Document Type : Research Paper
Authors
1
Ph.D Student, Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2
Professor, Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
3
استاد بخش تحقیقات دانههای روغنی، مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران
4
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
10.22034/saps.2025.65366.3329
Abstract
In this study, 9 winter oilseed rape (WOSR) mutant lines along with six cultivars were evaluated in a randomized complete block design with three replications in six experimental field stations (Karaj, Kermanshah, Isfahan, Hamadan, Zarghan and Qazvin) during two cropping seasons. GGE biplot statistical method (genotype effect + genotype × environment interaction) was used to study stability of genotypes in the studied environments. Results of combined analysis of variance indicated that the effects of environments (E), genotypes (G) and genotype × environment (G×E) interaction were significant, suggesting that the genotypes responded differently in the studied environment conditions. So, there was the possibility of stability analysis. Results of genotype × environment interaction analysis using GGE-biplot method indicated that the two first and second principal components of the GGE-biplot explained 70.9% of the total seed yield variation. Based on the hypothetical ideal genotype biplot, the Talaye cultivar and Z-900-9 mutant line were better than the other genotypes for seed yield and stability and had the high general adaptation to all environments. Furthermore, the Nima and Talaye cultivars in Isfahan, Kermanshah and Karaj locations and Z-900-8 mutant line in Zarghan location were superior genotypes with the high specific adaptation. Too, the results showed that all environments had high discriminating ability so that could able to show differences between genotypes. The Hamadan, Kermanshah and Isfahan environments were the nearest environment to ideal environment that had the highest discriminating ability and representativeness.
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