Performance of the apple (Malus domestica Borkh) cultivar Imperial Double Red Delicious grafted on five rootstocks
2008
Sotiropoulos, T.E.,Pomology Inst., Naoussa (Greece)
The performance of the apple cultivar Imperial Double Red Delicious (Imperial D.R.D.) grafted on the following 5 rootstocks: (i) seedling, (ii) M 7, (iii) MM 104, (iv) MM 106 and (v) MM 109 was investigated. The highest yield per tree was recorded for trees on seedling rootstock, while the lowest one for the cultivar grafted on M 7. Production efficiency of Imperial D.R.D. was the highest one when grafted on MM 106 and M 7, intermediate on seedling and MM 104, and the lowest one on MM 109. The highest leaf photosynthetic rate (Pn) was measured for scions grafted on seedling although it was not significantly different from MM 109. Nitrogen concentrations of leaves of the cv. Imperial D.R.D. grafted on M 7 and MM 106 were significantly lower in comparison with the seedling variant. Flesh firmness at harvest, pH of juice at harvest, soluble solids content and titratable acidity at harvest and after four months of storage were not significantly different among the rootstocks.
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