ISHS Acta Horticulturae 224: Fruit Breeding
GRAPEVINE BREEDING BY GAMMA RADIATION: RESULTS AND PROSPECTS. |
| Authors: | R. Botta, R. Vallania, G. Me |
| Abstract:
A method to induce mutations by  radiation treatment in 5 cultivars of grape is described.
The treatment increased variability in the comparatively small population allowing the selection of some interesting mutants.
In 'Dolcetto', which shows a tendency to berry drop, no dropping mutants were found as well as some early ripening plants.
Polyploidy, resulting in big berries with a better resistance to Botrytis cinerea, was obtained in 'Barbera'. A 'Delight' mutant was selected for berry size that was bigger than in the control.
Cases of seedlessness were found in 'Queen of vineyards'; berries were sweet and juicy but small sized.
Negative mutations were found: reduction of fertility and very small berries, and types with pigmentation defects in the leaves.
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