GROWTH AND YIELD OF APPLES ON NEW CZECH DWARFING ROOTSTOCKS

M 9 rootstock is commonly used in new apple orchards planted in the Czech Republic but growers in many cases are not satisfied with the performances of the trees.
For these reasons new rootstocks were bred in this country.
Orchard characteristics of these rootstocks have not yet been fully noted.
This study was conducted in order to test new dwarfing apple rootstocks from the Czech Republic (J-TE-E, J-TE-F, J-TE-G, J-TE-H, J-OH-A) and from Germany (M 9-751, M 9-984). In this trial, the following scion cultivars were used: ‘Rubin’, ‘Jonagold’, ‘Melrose’ and ‘Florina’. The experimental orchard was planted in the spring of 1992. The following parameters were monitored: total yield, yield efficiency, tree vigour (according to trunk cross section area) and suckering.
The highest cumulative yield (1993-2002) per tree for ‘Rubin’ was found on M 9-984 and J-TE-E. The cultivars ‘Jonagold’ and ‘Melrose’ had the highest yields on M 9-984 and M 9-751 while ‘Florina’ was the most productive on M 9-751 and J-TE-H. J-TE-H and M 9-751 gave the highest induced vigour for all scion cultivars.
The smallest trees were observed with J-TE-G, J-TE-F and J-OH-A. The highest yield efficiencies were obtained on the most dwarfing rootstocks J-TE-G and J-TE-F. The rootstocks J-OH-A, J-TE-E and J-TE-F produced many suckers.
The anchoring of trees on J-TE-H was satisfactory.
All other rootstocks required a support.

XI Eucarpia Symposium on Fruit Breeding and Genetics

J. Kosina

cultivars, rootstock, suckering, productivity, induced vigour

https://doi.org/10.17660/ActaHortic.2004.663.175