RICE SCIENCE ›› 2007, Vol. 14 ›› Issue (4): 239-246 .

• Research Paper •     Next Articles

Rapid Generation of Selectable Marker-Free Transgenic Rice with Three Target Genes by Co-Transformation and Anther Culture

ZHU Li 1, # ; FU Ya-ping 1, # ; LIU Wen-zhen 1; HU Guo-cheng 1; SI Hua-min 1; TANG Ke-xuan 2; SUN Zong-xiu 1
  

  1. 1 State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; 2 Plant Biotechnology Research Center, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200030, China; # These authors contributed equally to this paper
  • Received:2007-05-28 Online:2007-12-28 Published:2007-12-28
  • Contact: SUN Zong-xiu

Abstract: The ‘double T-DNA’ binary vector p13HSR which harbored two independent T-DNAs, containing hygromycin phosphotransferase gene (hpt) in one T-DNA region and three target genes (hLF, SB401, RZ10) in another T-DNA region, was used to generate selectable marker-free transgenic rice by Agrobacterium-mediated transformation. The regenerated plants with both the three target genes and the selectable marker gene hpt were selected for anther culture. RT-PCR analysis indicated that target genes were inserted in rice genomic DNA and successfully transcribed. It took only one year to obtain double haploid selectable marker-free transgenic plants containing the three target genes with co-transformation followed by anther culture technique, and the efficiency was 12.2%. It was also noted that one or two target genes derived from the binary vector were lost in some transgenic rice plants.

Key words: anther culture, co-transformation, selectable marker-free transgenic plants, rice, double T-DNA binary vector