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Studying the Genotype × Environment Interaction and Seed Yield Stability of New Sunflower Hybrids
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Amir Gholizadeh *   , Mehdi Ghaffari , Abbas Rezaeizad , Fathollah Nadali |
| Crop and Horticultural Science Research Department, Golestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran , a.gholizadeh@areeo.ac.ir |
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Abstract: (128 Views) |
The genotype × environment interaction is a major challenge in studying quantitative characters because it reduces yield stability in different environments. To this end, and to analysis genotype × environment interaction and determining the yield stability of new oily sunflower hybrids, 16 sunflower genotypes were evaluated in a randomized complete block design with four replications in four experimental field stations (Karaj, Gorgan, Kermanshah and Shahrud) during 2021–2023 cropping seasons. 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 different environment conditions, enabling the possibility of stability analysis. According to the results of stability analysis using Eberhart and Russel method, the H8, H11, H14 and H10 genotypes with higher seed yield than overall mean and regression coefficient equal to one (bi=1) was identified as the genotype with high general stability for all environments. Based on the simultaneous selection method for yield and stability (YSi), the H10, H10 and H8 genotypes with the lowest values were stable, whereas genotypes H9, H16 and H6 with highest values were unstable. Also, based on the SIIG index, the H10 and H11 genotypes exhibiting high SIIG value as well as higher seed yield that total average were recognized as superior genotypes from the point of stability and seed yield. These genotypes showed the potential to be cultivated in research-extension trials for introduction as new cultivars. According to the results of cluster analysis, Gorgan and Kermanshah environments were located in a group that indicates these locations had the high predictability and repeatability power. |
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| Keywords: Sunflower, Broad compatibility, Eberhart and Russel method, SIIG index |
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Type of Study: Research |
Subject:
Molecular genetics
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