Plant Molecular Biology

, Volume 15, Issue 2, pp 245–256 | Cite as

Agrobacterium-mediated plant transformation by novel mini-T vectors in conjunction with a high-copy vir region helper plasmid

  • Eva Zyprian
  • Clarence I. Kado


A new binary vector system for Agrobacterium-mediated plant transformation was developed. A set of four mini-T vectors comprised of T-DNA border sequences from nopaline-type Ti-plasmid pTiC58 flanking a chimaeric hygromycin-resistance gene for selection of transformants and up to eight unique restriction sites for cloning foreign DNA was constructed on a broad-host replicon containing the oriV of plasmid pSa. In two of the constructs these multiple cloning sites are flanked by a strong promoter to activate transcription of inserted DNA in planta. High-efficiency transformation was prompted by a high-copy, stable virulence helper plasmid pUCD2614, which contains a cloned virulence region of pTiC58 and tandem copies of the par locus of plasmid pTAR. Southern blot hybridization and genetic analyses of the progeny of transformed plants showed that the hygromycin resistance gene was stably inherited.

Key words

binary vector high-copy virulence plasmid hygromycin B resistance broad-host-range shuttle vector Agrobacterium tumefaciens pSa 


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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Eva Zyprian
    • 1
  • Clarence I. Kado
    • 1
  1. 1.Department of Plant PathologyUniversity of CaliforniaDavisUSA

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