University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 36 1 2026 04 20 Using parametric, non-parametric and SIIG index methods to study the genotype × environment interaction and seed yield stability of new sunflower hybrids Using parametric, non-parametric and SIIG index methods to study the genotype × environment interaction and seed yield stability of new sunflower hybrids 303 319 21407 10.22034/saps.2024.62530.3252 FA Amir Gholizadeh Assistant Professor, Crop and Horticultural Science Research Department, Golestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran Mehdi Ghaffari Associate Prof. Seed and Plant Improvement Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran Hossein Ahmadi-Ochtapeh Assistant Professor, Crop and Horticultural Science Research Department, Golestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran Morad Cheshmehnoor Researcher, Crop and Horticultural Science Research Department, Lorestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Khoramabad, Iran Gholam Hossein Shiresmaeili Assistant Professor, Crop and Horticultural Science Research Department, Isfahan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Isfahan, Iran Farnaz Shariati Faculty member of Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran Journal Article 2024 07 17 Background and Objectives: The aim of this study was to investigate the genotype × environment interaction and determine the yield stability of new sunflower hybrids. Materials and Methods: In this study, 18 hybrids along with the Zarin cultivar were evaluated under non stress, salinity and drought stress conditions in a randomized complete block design with three replications in four experimental field stations (Boroujerd, Gorgan, Gonbad and Isfahan) during 2022-2023 cropping season. In this study, parametric, non-parametric methods, and SIIG index were used to investigate the genotype × environment interaction and determine the yield stability of new sunflower hybrids. Plants were harvested at maturity and then the seed yield was recorded for each genotype at each test environment. Results: Results of combined analysis of variance indicated that the effects of environments, genotypes, and genotype × environment interaction were significant, suggesting that the genotypes responded differently in the studied environment conditions. So, there was the possibility of stability analysis. According to stability analysis using the Eberhart and Russel method, the H14, H10 and H1 genotypes with higher seed yield than the overall mean and regression coefficient equal one (bi=1) were identified as the genotypes with high general stability for all regions. Based on the simultaneous selection method for yield and stability (YSi), the genotypes H1, H4, and H10 with the lowest values were stable, whereas genotypes H3, H9, and H6 with the highest values were unstable. Also, based on the SIIG index, the genotypes H1, H4, H2, H10, H12, and H16 having high SIIG values as well as higher seed yield than the total average was recognized as superior genotypes from the point of stability and seed yield. Conclusion: Generally, the results indicated that hybrids H1, H4, H2, H10, H12 and H16 were superior genotypes for seed yield and stability in this study. Therefore, these hybrids can be used for further testing, including adaptation tests. Background and Objectives: The aim of this study was to investigate the genotype × environment interaction and determine the yield stability of new sunflower hybrids. Materials and Methods: In this study, 18 hybrids along with the Zarin cultivar were evaluated under non stress, salinity and drought stress conditions in a randomized complete block design with three replications in four experimental field stations (Boroujerd, Gorgan, Gonbad and Isfahan) during 2022-2023 cropping season. In this study, parametric, non-parametric methods, and SIIG index were used to investigate the genotype × environment interaction and determine the yield stability of new sunflower hybrids. Plants were harvested at maturity and then the seed yield was recorded for each genotype at each test environment. Results: Results of combined analysis of variance indicated that the effects of environments, genotypes, and genotype × environment interaction were significant, suggesting that the genotypes responded differently in the studied environment conditions. So, there was the possibility of stability analysis. According to stability analysis using the Eberhart and Russel method, the H14, H10 and H1 genotypes with higher seed yield than the overall mean and regression coefficient equal one (bi=1) were identified as the genotypes with high general stability for all regions. Based on the simultaneous selection method for yield and stability (YSi), the genotypes H1, H4, and H10 with the lowest values were stable, whereas genotypes H3, H9, and H6 with the highest values were unstable. Also, based on the SIIG index, the genotypes H1, H4, H2, H10, H12, and H16 having high SIIG values as well as higher seed yield than the total average was recognized as superior genotypes from the point of stability and seed yield. Conclusion: Generally, the results indicated that hybrids H1, H4, H2, H10, H12 and H16 were superior genotypes for seed yield and stability in this study. Therefore, these hybrids can be used for further testing, including adaptation tests.

https://sustainagriculture.tabrizu.ac.ir/article_21407_136b0d1a7bcedec9d65560be9e5683b4.pdf