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variety resistance

Catalogue: Ground Cover
Ms Ganesalingam applied biometric techniques to analyse seven years of national canola blackleg resistance trial data, providing what her supervisor at the University of Western Australia, Professor Wallace Cowling, describes as a "remarkable improvement" in the stability of the analysis... With the long-term analysis over seven years, Aanandini found that some varieties have stable variety resistance ratings," says Professor Cowling. ".. By using the latest MET analysis, Aanandini has shown that large GxE interactions occur in canola blackleg disease across sites over the years but this GxE can be modelled to improve the analysis and thereby improve our understanding of blackleg resistance in canola varieties," she says. "..
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Catalogue: GRDC Updates
Net blotches (Pyrenophora teres f. teres and P.t. f. maculata) remain the major diseases of barley in the northern region... While net form net blotch (P.t. f. teres) can be the more devastating disease, resistance to the disease is present in several of our leading varieties... Seed harvested from crops heavily infected with net form net blotch should not be retained for sowing...
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Catalogue: GRDC Factsheets
When faced with foliar fungal diseases in cereals, control and damage limitation strategies need to be tailored to the rainfall region, variety resistance status and the disease... Foliar fungal diseases of wheat and barley, such as stripe, leaf and stem rust as well as powdery mildew, can result in substantial losses in all but resistant varieties if left unchecked (Figure 1)... yield increases of 56 per cent have been obtained from GS71 (watery ripe stage) applications in research conducted in WA...
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Catalogue: GRDC Factsheets
When faced with foliar fungal diseases in cereals, control and damage limitation strategies need to be tailored to the rainfall region, variety resistance status and the disease... Foliar fungal diseases of wheat and barley, such as stripe, leaf and stem rust as well as powdery mildew, can result in substantial losses in all but resistant varieties if left unchecked (Figure 1)... yield increases of 56 per cent have been obtained from GS71 (watery ripe stage) applications in research conducted in WA...
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Catalogue: GRDC Factsheets
When faced with foliar fungal diseases in cereals, control and damage limitation strategies need to be tailored to the rainfall region, variety resistance status and the disease... Foliar fungal diseases of wheat and barley, such as stripe, leaf and stem rust as well as powdery mildew, can result in substantial losses in all but resistant varieties if left unchecked (Figure 1)... yield increases of 56 per cent have been obtained from GS71 (watery ripe stage) applications in research conducted in WA...
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Catalogue: Ground Cover
The shift in a variety's response to rust is actually caused by a change in the pathogen that causes the disease... Graphic representing the extent to which a variety's response to rust disease changes when a new pathotype appears Figure 1 The extent to which a variety's response to rust disease changes when a new pathotype appears depends on the nature (ASR or APR) and number of resistance genes it carries... Having both the genes means a pathotypic change can result in a slight increase in susceptibility, which occurs when the ASR gene is overcome by a new pathotype, but the APR gene is still effective in providing back-up resistance ( Figure 1 )...
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