Yield Performance of Rice Genotypes under Salinity Stress and the Selection of Primary Breeding Sources

This study evaluated the adaptability of rice genotypes to the sulfate-chloride saline soils of the Khorezm region. Under severe chloride salinity (Cl > 0.2%), a sharp decline in grain yield (GY) and total grain number per panicle (TNG) was observed across all varieties. Although the Gigant variety achieved the highest yield (80.2 c/ha) and 1,000-grain weight (33.0 g) in the control group, its yield plummeted to 8.6 c/ha under stress conditions. Conversely, the Manzur (46.1-52.8 c/ha) and Yo‘ldosh (47.9-52.7 c/ha) varieties demonstrated high adaptability and are recommended as primary genetic sources for cultivation in saline fields.