Abstract
Embryogenie callus of indica rice (Oryza sativa L.) cv. Basmati 370 induced on MS medium containing 9.05 μM2,4-D was irradiated at 50 Gy of gamma rays of 60Co for creating genetic variability against salinity. Irradiated and non-irradiated calluses were screened in vitro through three consecutive proliferation phases at 4.0, 6.0, 8.0 and 10.0 d/Sm electrical conductivity of NaCl. Growth value and number of adapted mutagenized callus was more than that of non-mutagenized callus. Salinity levels beyond 6 d/Sm and 8 d/Sm were lethal to growth and adaptation of non-irradiated and irradiated callus respectively. NaCl adapted irradiated callus showed 2.0%–4.75% regeneration frequency on MS regeneration medium containing 5.37 MNAA and 9.29 μMKinetin. Non-mutagenized salt adapted callus did not show any regeneration. From gamma ray mutagenized cultures, 2 putative lines (M2 generation) with moderate salt tolerance were obtained at seedling stage. The results suggest that in vitro technique in connection with gamma rays may be used as a versatile approach to improve the level of salt tolerance in Basmati rice for saline environment.
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Saleem, M.Y., Mukhtar, Z., Cheema, A.A. et al. Induced mutation and in vitro techniques as a method to induce salt tolerance in Basmati rice (Oryza sauva L.). Int. J. Environ. Sci. Technol. 2, 141–145 (2005). https://doi.org/10.1007/BF03325868
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DOI: https://doi.org/10.1007/BF03325868