INFLUENCE OF GRAFTING TECHNIQUE ON MACROSCOPICAL GRAFT INCOMPATIBILITY SYMPTOMS: COMPARISONS OF CHIP BUDDING AND RING BUDDING

Graft incompatibility shown by many Prunus rootstocks with various apricot cultivars is one of major problem for rootstocks use and improvement.
It is characterized by mechanical weakness at the graft union, which can lead to the breakage of the tree.
Several apricot varieties with varying degree of compatibility were chip and ring budded on Marianna GF 8-1 incompatible plum rootstock and seven years later, macroscopical observations of the graft union were performed.
Even if ring budding led to more tree breakage in the orchard, no difference of expression could be observed at the macroscopical level for the two types of budding techniques.
However anatomical observations revealed great differences of compatibility among the genotypes tested ranging from “perfectly compatible” ones: ‘Stark Early Orange’ and ‘Luizet’ cultivars, to “very incompatible” ones: ‘Moniqui’, ‘Bebeco’, and ‘Canino’ cultivars.

XII International Symposium on Apricot Culture and Decline

F. Gurrieri, G. Olivier, M. Faurobert, J.L. Poëssel

Prunus armeniaca, budding technique, graft incompatibility, graft union structure, apricot

https://doi.org/10.17660/ActaHortic.2006.701.118