Abstract
To provide effective and specific native promoters for canola (Brassica napus L.) genetic modification, three promoters were isolated by genome walking from this species. These three promoters were fused to the uidA reporter gene (GUS) and were independently used to generate populations of transgenic canola plants. Plants transformed with BnPGPro-GUS (B. napus putative germin promoter) exhibited GUS activity in all the tissues tested at a level comparable to those transformed with CaMV35 S promoter. This indicates that BnPGPro may serve as a native constitutive promoter for canola. The other two promoters, BnPro3-GUS and BnPro5-GUS (B. napus, promoter 3 and 5), exhibited GUS activity in various tissues. None of these two promoters expressed in embryo, however. These novel Brassica native promoters can be used to modify canola genes for various purposes.
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