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Northern glacial refugia and altitudinal niche divergence shape genome-wide differentiation in the emerging plant model Arabidopsis arenosa
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SYSNO ASEP 0464283 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Northern glacial refugia and altitudinal niche divergence shape genome-wide differentiation in the emerging plant model Arabidopsis arenosa Author(s) Kolář, Filip (BU-J) ORCID, RID
Fuxová, G. (CZ)
Záveská, E. (AT)
Nagano, A. J. (JP)
Hyklová, L. (CZ)
Lučanová, Magdalena (BU-J) RID, ORCID
Kudoh, H. (JP)
Marhold, K. (CZ)Number of authors 8 Source Title Molecular Ecology. - : Wiley - ISSN 0962-1083
Roč. 25, č. 16 (2016), s. 3929-3949Number of pages 21 s. Language eng - English Country GB - United Kingdom Keywords approximate Bayesian computatuion ; niche differentiation ; phytogeography ; Arabidopsis Subject RIV EF - Botanics Institutional support BU-J - RVO:67985939 UT WOS 000381578200011 EID SCOPUS 84981736399 DOI 10.1111/mec.13721 Annotation The tropical Andes represent one of the world's biodiversity hot spots, but the evolutionary drivers generating their striking species diversity still remain poorly understood. In the treeless high-elevation Andean environments, Pleistocene glacial oscillations and niche differentiation are frequently hypothesized diversification mechanisms; however, sufficiently densely sampled population genetic data supporting this are still lacking. Here, we reconstruct the evolutionary history of Loricaria (Asteraceae), a plant genus endemic to the Andean treeless alpine zone, based on comprehensive population-level sampling of 289 individuals from 67 populations across the entire distribution ranges of its northern Andean species. Partly incongruent AFLP and plastid DNA markers reveal that the distinct genetic structure was shaped by a complex interplay of biogeography (spread along and across the cordilleras), history (Pleistocene glacial oscillations) and local ecological conditions. While plastid variation documents an early split or colonization of the northern Andes by at least two lineages, one of which further diversified, a major split in the AFLP data correlate with altitudinal ecological differentiation. This suggests that niche shifts may be important drivers of Andean diversification not only in forest-alpine transitions, but also within the treeless alpine zone itself. The patterns of genetic differentiation at the intraspecific level reject the hypothesized separation in spatially isolated cordilleras and instead suggest extensive gene flow among populations from distinct mountain chains. Our study highlights that leveraging highly variable markers against extensive population-level sampling is a promising approach to address mechanisms of rapid species diversifications. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2017
Number of the records: 1