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Acta Prataculturae Sinica ›› 2011, Vol. 20 ›› Issue (2): 193-200.

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Construction of antifreeze gene CBF2 expression vector and transformation into alfalfa callus

LIU Xiao-jing1,2, HAO Feng1,2, ZHANG De-gang1,2, MAO Juan3, YU Tie-feng1,2   

  1. 1.College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;
    2.Key Laboratory of Grassland Ecosystem of Ministry of Education, Sino-U.S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070, China;
    3.College of Agronomy,Gansu Agricultural University, Lanzhou 730070, China
  • Received:2009-12-08 Online:2011-02-25 Published:2011-04-20

Abstract: Arabidopsis thaliana genomic DNA was selected as a template to amplify the target gene by PCR and connect it to the PGEM-T Easy Vector for construction of the T-CBF2. The target fragment and linear plasmids were obtained from the cloning vector T-CBF2 and from the plant expression vector PBI121 with dual digestion using BamHⅠand Sac I, respectively. The plant expression vector P-T-CBF2 was built through directional connections using T4 DNA ligase. PCR identification proved that the recombinant had been transferred into Agrobacterium tumefaciens and it was then introduced into Medicago sativa cv. Hetian through Agrobacterium-mediated transformation. Transfer of the target gene to alfalfa callus was successful.

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