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Abstract
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The present study was conducted in 2021 to evaluate the response of promising winter oilseed rape genotypes to the application of essential amino acids in low-salinity lands. It was executed at the Research and Education Center for Agriculture and Natural Resources of East Azerbaijan. The experiment was implemented as a split-plot based on a randomized complete block design with three replications. The main plots included foliar application with a mixture of 17 essential amino acids at two levels: no application and application. The subplots consisted of 24 promising oilseed rape genotypes that were developed through hybridization and sourced from the Seed and Plant Improvement Institute in Karaj. The results of the experiment demonstrated that the application of amino acids had a significant effect on various variables, and there were significant differences between genotypes in terms of these variables. However, these two treatments did not have a significant interactive effect on each other. The combined application of amino acids led to improvements in growth, yield components, seed yield, and consequently, oil yield in response to salinity. On average, it increased the seed yield and oil yield by 2470 and 1141 kilograms per hectare, respectively. Based on the cluster analysis diagram, genotypes 2, 10, 1, 4, 6, 20, 22, and 3 formed the weakest group in terms of the variables examined. Genotypes 7, 14, 19, and 24 exhibited the highest number of seeds per silique, seed yield, and oil yield and are recommended for planting in similar or higher salinity areas, provided that further experiments are conducted.
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