1Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia
2Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh
3Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia
4Division of Agronomy, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh
5Division of Plant Breeding, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh
*Corresponding Author: Rakiba Shultana, Division of Agronomy, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh, Email: rakibabrri@gmail.com
#These authors contributed equally to this work as corresponding co-authors.
Online Published on 16 August, 2024.
Worldwide coastal rice growing areas are severely affected by salinity which has become a major constraint to rice production. Salinity is a serious soil problem in rice-growing countries, severely limiting global rice production.
In this study, the seedlings of 21 rice genotypes were tested against seven different levels of salinity concentrations (0.3, 2, 4, 6, 8, 10 and 12 dSm-1) under a hydroponic system in a glasshouse condition at Field 10, Faculty of Agriculture, Universiti Putra Malaysia (UPM). Data on seedling growth and salinity injury of the tested rice genotypes were recorded.
The results showed that Pokkali, FL478 and Binadhan-10 were tolerant at 12 dSm-1; BRRI dhan73, BRRI dhan61, Binadhan-8, BRRI dhan67 and BRRI dhan47 were tolerant at 10 dSm-1; Putra-1 were moderately tolerant at 8 dSm-1 and MR263, MR284, MR211 and MRQ74 were tolerant at 4 dSm-1 and rest of the genotypes were salt susceptible. The lower amount of Na: K and Na: Ca were measured from rice genotypes, Pokkali and FL478 at maximum salinity levels. The promising rice genotypes that were tolerant at 12 dSm-1 would be taken into consideration for a hybridization program to develop a new salt-tolerant rice variety.
Genotype, Na+/K+ ratio, Rice, Salinity, Seedling
