내용요약(Abstract) :
Rice is one of the most important food crops for humans. To improve the agronomical traits in rice, functions of more than 700 rice genes have been characterized and recently well summarized. However, this progress is still very limited to systematically assign functions to all predicted non transposable element (non-TE) genes in rice genome, estimated to 37,000~41,000, and generate the best strategy to enhance agronomic traits. has generated the huge number of gene indexed mutants using mutagens such as T-DNA, Tos17 and Ds/dSpm which have been identified by 246,566 flanking sequence tags (FSTs) and cover mutations for the 65.9% of non-TE genes in rice. Slow progress of functional characterization for rice genes is mainly due to the lack of clues to guide the functional studies or functional redundancy. The clues are provided through the functional classification of FST genes as well as meta-expression data based on a large collection of microarray data. For the functional classification for rice FST genes, we used the diverse overviews installed in MapMan toolkit. Thereafter, we assigned 29,660 FST genes to 35 MapMan classes. In addition, meta-expression profiles for anatomy, abiotic stress, biotic stress and hormone responses provide the more probable clues of biological function for FST genes. Subsequently, we suggest 8,916 genes associated with featured anatomical expression patterns, 1,971 with biotic stress, 2,083 with abiotic stress, and 610 with hormone responses. Of these, we identified 1,513 rice genes associated with water stress. Using gene indexed mutants, we are analyzing functions of 234 genes. The progress and future prospect will be presented.