FIELD PERFORMANCE DIFFERENCES IN THREE APRICOT CULTIVARS PROPAGATED BY TISSUE CULTURE OR BY GRAFTING
A comparison between self-rooted trees, micropropagated in vitro, and trees grafted by traditional methods of the three apricot cultivars Canino, Helena and Lorna has been carried out in an experiment in the orchard. All Helena and Lorna trees were planted in 2000 whereas Canino trees, self-rooted or grafted, were planted in 2002. In Helena, a significantly-higher total weight of fruits per tree was found in self-rooted trees, which may indicate a faster entry into production of the self-rooted trees. In Lorna, the total weight of fruits per tree was higher in self-rooted trees although differences were not significant. The trunk diameter, measured at 25 cm above the ground, was significantly greater in self-rooted trees of Lorna while significant differences were not found for Helena or Canino. Given that, at the beginning of the experiment, grafted trees were double the size of the self-rooted, this indicates that more-vigorous trees are obtained from in vitro culture.
Pérez-Tornero, O., Lopez, J.M., Garcia Montiel, F. and Burgos, L. (2006). FIELD PERFORMANCE DIFFERENCES IN THREE APRICOT CULTIVARS PROPAGATED BY TISSUE CULTURE OR BY GRAFTING. Acta Hortic. 717, 255-260
production, micropropagation, vigour, own-rooted trees