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new gene

Catalogue: Ground Cover
Scientists in Perth have found a novel way to control two costly and damaging fungal diseases of wheat - but in a way that will not involve any new chemicals or added costs to growers... The fungi reactivate and recruit these obsolete genes, using them, in effect, as 'zombies', to damage the plant so the fungi can invade and infect the leaves, subsequently reducing photosynthesis and grain yield... Researchers have found no yield penalty associated with disease insensitivity (arising from the elimination of Tsn1 from cultivars) as there can be with varieties bred with disease resistance, which is why some growers still risk growing susceptible varieties...
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Catalogue: Ground Cover
Dr Marcroft says the spores that attack crops each year are produced on canola stubble in the previous summer and autumn... "When you sow a canola variety, you will inevitably be selecting for blackleg spores that are able to attack the resistance genes in that variety," Dr Marcroft says... "The project has just started but we have tested the screening method in a shade house in Horsham and it works," Dr Marcroft says...
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Catalogue: Ground Cover
Middle: Leaf rust pustules are smaller than stem rust and rarely appear on the back of the leaf... It is unlikely that all growers will apply adequate fungicide at the first sign of rust and keep the infection sufficiently under control so that the disease will not spread to neighbouring properties... Equally it is unrealistic to expect that all growers will sufficiently monitor or destroy volunteers growing between seasons to ensure that those volunteers will not harbour rust infections which may be responsible for starting new epidemics...
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Catalogue: Ground Cover
A new cache of rust-resistance genes has been identified in durum wheat.. The new sources will increase diversity for rust resistance in modern varieties - By Dr Gio Braidotti.. Arthur Ernest Watkins may not have the posthumous name recognition of William Farrer but is belatedly leaving his mark on the world, thanks to a treasure trove of rust-resistance genes he left to wheat scientists and a modern world desperate to renew rust defences in wheat, especially against stem rust...
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