From in vitro clones to high-quality timber production: the Project "Wavy Grain Maple"
Wavy grain maple is a rare growth variation of sycamore maple (Acer pseudoplatanus L.) with wood fibres undulating in the tree rings. Due to its attractive timber, it belongs to the most expensive hardwoods in Central Europe. lt has never been produced systematically for commercial use, although wavy grain maple has a great popularity and is in demand. In 2016, therefore, a national joint project started to expiore possibilities for its commercial use, and to investigate the causes for the wavy grain structure in sycamore maple. Here, we report about first resuits achieved by one of the five project partners, the Thünen Institute. We give an overview an selected clones and their propagation by tissue culture, as well as the establishment of planned field trials. Furthermore, we present a method for the clone identification of sycamore maple using highly variable nuclear microsatellite markers.