Agrobacterium-mediated transformation is a suitable method to transform different cultivars using different systems of A. tumefaciens strains and binary vectors as well as selection cassettes. We describe here a detailed protocol for two cultivars, one naked and one husked, using the AGL1 strain and the pGreen vector containing the nptII selection cassette ( http://www.pgreen.ac.uk/ ), suitable for oat as well as other cereals. The pGreen vector system was recently developed for pBract ( http://www.bract.org/ ) and its transformation ability for cereals was proved. Assuming our experience and the latest knowledge on Agrobacterium-mediated transformation of cereals, we suggest using in the protocol one of the newly developed pBract or pCAMBIA ( http://www.cambia.org/daisy/cambia/ ) vector systems which carry different selection cassettes. The commonly used selection genes nptII, bar, and hpt were proved to be applicable for oat transformation and might be used as needed.
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