The first results of this ongoing project suggest that in some countries a very small number of native field elm genotypes have comparatively high levels of tolerance to DED. In Spain, for example, of around 5,000 native elms evaluated to 2013, some 25 genotypes (0.5% of those tested) fall into this category; and it is now hoped that the controlled crossing of the best seven of these (genetically and aesthetically) will produce Ulmus minor hybrids with effective 'field resistance' and market appeal.‘Spanish Clones’ (Oct. 2013) resistantelms.co.uk Similar results are beginning to emerge in trials on surviving field elms in Greece.Δoκιμή ανθεκτικότητας ελληνικών γενoτύπων πεδινής φτελιάς (Ulmus minor) κατά της Oλλανδικής ασθένειας, Σ. Διαμαντής και X. Περλέρου (:Resistance test of Greek Field Elm against Dutch Elm Disease, by S. Diamantis and H. Perlerou)
