Walas, Ł, Ganatsas, P, Iszkuło, G, Thomas, PA and Dering, M (2019) Spatial genetic structure and diversity of natural populations of Aesculus hippocastanum L. in Greece. PLoS One, 14 (12). e0226225 - ?.

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Abstract

Horse-chestnut (Aesculus hippocastanum L.) is an endemic and relict species from the Mediterranean biodiversity hotspot and a popular ornamental tree. Knowledge about the evolutionary history of this species remains scarce. Here, we ask what historical and ecological factors shaped the pattern of genetic diversity and differentiation of this species. We genotyped 717 individuals from nine natural populations using microsatellite markers. The influence of distance, topography and habitat variables on spatial genetic structure was tested within the approaches of isolation-by-distance and isolation-by-ecology. Species niche modeling was used to project the species theoretical range through time and space. The species showed high genetic diversity and moderate differentiation for which topography, progressive range contraction through the species' history and long-term persistence in stable climatic refugia are likely responsible. A strong geographic component was revealed among five genetic clusters that are connected with very limited gene flow. The environmental variables were a significant factor in the spatial genetic structure. Modeling results indicated that future reduction of the species range may affect its survival. The possible impact of climate changes and high need of in situ conservation are discussed.

Item Type: Article
Additional Information: This is the final published version (version of record). It was first published online via Public Library of Science at https://doi.org/10.1371/journal.pone.0226225 - please refer to any applicable terms of use of the publisher.
Subjects: Q Science > QH Natural history
Divisions: Faculty of Natural Sciences > School of Life Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 16 Jan 2020 20:04
Last Modified: 11 Mar 2020 09:56
URI: http://eprints.keele.ac.uk/id/eprint/7514

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