalunya (“Ajuts a Grups de
Recerca Consolidats” 2009/SGR/00439 and 2017-SGR1116), and
the CSIC (“Proyecto Intramural Especial” grant no. 200730i035
awarded to RV and JAE-Doc contract to JL-P). SB-MS received
a Beca-Colaboración grant from the Spanish Ministry of
Education and a Beca-Iniciación a la Investigación grant from the
University of Granada.},
publisher = {Frontiers Media},
keywords = {Centaurea},
keywords = {Gene flow},
keywords = {Quaternary glaciations},
keywords = {Reticulate evolution},
keywords = {Secondary contacts},
title = {Influence of the Quaternary Glacial Cycles and the Mountains on the Reticulations in the Subsection Willkommia of the Genus Centaurea},
doi = {10.3389/fpls.2019.00303},
author = {Ben-Menni Schuler, Samira and López Pujol, Jordi and Blanca López, Gabriel and Vilatersana, Roser and García Jacas, Nuria and Suárez Santiago, Víctor},
}