New selections of almond, putative rootstocks for peach and almond
1998
Caboni, E. | Monastra, F. (Istituto Sperimentale per la Frutticoltura, Rome (Italy))
Seven almond seedlings (M49, M50, M51, M52, M53, M54 and M55) are under evaluation as rootstocks for peach and almond in the Fruit Tree Institute (ISF) of Rome. 3 (M50, M51 and M55) of the 7 genotypes were used for grafting the peach cultivar Emilia, the nectarine cultivar Nectaross and the following almond cultivars: Supernova, Ferragnes, Tuono and Lauranne. The 3 genotypes showed a good grafting compatibility with both peach and nectarine cultivars. From the results on tree vigour, evaluated measuring the trunk cross-section, it was evident that M50 induced the most vigorous plants, while M51 and M55 induced less vigourous plants. From the rooting results, obtained in vitro, it was evident that M51 has the higher rooting capacity. It was possible to obtain 90 per cent of rooted explants in this clone, without callus formation, using IAA. The most suitable auxin for all the other genotypes was IBA and it was possible to obtain satisfactory results for all the genotypes. M50 rooted less than all the others, in fact, 22 per cent was the maximum rooting percentage obtained. More agronomic evaluations are now in progress in the field, using in vitro cloned material, to reach a complete characterization of all the genotypes.
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