Scots pine - panmixia and the elusive signal of genetic adaptation.

Autor: Bruxaux J; Department of Ecology and Environmental Science, Umeå Plant Science Center, Umeå University, 901 87, Umeå, Sweden., Zhao W; Department of Ecology and Environmental Science, Umeå Plant Science Center, Umeå University, 901 87, Umeå, Sweden., Hall D; Department of Ecology and Environmental Science, Umeå Plant Science Center, Umeå University, 901 87, Umeå, Sweden.; Forestry Research Institute of Sweden (Skogforsk), 918 21, Sävar, Sweden., Curtu AL; Department of Silviculture, Transilvania University of Braşov, 500123, Braşov, Romania., Androsiuk P; Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719, Olsztyn, Poland., Drouzas AD; Laboratory of Systematic Botany and Phytogeography, School of Biology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece., Gailing O; Department of Forest Genetics and Forest Tree Breeding, University of Göttingen, 37077, Göttingen, Germany., Konrad H; Department of Forest Biodiversity and Nature Conservation, Unit of Ecological Genetics, Austrian Research Centre for Forests (BFW), 1140, Vienna, Austria., Sullivan AR; Department of Ecology and Environmental Science, Umeå Plant Science Center, Umeå University, 901 87, Umeå, Sweden., Semerikov V; Institute of Plant and Animal Ecology, Ural Division of Russian Academy of Sciences, 620144, Ekaterinburg, Russia., Wang XR; Department of Ecology and Environmental Science, Umeå Plant Science Center, Umeå University, 901 87, Umeå, Sweden.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Aug; Vol. 243 (3), pp. 1231-1246. Date of Electronic Publication: 2024 Feb 02.
DOI: 10.1111/nph.19563
Abstrakt: Scots pine is the foundation species of diverse forested ecosystems across Eurasia and displays remarkable ecological breadth, occurring in environments ranging from temperate rainforests to arid tundra margins. Such expansive distributions can be favored by various demographic and adaptive processes and the interactions between them. To understand the impact of neutral and selective forces on genetic structure in Scots pine, we conducted range-wide population genetic analyses on 2321 trees from 202 populations using genotyping-by-sequencing, reconstructed the recent demography of the species and examined signals of genetic adaptation. We found a high and uniform genetic diversity across the entire range (global F ST 0.048), no increased genetic load in expanding populations and minor impact of the last glacial maximum on historical population sizes. Genetic-environmental associations identified only a handful of single-nucleotide polymorphisms significantly linked to environmental gradients. The results suggest that extensive gene flow is predominantly responsible for the observed genetic patterns in Scots pine. The apparent missing signal of genetic adaptation is likely attributed to the intricate genetic architecture controlling adaptation to multi-dimensional environments. The panmixia metapopulation of Scots pine offers a good study system for further exploration into how genetic adaptation and plasticity evolve under gene flow and changing environment.
(© 2024 The Authors. New Phytologist © 2024 New Phytologist Foundation.)
Databáze: MEDLINE
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