Transformation of commercially important indica cultivars remains challenging for the scientific community even though Agrobacterium-mediated transformation protocols for a few indica rice lines have been well established. We report successful transformation of a commercially important restorer line JK1044R of indica rice hybrid JKRH 401. While following existing protocol, we optimized several parameters for callusing, regeneration and genetic transformation of JK1044R. Calli generated from the rice scutellum tissue were used for transformation by Agrobacterium harboring pCAMBIA2201. A novel two tire selection scheme comprising of Geneticin (G418) and Paramomycin were deployed for selection of transgenic calli as well as regenerated plantlets that expressed neomycin phosphotransferase-II gene encoded by the vector. One specific combination of G418 (30 mg l(-1)) and Paramomycin (70 mg l(-1)) was very effective for calli selection. Transformed and selected calli were detected by monitoring the expression of the reporter gene uidA (GUS). Regenerated plantlets were confirmed through PCR analysis of nptII and gus genes specific primers as well as dot blot using gus gene specific as probe.
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| http://dx.doi.org/10.1007/s12298-015-0334-y | DOI Listing |
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