To assess the performance of F1 hybrids and their parents of rice (Oryza sativa L.) at different levels of salt stress under the hydroponic condition

Abstract

World is facing the foremost challenges of abiotic stresses in agriculture among which salinity is one of the disastrous factors towards rice production. Rice is a salinity sensitive crop; however, the level of salinity varies in different cultivars. Hence, for this scenario salt tolerant genotypes are required to enhance the productivity of rice, to overcome the demand of world’s population. The present research was carried out to evaluate the performance of fifteen F1 hybrids and their parents of (Oryza sativa L.) at different intensities of salt stress under hydroponic condition (greenhouse) at Plant Physiology Division, Nuclear Institute of Agriculture (NIA), Tandojam during Kharif season of 2021 by using Factorial Designin (RCBD). Based on the performance of, by using three different treatments of salt stress such as (T1 = control 0.0 dS m^-1, T2 = 6 dS m^-1 and T3 = 8 dS m^-1NaCl). During experiment, morphological attributes under observations were, root length(cm), shoot length(cm), root fresh weight(g), shoot fresh weight(g) and root, and shoot dry weight(g). Fifteen F1 hybrids and six parents were assessed for various morphological traits under various salt treatments at hydroponic condition and showed significant variation for genotypes, treatments and interaction at P<0.01 probability under both saline stress T2 = 6 dS m^-1 and T3 = 8 dS m^-1NaCl. The superior hybrids as (KSK-133xHHZ-10-SAL-DT1 DT1) (90.38cm), (RST-177x Kharagnjia), (HHZ-10 SALxGML-498), (HHZ-10-SAL DT1 DT1x Kharaganjia) and (FL-478xKharangania) observed short stature height, more number of grains panicle^-1 and seed yield plant^-1than their parents under both T2 = 6 dS m^-1 and T3 = 8 dS m^-1 conditions of NaCl which indicate high tolerability of genotypes. The crosses KSK-133 x RST-177, HHZ-10-SAL x FL-478, HHZ-10-SAL x FL-478, GML-498 x Kharaganjia, HHZ-10-SAL x FL-478, KSK-133 x RST-177, KSK-133 x HHZ-10-SAL DT1 DT1, RST-177 xHHZ-10-SAL DT1 DT1, RST-177 x GML-498 exhibited greater performance in morphological and yield associated traits in control and saline stress, respectively. Hence, FL-478 x GML-498, KSK-133 x 44 RST-177, RST-177 x FL-478, HHZ-10-SAL x GML-498, GML-498 x Kharaganjia, KSK- 133 x GML-498, HHZ-10-SAL x Kharaganjia, RST-177 x Kharagnjia and HHZ-10-SAL x GML-498 can be recommended as salt tolerant genotypes and can be used for further breeding program. Therefore, such hybrids and parents with potential yield and salt tolerance are required to provide healthy rice genotypes to grown under saline fields which may acquire better yield production

Keywords: F1 Hybrids; Hydroponic; Panicle; Parents; Salinity

http://dx.doi.org/10.19045/bspab.2023.120091