Selection of Promising Rice Genotypes With High Grain Quality For The Saline Lands of The Khorezm Region, Uzbekistan
Keywords:
Rice (Oryza sativa L.), Salinity stress, Starch, Milling quality, Khorezm oasis, Genotype selectionAbstract
Soil salinity is a major constraint for rice production in the Khorezm region of Uzbekistan. This study aims to identify rice genotypes that maintain superior grain quality and technological stability under chloride-sulfate salt stress. Sixty-seven rice genotypes were evaluated under nine salinity variants (2023–2025). Key biochemical (starch, amylose) and technological (vitreousness, milling recovery) parameters were analyzed to determine adaptive resilience. Salinity stress reduced starch accumulation while increasing amylose content and grain vitreousness. Genotypes LD-2022.2 (Lider) and EP-327-01 proved most stable, maintaining starch levels >80% and rice recovery rates of 64.4–65.8% under high stress. KC-2022.2 exhibited the highest vitreousness (96.4%), significantly reducing grain breakage during processing compared to the standard variety Iskandar. LD-2022.2 and EP-327-01 are identified as highly promising genotypes for the saline lands of the Khorezm oasis, ensuring high market quality and milling efficiency in stress-prone environments.
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