Vol. 12, Issue 8 (2023)

Author(s):
Shubhangi Maraskole, SV Sawardekar, AK Singh, BD Waghmode, AV Mane and MC Kasture

Abstract:
An experiment was conducted in collaboration with the school of water stress management, ICAR-NIASM, Malegaon, Baramati during 2021-2022 to evaluate the rice (Oryza sativa L.) genotypes. 20 rice genotypes were collected from R.A.R.S., Karjat and K.L.R.S., Panvel, including checks. Plants were treated with salt had electrical conductivity of 6 dSm^-1 and 9 dSm^-1, respectively, with control (3 dSm^-1) (Coastal saline soil with no additional salts) during seedling stage. On the basis of visual salt injury symptoms, SES (Standard evaluation score) and STI (Salt tolerance index) were estimated at 6 dSm^-1 and 9 dSm^-1. Among 20 rice genotypes, based on visual salt injury symptoms, SR 3-9, Kala rata, CST 7-1, Damodar, CSR 36, Panvel 1 and Panvel 3 scored 1, suggesting a high degree of tolerance at 6 dSm^-1 and genotypes SR 3-9, Kala rata and CST 7-1 observed a highly tolerance at 9 dSm^-1. However, among the 20 genotypes, the maximum value of salt tolerance index was observed in Kala rata followed by CST 7-1, SR 3-9 and Damodar at both 6 dSm^-1 and 9 dSm^-1 as compared to check as popular cultivars such as FL478 and Karjat 4. This work reveals the potential of rice genotypes to resist coastal salinity up to 9 dSm^-1. The genotypes showed the best performance under saline conditions and can help to identify relevant genes essential to develop salt-tolerant varieties.