FIELD PERFORMANCE OF MICROPROPAGATED PEACH ROOTSTOCKS AND SCION CULTIVARS OF SOUR CHERRY AND APPLE (1)
Field performances of fruit rootstocks and scion cultivars obtained from micropropagation (TC) and from standard propagation (SP) have been investigated.
- Clonal peach root stocks GF 677 and GF 43 - Nursery: TC GF 43 root stocks (1980) were less vigorous. The leaf area of the root stocks and of the scions of the cultivars Springcrest/GF 43 and Flavorcrest/GF 677 were smaller in TC propagated. The final scion growth was superior in TC GF 677 and in SP GF 43 - Orchard: after two years (1983) the differences existing in the nursery disappeared. There were no differences in the cumulative production (1983–85) of the trees on the two types of rootstocks; in the first year of full production (1984) trees on TC GF 677 yielded more fruit, of larger size and earlier ripening.
- Sour cherry - In two cultivars ("Meteor" and "Montmorency"), with the scions planted in January 1982, we compared the orchard performance of TC trees (self rooted) with that of trees grafted on Mazzard seedlings and clonal rootstocks (Colt, CAB 6P and CAB 11E). TC trees of both cultivars did not bloom the year after planting and those of Meteor also in the second year, while grafted trees bore a normal bloom and production. Those grafted on Colt resulted the most productive and the most vigorous. In spite of their lack of production, the TC trees were less vigourous.
- Apple - Starting from January 1981 TC trees of a spur clone of "Golden Delicious" apple were compared with trees of the same clone grafted on MM 106 and MM 111. TC trees were more vigorous than those on clonal rootstocks. For cumulative production (1982–85), TC trees were as productive as those on MM 106 in spite of the fact they came into bearing one year after the trees on clonal rootstocks. In TC trees the crop was concentrated in the upper part of the canopy as occurs in seedlings at the end of their juvenile fase.
Rosati, P. and Gaggioli, D. (1987). FIELD PERFORMANCE OF MICROPROPAGATED PEACH ROOTSTOCKS AND SCION CULTIVARS OF SOUR CHERRY AND APPLE (1). Acta Hortic. 212, 379-390