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Gains in barley heat tolerance prove possible
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-26T09:00:00+11:00Heat stress can mean barley crops are downgraded from malting to feed quality. This impacts price, resulting in up to a 30 per cent drop in profit. When combined with drought stress, heat is the largest factor in both the loss of quality premiums and yield reductions. Professor Chengdao Li leads a GRDC investment that investigated the genetic response to heat stress in barley and the potential to increase the crop’s tolerance levels.
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Canola heat tolerance genetics discovered
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-25T09:00:00+11:00Novel heat tolerance and heat stress recovery traits have been discovered in a coordinated and multidisciplinary analysis of a diverse canola population
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A new framework for chickpea heat tolerance
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-22T09:00:00+11:00Chickpea is Australia’s most significant pulse crop but faces considerable challenges for future expansion. High temperatures in many growing regions hinder chickpea adaptation and there is a notable lack of genetic diversity for breeders to use to overcome this constraint. To address these challenges, GRDC has invested in a new project spearheaded by the University of Queensland that aims to accelerate the development of chickpea varieties that can withstand higher temperatures.
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Yield advantages with new chickpea heat tolerance traits
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-21T09:00:00+11:00High temperatures during chickpea’s critical flowering and pod-fill period reduce seed size and number. To mitigate these yield losses, a proof-of-concept study searched for novel heat-tolerance traits within the broader chickpea gene pool. The project is headed by Professor Richard Trethowan, director of the Plant Breeding Institute at the University of Sydney.
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Modelling to help manage temperature stress
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-20T09:00:00+11:00The ability to zone paddocks relative to susceptibility to heat and frost damage is under development using data-driven modelling to help growers better manage climate constraints
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New ways to select for heat tolerance in wheat
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-19T09:00:00+11:00Trait discovery work in wheat has identified new indicators for heat tolerance and efficient selection technology for use by breeders for rapid progression into new varieties and on to Australian paddocks
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Unravelling the biochemistry of heat response
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-18T09:00:00+11:00A project was launched in 2023 to subject heat-responsive biochemical pathways in wheat to rigorous analysis. The aim is to scan for new opportunities to provide wheat breeders with tools to select for more heat-tolerant wheat germplasm.
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Photosynthesis the key to new heat-tolerant crops
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-15T09:00:00+11:00The ability to mass screen wheat for differences in photosynthesis efficiency at high temperatures is being developed to give breeders a vital new selection tool
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AI fast-tracking wheat heat tolerance gains
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-14T09:00:00+11:00Increasing temperatures and variable environments are challenging. Effective field-based strategies for assessing heat tolerance phenotypes are needed. GRDC scholar Rebecca Thistlethwaite at the University of Sydney has developed a strategy that uses a three-tiered approach.
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Fostering high-impact innovation in heat tolerance
Supplement: High yields in a hot climate, September-October 2024 - 2024-11-08T09:00:00+11:00GRDC has long maintained an extensive investment portfolio looking to improve the heat tolerance of grain crops. Extended periods of high temperature stress and short periods of heat shock (greater than 30°C) during flowering and seed filling are also a significant constraint for canola, with an estimated annual economic loss of more than $400 million.