Mohamed Khattab (1)* , and Youssef Mohamed (1), and Basil Hashish(1)
(1) Department Of Field Crops, Faculty of Agriculture, Tishreen- University, Lattakia , Syria.
(*Corresponding author: Mohamed Khattab, E-mail: khder8716@gmail.com)
Received:14/10/2021 Accepted:6/01/2022
Abstract:
A semi-field research was carried out (in pots) according to the design of random sectors and with three replications in the coastal region (Jableh), and in the laboratories of the Faculty of Agriculture – Tishreen University, where cultivation was carried out on 5/15/2021 in order to study the effect of full irrigation (100%) and water stress ( 50%) (from the beginning of the flowering phase and the beginning of the fullness of the pods) in 5 genotypes of soybean (Sb335, Sb337, Sb339, Sb342, Sb344) and determining the most drought-tolerant by studying several indicators (the number of days from planting until flowering 50% of the soybean Plants – number of days to maturity – plant height (cm) – leaf content of proline (µg/g) – relative moisture content of leaves % – number of seeds per pod – weight of one seed (g) – number of pods per plant – weight of pods on the plant One (g) – weight of 100 seeds (g) – number of seeds per plant – weight of seeds per plant (g)), to reach the electoral evidence that can be considered as a criterion for high productivity under water stress conditions.Most of the studied traits showed high values of GCV and it was associated with a high heritability, which indicates that these traits were relatively less affected by the environment. Water stress also caused a significant decrease in the studied indicators compared to the treatment of the control in the various studied genotypes, as the genotype Sb 335 was characterized by the lowest percentage of decrease in all the studied traits, while the genotypes Sb 342 and Sb 344 were the most sensitive to stress. Seed yield kg/ha was positively and significantly associated with pod weight (r=0.91**), number of seeds per plant (r=0.92**), and number of pods (r=0.73**). These traits showed high values for GCV and GA % and h2B and thus the possibility of using these indicators as selective indicators to improve seed productivity.
Keywords: soybeans, water stress, proline, genetic variation.
Full paper in Arabic: pdf