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The candidate promising lines are compared with newly releasedand popular local varieties based on morphological and physiological traits, and the new line is added to the Iran's national list as a new variety based on the criteria for Distinctness, Uniformity and Stability (DUS) in the desired traits. The preparation of registration and identification of popular rice cultivars in order to prepare the Iran's national list and also the collection is carried out using the morphological and physiological traits according to in the national rice guidelines. Therefore, 10 promising lines and 3 newly released (Tisa, Toka and Tolu) rice varieties along with Hashemi as a popular local rice variety (in total 14 genotypes) were evaluated using a Randomized Complete Block Design (RCBD) with three replications at the Rice Research Institute of Iran (RRII-Rasht) in years 2021-2023. Sixty morphological and physiological traits were measured based on observational evaluation for all genotypes in the test for Distinctness, Uniformity and Stability. In the first step, the genotypes were divided in to the three groups based on thier grain guality traits and quantitative characteristics, as in first group, RI400GK2, RI4007Tr lines and Tisa and Tolu cultivars, in second group RI4003, RI8400501, RI400K4, RI400K96, RI400GK1 lines and Toka and Hashemi cultivars and the RI400015, RI4007, and RI400TH1 lines were located in the 3rd group. The lines and cultivars within each group were also distinguished from each other based on other qualitative and semi-qualitative traits, and in this way, the 14 studied genotypes were completely separated from each other through the percentage of amylose content, Flag leaf: attitude of blade and grain width. Based on these results, RI4008501 line and Hashemi, as well as Toka cultivar and RI400K96 line, and Tolu cultivar and RI400GK2 line are distinguished from each other only by the grain width trait, and no other quantitative trait played a role in their distinctness. By performing analysis of variance and comparing the mean of quantitative traits with the Least Significant Difference (LSD) test and cluster analysis, the differentiation of genotypes was studied. The results of simple variance analysis showed that the studied genotypes have a significant difference at the 1% probability level in terms of 7 quantitative traits.
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