ISSN:
1573-5060
Keywords:
Hordeum vulgare
;
cultivated barley
;
Hordeum leporinum
;
barley grass
;
Rhynchosporium secalis
;
scald
;
pathogenic variation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The pathogenicity of 182 single spore isolates of Rhynchosporium secalis from Hordeum leporinum and 94 isolates from H. vulgare collected from throughout southeastern Australia was tested on 15 barley varieties, each having different combinations of resistance genes. Forty five percent of the barley grass isolates were pathogenic on 5 or more varieties but only 6% of the cultivated barley isolates attacked this range of varieties. On the basis of reaction type 20 different pathogenicity groups were recognised, with barley grass isolates being classified into 19 and the cultivated barley isolates into 5, four of which were the same as the barley grass isolates. Numerical analysis of data on leaf area damage inferred 33 groups, 24 of which were unique to barley grass isolates, two to cultivated barley isolates and 9 common to both groups. There was as much variation in pathogenicity among single spore isolates from the same lesion as between isolates from different lesions collected from the same or different locations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00023164
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