نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، بخش تحقیقات علوم زراعی و باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان گلستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، گرگان، ایران
2 دانشیار، بخش تحقیقات دانههای روغنی، مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران
3 استادیار، بخش تحقیقات دانههای روغنی، مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to select drought-tolerant hybrids, 18 new sunflower hybrids with ZARIN cultivar were evaluated in a randomized complete block design in non-stressed and drought-stressed conditions in two experimental field stations (Gorgan and Gonbad) during 2021-2022 cropping season. Based on yield (seed yield and oil yield) in non-stress (Yp) and drought stress (Ys), various stress tolerance indices such as stress tolerance index (STI), mean productivity (MP), geometric mean productivity (GMP), harmonic mean (HM), Stress susceptibility index (SSI) and tolerance index (TOL) were calculated. The results of combined analysis indicated that the environmental effect justified the largest percentage of all data variations. Correlation analysis between drought tolerance indices with non-stressed and drought-stressed yields showed that HM, MP, GMP and STI indices and especially STI index were recognized as the most suitable indices for selecting drought tolerant genotypes in sunflower. The correlation between oil yield under non-stressed and drought-stressed was significant at the 5% probability level. Three-dimensional diagrams based on STI index and yield in non-stress and drought stress conditions showed that H16, H10, H2, H4 and H1 hybrids had good performance in both non-stress and drought stress conditions and were selected as the most tolerant genotypes to drought stress. Therefore, these hybrids can be used for further testing, including adaptation tests in warm wet areas.
کلیدواژهها [English]