Abstract
We have developed a new procedure for transforming a model legume, Lotus japonicus, that yields transformed plants from transverse cotyledon segments without contamination from the presence of non-transformants that survived the antibiotic selection. L. japonicus was transformed with the HPT gene as a selectable marker and the GUS reporter gene, both of which were driven by cauliflower mosaic virus 35S promoter. The efficacy of selection with hygromycin was tested using the assay of GUS activity in putative transformants. The integration of the GUS gene was also confirmed by polymerase chain reaction analysis of the genomic DNA. The integrated T-DNA was stable and inherited as a dominant trait. This procedure may have potential effectiveness and application in large-scale transformation for insertional mutagenesis or gene tagging.
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