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Plant and Cell Physiology Advance Access originally published online on January 19, 2005
Plant and Cell Physiology 2005 46(1):14-22; doi:10.1093/pcp/pci502
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© 2005 Oxford University Press

Mini Review

Molecular Genetics Using T-DNA in Rice

Gynheung An1,3, Shinyoung Lee1, Sung-Hyun Kim2 and Seong-Ryong Kim2

1 National Research Laboratory of Plant Functional Genomics, Division of Molecular and Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
2 Department of Life Science, Sogang University, Seoul 121-742, Korea

Now that sequencing of the rice genome is nearly completed, functional analysis of its large number of genes is the next challenge. Because rice is easy to transform, T-DNA has been used successfully to generate insertional mutant lines. Collectively, several laboratories throughout the world have established at least 200,000 T-DNA insertional lines. Some of those carry the GUS or GFP reporters for either gene or enhancer traps. Others are activation tagging lines for gain-of-function mutagenesis when T-DNA is inserted in the intergenic region. A forward genetic approach showed limited success because of somaclonal variations induced during tissue culture. To utilize these resources more efficiently, tagged lines have been produced for reverse genetics approaches. DNA pools of the T-DNA-tagged lines have been prepared for polymerase chain reaction (PCR) screening of insertional mutants in a given gene. Appropriate T-DNA insertion sites are determined by sequencing the region flanking the T-DNA. This information is then used to make databases that are shared with the scientific community. International efforts on seed amplification and maintenance are needed to exploit these valuable materials efficiently.

3 Corresponding author: E-mail, genean{at}postech.ac.kr; Fax, +82-54-279-0659.

(Received October 28, 2004; Accepted November 7, 2004)


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