Scopus: First insights into genetic structure and diversity of Corylus colurna L. for conservation of its genetic resources and possible assisted migration
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info:eu-repo/semantics/openAccess
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Abstract
Climate change is already affecting all forest ecosystems and threatening species therein. By establishing mixed
forests incorporating other tree species (e. g. scattered broadleaves) adaptation of forest stands to changing
environmental conditions can be improved and the risks minimized. Turkish hazel (Corylus colurna L.) has been
currently discussed as a valuable so-called alternative tree species in some European regions because it is well
adapted to difficult environmental conditions. However, in its natural distribution area Turkish hazel has been
overexploited because of its valuable wood and can only be found in small and isolated populations. Therefore,
we examined the genetic structure and variation of Turkish hazel covering most of its natural distribution range
in Asia Minor, the Caucasus, and the Balkan Peninsula. Altogether, 689 Turkish hazel trees from 25 populations
were analysed at 15 nuclear and five chloroplast microsatellite markers. Both data sets revealed distinct genetic
clusters of Turkish hazel in its natural distribution range, suggesting separate refugia and migration pathways
during the Holocene. Medium to high level genetic variation was found, with somewhat lower values in Georgia
and Turkey compared to the Balkan populations. Overall, our results highlight the need to delineate provenance
regions, identify gene conservation units (GCUs) and seed stands for Turkish hazel which are essential for species
conservation, provenance research and possible assisted migration attempts. Based on our results each country is
able now to start conservation programs and select GCUs for Turkish hazel.
Date
2023
Publisher
Elsevier B.V.
Description
Keywords
Turkish hazel, Forest genetic resources, FGR, Forest reproductive material, FRM, Seed stands, Genetic diversity, Microsatellite markers,
DNA, cpDNA