M. Baghery, S. Kazemitabar, A. Dehestani, Pooyan Mehrabanjoubani, Hamid Najaf Zarrini
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引用次数: 0
Abstract
Sesame (Sesamum indicum L.) is one of the most important oilseed crops of the world, particularly tropical areas. Its production issignificantly affected by drought stress. The present study was performed to assess the efficiency of existing criteria for the selectionof tolerant cultivars while evaluating sesame genotypes under drought conditions. Various agro-morphological traits along with somedrought tolerance indices were used to evaluate 15 sesame genotypes under drought conditions. A moderate to high heritability wasestimated for plant height (0.55), no. of capsules (0.72), capsule diameter (0.60), no. of seeds per capsule (0.43) and seed yield (0.53).On average, the seed yield of genotypes was reduced by 45% under water stress. Seed yield was significantly positively correlatedwith the no. of capsules, capsule diameter, and no. of seeds per capsule under both normal and drought conditions. The number ofcapsules and capsule diameter were suggested as potential criteria for indirect yield selection under drought stress. Chinese (G01), Naz Chand Shakhe (G05), and Darab1 (G04) genotypes were identified as the most tolerant based on the average ranking of indices. Stress/non-stress production index (SNPI), yield index (YI), and drought resistance index (DI) were suggested as the most efficient drought tolerance indices according to principal component analysis and correlations. The evaluation criteria proposed in this study can be used for efficient selection of drought-tolerant genotypes in sesame. Moreover, reported tolerant and sensitive genotypes can be used in future studies and breeding programs in sesame under drought stress.
期刊介绍:
Advance the cause of genetics and plant breeding and to encourage and promote study and research in these disciplines in the service of agriculture; to disseminate the knowledge of genetics and plant breeding; provide facilities for association and conference among students of genetics and plant breeding and for encouragement of close relationship between them and those in the related sciences; advocate policies in the interest of the nation in the field of genetics and plant breeding, and facilitate international cooperation in the field of genetics and plant breeding.