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- Title
Reaction of European spring barley varieties to a population of the net blotch fungus.
- Authors
Jørgensen, J. Helms; Bech, C.; Jensen, J.
- Abstract
About 320 European spring barley varieties and about 40 spring barley lines were tested in the field for reaction to a local population of the spot form of the net blotch fungus Pyrenophora teres forma maculata with the imperfect stage Drechslera teres. The European barley varieties showed a wide range of disease reactions, from nearly resistant to very susceptible. At least three groups of genetically related barley varieties could be distinguished: (1) ‘Agneta’ and ‘Clermont’, (2) ‘Nordal’ and ‘Arve’, and (3) ‘Tellus’, ‘Pamina’, ‘Albert’ and ‘Birka’. The parentages of these three groups of barley are mutually distantly related and may thus constitute three different sources of resistance to the pathogen population used. The range of disease reaction is similar in varieties from different European countries but it differs among different breeding stations. The relatively high level of resistance is fairly uniformly distributed in contemporary barley varieties all over most of Western Europe. Over time, from about 1830–1982, the average level of resistance varied around 4.0 (scale value) (from 2.8 to 4.8). However, since about 1940 the variation in disease reaction has become much wider (from 1.8 to 6.9) for unknown reason(s).
- Subjects
BARLEY varieties; PYRENOPHORA teres; BARLEY net-spot blotch disease
- Publication
Plant Breeding, 2000, Vol 119, Issue 1, p43
- ISSN
0179-9541
- Publication type
Article
- DOI
10.1046/j.1439-0523.2000.00455.x