Abstract
The role of epigenetic phenomena in plant adaptation is becoming widely recognized and the potential of epigenetics for forestry practice has been demonstrated as well. In this study, methylation-sensitive amplification polymorphism (MSAP) markers were investigated in 20 European beech (Fagus sylvatica L.) provenances that cover most of Europe and were planted in two climatically contrasting provenance trial plots. Correlations of cytosine-methylation patterns at five loci and overall DNA methylation with climatic conditions of the sites of population origin and budburst phenology were detected, suggesting that methylation at particular loci was influenced by the weather or photoperiod during embryogenesis or even earlier. Alternation of methylation patterns may also have been caused by genetic mutation. Frequencies of methylation patterns at three loci differed between the two trial locations, indicating that a climatically induced change of methylation during the ontogeny occurs as well. The results suggest that the rules for collection, transfer, and use of forest reproductive materials should also consider epigenetic effects.
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