Abstract
The aim of this study was to clone the isoflavone synthase (IFS) gene and establish the recombinant Minshan Trifolium pratense. The IFS gene was cloned from the callus of Minshan T. pratense using reverse transcription-polymerase chain reaction. The plant expression vector pRI101-AN-IFS was constructed and introduced into Agrobacterium tumefaciens strain LBA4404, and then screened under cephalosporin. IFS expression was detected by reverse transcription-polymerase chain reaction. The IFS gene was cloned successfully. Sequence analysis indicated that IFS gene had high homology with similar genes from other plants. The IFS-overexpressing callus was obtained by introducing the LBA4404-harboring IFS-pRI101-AN-IFS vector into T. pratense calluses.
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