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To evlaute of mutant lines as suitable cultivars in normal statues in terms of yield stability, a randomized complete block design with three replications and in three locations (Amol, Goldasht, Choparsar) were caried out in the during two cropping years of 2018 and 2019. Ten genotypes, that is, 8 mutant lines includung obtained from the seventh generation in the preliminary experiment (M8), With Tarom Mahali and Shiroodi cultivar was same plan in all three locations. Transplanting in the main land was carried out simultaneously in all three areas on 9 May. The plot size was 3 × 4 m and the seedlings were transplanted in the form of 3 to 4 seedlings per hill with a density of 25 × 25 cm. Crop care was similar for all three areas. The characteristics of plant height, 50% days to flowering, panicle number per hill, panicle length, number of filled, empty and total grains, yield and a few of quantity and quality of grains were measured. The results showed that mutants 3216 and 1117 had the highest performance stability based on Eberhart-Russell model and Finley and Wilkinson model. With the exception of genotypes 3216 and 3200, the other mutants were earlier maturity than the Tarom Mahali variety. The highest weight of 1000 seeds belonged to mutant number 1117. Milling recovery and grain elongation ratio in line 1117 in Amol was higher than other genotypes. The percentage of stem borer damage, leaf blast and leaf sheath disease among the mutants were 1-5 at vegetative growth stage.Key words: Stability, Milling recovery, Rice Mutant, Yield,
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