Sharka-Resistant Plum Hybrids and Cultivars from the Plum Breeding Programme at Hohenheim
Hartmann, Walter
Sharka (PPV) is one of the most dangerous viruses in fruit growing. More and more fruit growers are unsatisfied with the resistances or tolerance of plum varieties cultivated today. With the utilisation of the hypersensitive reaction to PPV in breeding we developed ‘Jojo’ as the first absolutely resistant cultivar in the field. Most interesting now is the development of new sharka-resistant cultivars, especially in three points: extension of ripening range, better fruit size, and high fruit quality. In a new breeding programme, we obtained many hypersensitive clones. After testing in different regions, some interesting resistant clones and cultivars were selected and are presented here.
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