Abstract
The paper presents the results of assessing the resistance of 14 maize hybrids to a negative temperature shock (NTS) of -4°C for 16 hours. The germination and growth seedlings parameters of maize hybrids were studied. Germination of maize seeds at optimal temperature of 26°C for 5 days was used as a control, and pretreatment of maize seeds with NTS followed by germination and subsequent growth at 26°C for 5 days was considered experimental. Pretreatment of maize seeds with NTS made it possible to identify and evaluate the primary resistance of each hybrid to stress, and according to the degree of constitutive frost resistance of each hybrid, the distribution and classification of the studied hybrids into 3 zones was carried out, including hybrids with high, medium and low frost resistance. Also, the effect of NTS on the morpho-physiological traits of the maize seedlings are shown.
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