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wheat line

Catalogue: GRDC Media
After the plants have grown for 18 weeks, the nematodes are extracted from the soil and roots, and counted under a microscope to determine which plant lines have reduced nematode multiplication... Root-lesion nematodes (RLN) are considered most likely endemic to the Fertile Crescent region in the Middle East where wheat originated some 8,000 years BCE. From there, RLN probably spread around the world with grain cultivation across North Africa, Europe, America, and finally Australia... "We realised the resistances that aren't available in commercial wheats, do exist in their ancient ancestors," says Professor John Thompson, Crop Nematologist at University of Southern Queensland' who supervises the GRDC-funded wheat pre-breeding program into genetic options for RLN control...
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Catalogue: GRDC Media
After the plants have grown for 18 weeks, the nematodes are extracted from the soil and roots, and counted under a microscope to determine which plant lines have reduced nematode multiplication... Root-lesion nematodes (RLN) are considered most likely endemic to the Fertile Crescent region in the Middle East where wheat originated some 8,000 years BCE. From there, RLN probably spread around the world with grain cultivation across North Africa, Europe, America, and finally Australia... "We realised the resistances that aren't available in commercial wheats, do exist in their ancient ancestors," says Professor John Thompson, Crop Nematologist at University of Southern Queensland' who supervises the GRDC-funded wheat pre-breeding program into genetic options for RLN control...
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Catalogue: GRDC Media
DAFWA wheat agronomy project manager Christine Zaicou-Kunesch with Richard Quinlan, of Planfarm, and Woongoondy grower Gerard Rowe at the GRDC-funded RCSN early sowing wheat trial site at Yuna... Ms Shackley said the trials aimed to determine the grain yield and quality responses of a range of slow, mid and fast-maturing winter and spring wheat varieties when sown in mid-April, compared with more conventional WA wheatbelt sowing times of early and late May... "Most varieties trialled had the highest yields when sown in early May, or the yields were not significantly different between mid-April and early May sowings," Ms Shackley said...
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Catalogue: GRDC Media
DAFWA wheat agronomy project manager Christine Zaicou-Kunesch with Richard Quinlan, of Planfarm, and Woongoondy grower Gerard Rowe at the GRDC-funded RCSN early sowing wheat trial site at Yuna... Ms Shackley said the trials aimed to determine the grain yield and quality responses of a range of slow, mid and fast-maturing winter and spring wheat varieties when sown in mid-April, compared with more conventional WA wheatbelt sowing times of early and late May... "Most varieties trialled had the highest yields when sown in early May, or the yields were not significantly different between mid-April and early May sowings," Ms Shackley said...
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Catalogue: GRDC Final Reports
Technologies developed for the reliable phenotyping of lines and screening of segregating populations for adult plant resistance to leaf, stem and stripe rust in wheat, and leaf rust in barley, using plants grown under controlled environment conditions (temperature and light), will facilitate the more rapid development of new wheat and barley varieties... The new QTL are not linked with unfavourable QTL for malt quality (as was the case with previously documented major QTL conferring grain dormancy in barley) nor with intolerance to heat (as was the case with the mlo source of resistance to powdery mildew)... Novel QTL identified in barley need to be evaluated in populations with higher levels of recombination to validate QTL effects in different backgrounds, and to identify markers more closely linked to these QTL...
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Catalogue: GRDC Media
Highly vigorous wheat lines have been developed which can produce up to double the biomass of commonly grown varieties by the early tillering stage, effectively shading out weeds... Increased root growth also enables the wheat to out-compete weeds for water and nutrients... The best of the competitive lines grown at Eradu yielded 3.4 tonnes per hectare, compared with 3.5t/ha for Magenta , the top yielding commercial line...
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Catalogue: GRDC Media
Wheat's variable tolerance to shade could be the key to fast-tracking the identification of varieties which can withstand drought, frost and heat, without incurring big yield losses... " the new findings strengthen evidence that wheat's 'light sensitivity' is genetically variable, and linked to its ability to tolerate environmental stresses during the reproductive stage, when grain yields are particularly vulnerable," Dr Dolferus said... "Using screening methods which involve shading of plants is much easier and cheaper than traditional screening methods used to identify plants tolerant to drought, frost and heat...
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Catalogue: GRDC Media
Wheat infected with crown rot.. Prof. Sutherland said the first step in finding a solution was identifying lines of wheat with significantly better resistance these were five low-yielding, unadapted wheat germplasm that did not grow well in Australian conditions... "The aim then was to get this resistance into lines of wheat adapted to Australia possessing other traits that farmers require," Prof. Sutherland said...
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Catalogue: Ground Cover
Diagnostic advances help shut down costly wheat defect.. Many scientists were sceptical when Dr Daryl Mares reported a wheat quality defect that could cause low falling number in the absence of pre-harvest rainfall... Dr Mares and his research group - Dr Kolumbina Mrva, Margaret Pallotta, Dr Klaus Oldach and Dr Judy Cheong - continue their role as lead protagonists in the fight to detect LMA before new wheat varieties reach Australian paddocks and cause the downgrade of otherwise normal-looking grain...
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Catalogue: Ground Cover
Charles Sturt University PhD student Felicity Harris has been investigating why winter wheat varieties produce less early season growth than main-season or spring wheat varieties... The development of wheat varieties with vigorous early season growth would go a long way towards helping boost the profitability of many of Australia's mixed farms where cereal crops are grown for grazing and grain... In her work with FarmLink Research and on her family's farm, Ms Harris had observed that winter wheats tend to have low early vigour, but she wanted to understand why and test this with replicated trials over several years...
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