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Heat stress tolerance of wheat

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The SAGIT funded project involves using a controlled environment assay that is run at Roseworthy, to identify and quantify the level of heat stress tolerance in current varieties, advanced breeders lines and exotic lines, as well as using 'gene mapping', to genetically dissect and understand the key sources of tolerance identified to date... Figure 1 illustrates the fertility and grain size response for a subset of varieties to heat stress in the controlled environment assay. In general heat stress causes a significant (p<0.05) reduction in both grain number and grain size, the two key yield components and ultimately grain yield... A subset of exotic introductions that have been screened for heat stress tolerance in the controlled environment assay, showing diverse levels of adaption...