[Pluriennal comparison between "in vitro" selfrooted and grafted trees of apple and cherry]
1992
Sansavini, S. | Corelli, L. (Bologna Univ. (Italy). Istituto di Coltivazioni Arboree)
The effect of micropropagation on the stability of the agronomic traits and on the performance of apple and sweet cherry cultivars was evaluated in a six-year trial, comparing micropropagated vs maiden trees of the cv "Early Neipling" (apple) and "Vittoria" (sweet cherry). Micropropagated apple trees grew bigger than those grafted, and were delayed in bearing; however, the fruits from the former were larger, thus making up for their belated productivity. No differences were found as for mineral content of the leaves, except for higher Ca levels in the grafted trees. As opposite, micropropagated cherry trees grew less than the grafted ones, without negative effects on their productivity. Leaf mineral content data confirmed the results for apple, with higher Ca and Mg in the grafted trees. The differences in the behaviour of micropropagated trees of apple and sweet cherry, the latter more satisfactory - mostly for its cropping efficiency - point to the importance of the interaction between cultivar and environment, in evaluating the performance of micropropagated fruit trees
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