Evaluation of yield components, seed yield, and oil content of promising winter oilseed rape genotypes in response to the foliar application of essential amino acids in low-salinity lands around Lake Urmia

Articles in Press

Document Type : Research Paper

Authors

1 Department of Agronomy and Plant Breeding, Faculty of Agriculture, Azarbaijan Shahid Madani University, Tabriz, Iran.

2 Crop and Horticultural Science Research Department, East Azarbaijan Agricultural and Natural Resources Research and Education Center, AREEO, Tabriz, Iran.

Abstract

Objective: 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.
Methods: It was performed at the East Azerbaijan Agricultural and Natural Resources Research and Training Center, Tabriz, Iran. The experiment was implemented as a split-plot design based on randomized complete blocks with three replications. The main plots included foliar application with a mixture of 17 essential amino acids at two conditions: without amino acids, and with amino acids. The subplots consisted of 24 promising oilseed rape genotypes that were developed through hybridization which were obtained from the Seed and Plant Improvement Institute, Karaj, Iran.
Results: The results demonstrated that the application of amino acids had a significant effect on seed yield and most yield components. There was also a significant difference among the genotypes concerning the measured variables. However, there was no significant interaction between these two factors. The combined application of amino acids improved the plant height, number of siliques per plant, silique growth rate, number of seeds per silique, seed yield, and oil yield of oilseed rape genotypes in the saline lands near Lake Urmia, Iran. On average, it increased the seed yield and the oil yield by 2470 and 1141 kilograms per hectare, respectively. Based on the cluster analysis, genotypes 7, 14, 19, and 24 (group 4) exhibited the highest number of seeds per silique, silique growth rate, seed yield, and oil yield. Path analysis revealed that the number of siliques per plant, silique growth rate, the number of seeds per silique, and 1000-seed weight were the main components of the seed yield in oilseed rape.
Conclusion: The foliar application of amino acids led to an increase in growth, yield components, seed yield, and oil yield under salinity stress. There was also a significant diversity in seed yield, its components, and oil yield among the oilseed rape genotypes studied. Based on the cluster analysis, the genotypes in group 4 (7, 14, 24, and 19) demonstrated the highest values concerning seed yield and some of the yield components, and may be recommended for planting in similar salinity areas, provided that further detailed experiments are conducted. 

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Main Subjects

References

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Journal of Plant Physiology and Breeding

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Available Online from 31 December 2024

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