Abstract
In many countries, apart from creative cultivation, clone selection is also carried out to get the most valuable rootstocks for apple trees. In years 2008–2010, in the
Department of Dendrology and Nursery Production of University of Life Sciences in Poznań, an experiment, which is described below, was conducted. Its aim was to estimate a degree of morphological, phenological and genetic variability of 15 clones originating from crossing A2 and B9 rootstocks. Observations that were carried out confirmed variability of the above mentioned features of clones. The differences were found in morphology of shoots, leaves, buds and in terms of the beginning of vegetation. Analysis of the results made it possible to separate four clones with desired feature of the reduction of the vigour of growth. The clones were marked as number 5, 11, 12 and 13, and they can turn out to be valuable rootstocks for apple trees. With help of PCR-RAPD method genetic variability of the clones number 2 and 3 was shown, as well.
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