Identification of new sources for resistance to powdery mildew in H. spontaneum-derived winter barley lines

Twenty four barley lines derived from the F sub(7) generation of crosses between two winter barley cultivars and different accessions of Hordeum spontaneum Koch collected in Israel were tested against a set of ten European and five Israeli powdery mildew cultures, possessing virulence genes which co...

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Bibliographic Details
Published in:Genetic resources and crop evolution 1996, Vol.43 (1), p.25-31
Main Authors: Kintzios, S, Fischbeck, G
Format: Article
Language:English
Subjects:
cultivars
disease resistance
Erysiphe graminis
Erysiphe graminis f. sp. hordei
Hordeum spontaneum
Hordeum vulgare
Hordeum vulgare subsp. spontaneum
hybrids
strain differences
virulence
wild relatives
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Summary:Twenty four barley lines derived from the F sub(7) generation of crosses between two winter barley cultivars and different accessions of Hordeum spontaneum Koch collected in Israel were tested against a set of ten European and five Israeli powdery mildew cultures, possessing virulence genes which completely match the spectrum of known mildew resistance genes. The comparison of reaction patterns justified the conclusion that new genes for resistance have been conferred from H. spontaneum which also differ from genes previously identified in other wild barley accessions from Israel. Participation in the expression of the resistance reaction of one of the two barley cultivars used in the development of the lines is well documented in some cases. The majority of the lines was found to be highly resistant against all or almost all European isolates, while various kinds of reactions were observed against the Israeli cultures. The effective transfer of novel mildew resistance from H. spontaneum into winter barley confirms similar results with spring barley, indicating natural wild barley populations in Israel as a significant gene pool for yet unexploited mildew resistance in barley.
ISSN:0925-9864
1573-5109
DOI:10.1007/BF00126937