Summary of data from the 1st and 2nd international heat stress genotype experiments
1994
Reynolds, M.P. (Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico). Wheat Program)
The International Heat Stress Genotype Experiment (IHSGE) is designed to look closely at a small number of traits that seem to have potential value as predictors of yield at high temperature. The main objectives of the IHSGE include: 1) basic studies on plant characteristics, 2) developing faster screening methodologies for heat tolerance, and 3) increasing international cooperation. The target environment includes 50 countries currently importing more than 20 million tons of wheat per year. The hot environments studied seem to show some grouping. In particular, a number of sites show reasonable yield correlations with CIMMYT's hot dry environment at Tlaltizapan, Mexico. These are Sudan, India, and Brazil, while Syria and Thailand are clearly the environments most unlike the rest. Two physiological traits, canopy temperature and membrane thermostability, look promising and require further investigation and protocol development if they are to be incorporated into breeding programs
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