Abstract
Genetic transformation using shoot meristematic cultures (SMCs) derived from germinated seedlings is established in commercial varieties of oat cv 'Garry' and barley cv 'Harrington'. Six-month-old SMCs of oat were induced on MPM and bombarded with bar and uidA; 9-month-old SMCs of barley were induced on an improved medium (MPM-MC) containing maltose and high levels of copper and bombarded with bar/nptII and uidA. After 3–4 months on selection, seven independent transgenic lines of oat were obtained, two lines of barley. All transgenic lines produced T0 plants; five lines of oat and one line of barley were self-fertile, and the other barley line produced T1 seed when out-crossed. Both Mendelian and non-Mendelian segregation ratios of transgene expression were observed in T1 and T2 progeny of transgenic oat. Normal as well as low physical transmission of the transgenes was also seen in T1 and T2 progeny of oat. The bar-containing line of barley showed stable transgene expression in all of the T1 and T2 progeny tested.
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