نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، مؤسسه تحقیقات برنج کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران.
2 دانشیار، مؤسسه تحقیقات برنج کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Introduction: After wheat, rice is the most important cereal in the world, providing a large portion of the calories needed by the human population and playing an important role in the nutrition of human societies. The world's largest rice production and consumption is in the Asian continent. Rice production must be increased through breeding programs that aim to achieve high-yielding varieties to face the challenges of the ever-increasing world population and climate change. The interaction of genotype and environment in crop breeding and production is inevitable. Considering the interaction of genotype and environment through stability analysis models can facilitate the accurate locating of varieties in different regions. Therefore, this study evaluated the yield stability of six promising rice lines and two varieties, Shiroodi and Hashemi, as controls.
Materials and methods: Six promising rice genotypes and two varieties including Shiroodi and Hashemi as controls were cultivated and evaluated in a randomized complete block design with three replications in two regions (Rasht and Chaparsar) for three years starting from 2015. Combined variance analysis and the F test were performed assuming randomness of years and fixedness of locations and genotypes, based on expectation values of the mean squares and comparison of means by Tukey's method. With the significant interaction effect of genotype × environment for the studied traits, stability analysis was performed using Lin and Beans, AMMI and GGE-biplot methods.
Results: The results of combined variance analysis showed that the effects of genotype, location, year × location, genotype × location and genotype × year × location were significant. The results of the stability analysis of rice genotypes by Lin and Binns method showed that Genotypes 19401 and 19403 had the first and second rank in yield stability. Evaluation of AMMI model parameters showed that Genotypes 19401, 19402, 19404 and 19403 were stable genotypes with high general adaptability. Based on ASV parameter and grain yield, Genotypes 19401 and 19402 were selected as the most stable genotypes. Also, the results of the GGE-biplot method showed that Genotype 19401 had the most stability among the investigated genotypes and had a good grain yield.
Conclusion: Overall, the results of evaluating the stability of promising rice lines using Lin and Binns, AMMI and GGE-biplot methods showed that Genotype 19401 was the most stable promising line with mean paddy production of 6.3 tons per hectare in the two locations and three years. It was considered as one of the high-yielding lines without any significant difference with the improved Shiroodi cultivar.
کلیدواژه‌ها [English]
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