ISHS Acta Horticulturae 279: III International Workshop on Temperate Zone Fruits in the Tropics and Subtropics
PRELIMINARY STUDY ON FORCING OF FLOWERING IN APPLE (MALUS SYLVESTRIS MILL) VAR. ANNA. |
| Authors: | S. Subhadrabandhu, P. Watanawongvijit |
| Abstract:
A study on flower forcing in Anna apple was conducted at Ang Khang Station. Three kinds of shoots of similar length, width and age were selected, they were, 1) one-year-old shoot with terminal bud attached, 2) one-year-old shoot with only lateral buds and 3) shoot with spurs. These shoots were kept for 30 days under 5°C and 10°C as a substitution to winter temperature. After the completion of the treatment, the chilled shoots were grafted onto the apple rootstock. The results showed that the buds (both terminal and lateral) from one- year-old shoots kept at 10°C had a better development to flower than those kept at 5°C. The buds from spurred shoot developed flowers faster if kept at 5°C compared to those kept at 10°C. The numbers of flowers developed from the shoots kept at 5°C and 10°C were not significantly different from similar shoots cut from the trees and immediately re-grafted on to the stock without low temperature treatment, while the buds from those similar shoots left on the tree did not develop flowers. This study was used to provide preliminary information information on forcing apple to flower in the off-season. | |
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