Impact of Gibberellic Acid on Seed Yield and Quality of Sesame (Sesamum indicum L.)

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Seed Science and Technology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia – 741252
Sesame (Sesamum indicum L) being an important oil seed crop, proper knowledge of genotypes, their management through foliar application of plant hormone is important for proper growth, seed yield and seed quality improvement. The present investigation was carried out to assess growth pattern, seed yield and yield attributing characters through application of GA3. Deterioration of seed quality during storage condition is another aspect so that seed quality can be maintained up to next season of sowing. The present research work comprised both field and laboratory components comprising four released varieties of sesame namely Rama, Savitri, Suprava and Tilottoma. The field experiment was conducted in summer season 2022 at Jaguli Instructional Farm, Mohanpur, Bidhan Chandra Krishi Viswavidyalaya. The laboratory experiment was conducted in the department of Seed Science and Technology, Bidhan Chandra Krishi Viswavidylaya, Mohanpur, Nadia. Observations on storage potential of produced seeds of four varieties in different containers were recorded at 3 months interval up to next year of sowing. Statistical analysis was done with the help of ̒OPSTAT̕ software programme. The major and important findings of the present study are summarized according to the objectives of the programme There was significant variation for days to first flowering, days to 50% flowering and days to100 % flowering for all the varieties. Among the four varieties Tilottoma had early days to maturity followed by Rama. Among the treatments, T7 (control) had influence of early maturity followed by T1 (GA3 @ 50 ppm). The treatments had variable effects on different characters of flowering and maturity. Capsule length, capsule width and fresh weight are important characteristics which lead to higher seed yield. Maximum capsule length was recorded by Rama followed by Tilottoma and Rama had maximum capsule width followed by Savitri. Among the four varieties Savitri produced maximum seed yield (kg/ha) may be due to higher number of seed capsule-1 and in order to assess the growth pattern due to application of GA3, it was observed that Tilottoma attained least plant height at the time of maturity and Rama followed by Suprava attained maximum plant height. Savitri, Suprava and Tilottoma showed significant effect due to application of GA3 for the character number of capsule plant-1 at different growth stages. Pattern of seed deterioration under storage condition revealed that desiccators had least influenced for degradation of seed quality while cloth bag had maximum effect for deterioration of seed quality. thousand seed weight. After critical consideration of the findings of present research work it may be inferred that GA3 @ 400-500 ppm may be applied between 30-45 days after sowing for improving seed yield and the variety Savitri was highly influenced due to application of this plant hormone. For safe storage of seeds desiccator followed by earthen pot may be used to maintain the seed quality.