نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی تولید و ژنتیک گیاهی، دانشکده علوم و مهندسی کشاورزی، دانشگاه رازی، کرمانشاه، ایران.
2 گروه مهندسی تولید و ژنتیک گیاهی، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Introduction: Oat (Avena sativa L.), as a crop with high nutritional value, plays a significant role in providing food for both humans and livestock. However, drought stress has considerable negative effects on its growth and performance.
Materials and methods: This study aimed to evaluate grain yield and identify drought-tolerant genotypes using stress tolerance indices in 21 oat genotypes, were conducted using a randomized complete block design with three replications, under three conditions: irrigated (non-stress), rainfed, and post-flowering drought stress, at the Agricultural and Natural Resources Research Farm of Razi University in Kermanshah during the 2014-2015 cropping years.
Results: The results indicated that the stress tolerance index (STI), mean productivity (MP), and geometric mean productivity (GMP) were positively and significantly correlated with grain yield under both stress and non-stress conditions, and are therefore suitable for screening drought-tolerant genotypes. The results of the principal component analysis indicated that the first two components justified more than 99% of the variation in the data. Based on the biplot diagram, Genotypes 7 and 17 showed strong performance under both conditions and Genotypes 19, 21, 12, 13, 6, 3, and 5 were recommended for cultivation under late-season drought conditions.
Conclusion: Under rainfed conditions, Genotypes 7, 17, 5, 9, and 13 and under post-flowering drought stress, Genotypes 5, 19, 21, 3, 7, and 17 were having favorable traits and consistent yields. The findings of this research could contribute to the improvement of oat breeding programs and the development of drought-resistant varieties.
Introduction: Oat (Avena sativa L.), as a crop with high nutritional value, plays a significant role in providing food for both humans and livestock. However, drought stress has considerable negative effects on its growth and performance.
Materials and methods: This study aimed to evaluate grain yield and identify drought-tolerant genotypes using stress tolerance indices in 21 oat genotypes, were conducted using a randomized complete block design with three replications, under three conditions: irrigated (non-stress), rainfed, and post-flowering drought stress, at the Agricultural and Natural Resources Research Farm of Razi University in Kermanshah during the 2014-2015 cropping years.
Results: The results indicated that the stress tolerance index (STI), mean productivity (MP), and geometric mean productivity (GMP) were positively and significantly correlated with grain yield under both stress and non-stress conditions, and are therefore suitable for screening drought-tolerant genotypes. The results of the principal component analysis indicated that the first two components justified more than 99% of the variation in the data. Based on the biplot diagram, Genotypes 7 and 17 showed strong performance under both conditions and Genotypes 19, 21, 12, 13, 6, 3, and 5 were recommended for cultivation under late-season drought conditions.
Conclusion: Under rainfed conditions, Genotypes 7, 17, 5, 9, and 13 and under post-flowering drought stress, Genotypes 5, 19, 21, 3, 7, and 17 were having favorable traits and consistent yields. The findings of this research could contribute to the improvement of oat breeding programs and the development of drought-resistant varieties.
کلیدواژهها [English]
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