Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 56 2 2025 06 22 Evaluation of Yield Potential and Phenotypic and Genetic Relationships of Traits Affecting White Sugar Yield in New Foreign Genotypes of Sugar Beet Evaluation of Yield Potential and Phenotypic and Genetic Relationships of Traits Affecting White Sugar Yield in New Foreign Genotypes of Sugar Beet 105 120 101559 10.22059/ijfcs.2024.383180.655104 FA Hamze Hamze Sugar Beet Research Dept, Agricultural and Natural Resources Research Center of Hamedan, Agricultural Research, Education and Extension Organization (AREEO), Hamedan, Iran. , Rahim Mohammadian Sugar Beet Seed Institute (SBSI), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran Hamed Mansuri, Sugar Beet Research Dept, Agricultural and Natural Resources Research Center of Hamedan, Agricultural Research, Education and Extension Organization (AREEO), Hamedan, Iran. Journal Article 2024 10 07 To evaluate the phenotypic and genetic relationships of traits affecting white sugar yield, 13 foreign sugar beet genotypes were investigated. Genotypes were assessed using a randomized complete block design with four replications in Karaj and Hamadan stations in the 2022 and 2023 crop years. The results showed that three genotypes F-21374, F-21375, and F-21092 produced the maximum white sugar yield. In two locations, the phenotypic and genetic correlation of white sugar yield with sugar content, white sugar content, alpha amine content, and sugar extraction coefficient was positive and significant. At the same time, it was negative and significant with root sodium and alkalinity content, and molasses sugar percentage. In the Hamadan, root yield, sodium content, and sugar extraction coefficient <br />(R²= 89.99) were the most influential traits of white sugar yield. In the Karaj, sodium content, root yield, and alpha amine content (R²= 96.8) were the most influential traits. In the Hamedan, root yield, sodium content, and sugar extraction coefficient had a positive and significant phenotypic and genetic effect on white sugar yield. Root yield and alpha amine showed a direct positive phenotypic and genetic effect in the Karaj. In contrast, sodium content showed a direct negative phenotypic and genetic effect on white sugar yield. Based on the biplot analysis results, the first two factors explained 78.5% and 88.80% of the total data variance in Hamedan and Karaj, respectively. Two genotypes F-21375 and F-21092 were identified as suitable genotypes, and root performance and sodium content were recognized as the most effective traits. To evaluate the phenotypic and genetic relationships of traits affecting white sugar yield, 13 foreign sugar beet genotypes were investigated. Genotypes were assessed using a randomized complete block design with four replications in Karaj and Hamadan stations in the 2022 and 2023 crop years. The results showed that three genotypes F-21374, F-21375, and F-21092 produced the maximum white sugar yield. In two locations, the phenotypic and genetic correlation of white sugar yield with sugar content, white sugar content, alpha amine content, and sugar extraction coefficient was positive and significant. At the same time, it was negative and significant with root sodium and alkalinity content, and molasses sugar percentage. In the Hamadan, root yield, sodium content, and sugar extraction coefficient <br />(R²= 89.99) were the most influential traits of white sugar yield. In the Karaj, sodium content, root yield, and alpha amine content (R²= 96.8) were the most influential traits. In the Hamedan, root yield, sodium content, and sugar extraction coefficient had a positive and significant phenotypic and genetic effect on white sugar yield. Root yield and alpha amine showed a direct positive phenotypic and genetic effect in the Karaj. In contrast, sodium content showed a direct negative phenotypic and genetic effect on white sugar yield. Based on the biplot analysis results, the first two factors explained 78.5% and 88.80% of the total data variance in Hamedan and Karaj, respectively. Two genotypes F-21375 and F-21092 were identified as suitable genotypes, and root performance and sodium content were recognized as the most effective traits. https://ijfcs.ut.ac.ir/article_101559_ef6185d399b0d34e5e94875ce11690ce.pdf