Evaluation of Soybean Genotypes Response to Water Deficit Stress in Terms of Agronomic Characteristics and Grain Yield | ||
| به زراعی کشاورزی | ||
| Articles in Press, Accepted Manuscript, Available Online from 29 April 2024 PDF (1.65 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22059/jci.2024.365265.2846 | ||
| Authors | ||
| Jahanfar Daneshian* 1; farnaz shariati2; NADIA SAFAVI FARD3 | ||
| 1Professor, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran | ||
| 2Assistant professor, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran. | ||
| 3Ph. D of agronomy, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran. | ||
| Abstract | ||
| Objective: Selection of soybean cultivars that have a higher grain yield in water deficit conditions, reduces the damage to soybean producers. Methods: The response of soybean genotypes to water deficit stress was investigated in terms of agricultural characteristics and grain yield in Karaj (Iran), during two years. The experiment was carried out as a split plot based on randomized complete block design in three replications. Therefore, three levels irrigation (irrigation after 50 (control), 100 (mild stress) and 150 mm (severe stress) evaporation from evaporation pan, Class A.) as a main plot and 10 soybean genotypes as a sub-plot. Results: The results showed that mild and severe stress caused to decreased node number and inter-node compared to control irrigation. In control irrigation, the highest grain yield obtained from Saba (the early cultivar) 2585 kg/ha, with the highest seed number m2. Early genotypes had the highest grain yield in control irrigation, and their grain yield decreased significantly with increasing stress intensity. So that the grain yield of Saba cultivar was reduced in mild and severe stress, 32 and 59%, respectively, compared to control irrigation. In stress conditions, the late genotypes had the highest grain yield and water deficit stress caused to a slight decrease in their grain yield. In mild and severe stress, Williams×A3935 (the late line( had the highest grain yield and protein yield, respectively. Conclusion: In control irrigation, the Saba cultivar and in stress conditions (mild and severe) Williams×A3935 line is recommended in karaj and similar climates (moderately cold region). | ||
| Keywords | ||
| Drought; Growth stage; Harvest index; Protein yield; Yield components | ||
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