ISHS Acta Horticulturae 577: VII International Symposium on Plum and Prune Genetics, Breeding and Pomology
BEHAVIOUR OF MICROPROPAGATED OWN-ROOTED TREES OF PLUM CV. STANLEY IN THE ORCHARD. 2. REPRODUCTIVE BEHAVIOUR |
| Authors: | S. Popov, M. Prodanova |
| Keywords: | own-rooted trees, micropropagation, in vitro, plum, behaviour, P. domestica |
| Abstract:
An orchard study was conducted on the reproductive behaviours of own-rooted micropropagated plants of plum cv. Stanley that had been grown for a single year in the nursery. For comparison, trees produced traditionally by budding on clonal (GF 655/2) and seedling (Dzhanka 4 – P. cerasifera Ehrh.) rootstocks, as well as in vitro plants of the same cultivar, further grown in the nursery for two vegetation periods, were planted. Observations were made on bearing initiation, yield, fruit quality and chemical composition. The rapidly-produced micropropagated own-rooted trees and those grown for two years in the nursery started bearing during the second vegetation, as did also those budded on clonal and seedling rootstocks. Their typical feature was the lower percentage of flowering trees, as well as the lower mean number of flowers per tree in the first-bloom year. During the second year, no difference in that trait was established between the variants tested. The yield obtained from the rapidly produced trees showed no significant difference as compared to those of the control and the older micropropagated trees. The least fruit production, both from all vegetations and as averaged over the period, was obtained from the trees budded on the clonal rootstock. Fruit quality, expressed as mean fruit weight, did not significantly differ between the variants and correlated with stone weight. | |
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