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Catalogue: GRDC Final Reports
The project has focused on monitoring blackleg populations for virulence by exploiting markers for avirulence (Avr) genes in the fungus, which are complementary to resistance (Rlm) genes in the plant... Selection pressure acting on one avirulence gene can also influence other avirulence genes that are closely linked... Only two genes (LmCys2 and AvrLm6) have mutations in attacking isolates and are considered candidate genes...
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Catalogue: Ground Cover
Voyage into barley's genetic 'inner-space'.. To help ensure the new detail is given a useful role, a novel way was devised to present the data - to depict the barley genome as an integrated 'gene space' in which the order and structure of most of barley's 32,000 genes are placed in a meaningful physical and genetic framework... Overall, barley is the second most important crop in Australian agriculture...
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Catalogue: Ground Cover
A better understanding of the canola genome should deliver a major advance in improved varieties, including the eventual development of blackleg resistance.. The first project has delivered some 500 DNA markers tagging locations in the canola genome controlling blackleg resistance under Australian growing conditions... "The results confirm earlier observations that blackleg resistance sources coming out of Canada and France are not really working in Australia," Dr Cogan says...
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Catalogue: GRDC Final Reports
In the project, we crossed a number of durum varieties to bread wheat lines, which are partially resistant to CR. Subsequent generations from these crosses were tested for their resistance to the disease in infected fields... The project has demonstrated that partial CR disease resistance present in hexaploid wheat lines can be transferred into durum wheats... The aim of the project was to transfer genetic loci linked to CR resistance in bread wheats, into durum wheats and to test the performance of derived lines in field trials...
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Catalogue: GRDC Final Reports
Sclerotinia stem rot and blackleg are the two major disease constraints to canola production in Australia... After identifying the genes, they will be functionally analysed by mutation (or silencing) and their role in disease will be determined... A link to more recent research can be found at http://www.botany.unimelb.edu.au/blackleg/index.html..
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Catalogue: GRDC Research Summaries
" Novel Approaches to control fungal diseases of oilseed Brassicas in Australia.. The major disease constraints to Australian canola production are blackleg caused by Leptosphaeria maculans, and stem rot caused by Sclerotinia sclerotiorum... The fungus comprised all isolates cultured from stubble of canola-quality juncea...
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Catalogue: GRDC Final Reports
The mechanisms that the fungi use to infect plants are poorly understood... Genes in repetitive-rich regions can be lost and gained readily, which may account for the short period of time in which populations of the fungus overcome resistance conferred by single genes e.g. two years for sylvestris-derived resistance... Other genes identified by this approach include those encoding histones, thiolase, 'hypothetical' proteins, as well as proteins involved in cell wall structure and integrity...
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Catalogue: GRDC Final Reports
Genetic diversity in Australian canola and implications for crop breeding for changing future environments... Field Crops Research 104:103- 111... Variation in fatty acid composition among genetically homogeneous seeds of canola (Brassica napus), and implications for genotypic selection based on single seeds...
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Catalogue: GRDC Media
Sequencing of the genome of the blackleg fungus informs canola industry research The ground-breaking sequencing of the blackleg fungus genome is helping to direct ongoing canola industry research efforts... The sequencing of the genome of the blackleg fungus by a team of Australian and French scientists, announced earlier this year, is already having a positive impact on the canola industry through development of new approaches to predict disease outbreaks... Grains Research and Development Corporation (GRDC) Manager for Crop Protection, Dr Rohan Rainbow, says sequencing of the genome of the blackleg fungus will help researchers understand the fungus' rapid and potentially devastating genetic evolution and improve opportunities to explore alternate disease control mechanisms...
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Catalogue: GRDC Research Summaries
" Novel Approaches to control fungal diseases of oilseed Brassicas in Australia.. The major disease constraints to Australian canola production are blackleg caused by Leptosphaeria maculans, and stem rot caused by Sclerotinia sclerotiorum... The fungus comprised all isolates cultured from stubble of canola-quality juncea...
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