Variation in growth and stem quality among and within provenances of sycamore (Acer pseudoplatanus) in Denmark

Abstract: Sycamore currently covers around 2% of the Danish forest cover and is an economic attractive species that is also interesting for ecological reasons. This thesis analyses a provenance and progeny trial series in Denmark in order to get an overview of suitable provenances for Denmark, the importance of provenance selection and possible breeding gains. The trial is of planted 2 year old sycamore measured after 9 years and consist out of 16 provenances. Experimental blocks on three sites were measured for the height, dbh straightness and forking behaviour. This data was analysed for significant differences between provenances and for heritability. The results found are that there are significant differences between provenances regarding height growth, diameter growth, stem straightness and forking frequency below 130 centimetres. Three provenances seem promising for the growth conditions in Denmark. Furthermore the analysis shows that there is heritability for height, diameter and stem straightness and that genetic gains for these traits are possible.