Evaluation of different sources of resistance for breeding powdery mildew resistant grapevine varieties

The appearance of resistance to powdery mildew was investigated on seedling progenies of interspecific crossings. Hybrids of American and East-Asian wild species and one Vitis vinifera variety (Janjal kara) were used as source of resistance in the crossings. The resistance of foliage and of berries...

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Bibliographic Details
Published inInternational journal of horticultural science Vol. 5; no. 1-2
Main Author J. Korbuly
Format Journal Article
LanguageEnglish
Published University of Debrecen 24.05.1999
Subjects
genetics
heritability
screening
statistics
Uncinula necator
Vitis
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Summary:The appearance of resistance to powdery mildew was investigated on seedling progenies of interspecific crossings. Hybrids of American and East-Asian wild species and one Vitis vinifera variety (Janjal kara) were used as source of resistance in the crossings. The resistance of foliage and of berries were tested in the field at the time of vintage. The degree of resistance was ranked into six classes. In American and Asian hybrid derivatives there were few highly resistant progenies, but in the hybrids of Janjal kara variety more than 90 % of the progenies proved to be highly resistant to powdery mildew. According to the distribution of classes of resistance in the populations the resistance of American and Asian sources are mostly influenced by additive gene affects. The resistance of Janjal kara seemed to be mono or digenic. No close correlation was found between the powdery mildew resistance of the foliage and that of the berries.
ISSN:1585-0404
2676-931X
DOI:10.31421/IJHS/5/1-2/19