The objective of this study was to provide fundamental data on breeding cultivar and cultural technique to identify quality characterization according to damage degrees in rice when are damaged at low temper-ature. For induction of cold damage, we treated the irri-gation water at 17℃ from the panicle formation stage to the heading date. The rice products were harvested by grades according to the sterility ratio and investigated 5 items of quality analysis including ripened grain ratio, brown/rough rice ratio, 1000 grain weight of brown rice, protein content, and amylose content. The quality analysis were characteri-zed by each items according to the sterility ratio. As a result, the ripened grain ratio was y=1.0444x-7.6597 (R2=0.9874**), protein content was y=-0.046x+10.875 (R2=0.6973*), and head rice ratio was y=-0.2306x+104.32 (R2=0.634*), but the amylose content, brown/rough rice ratio and the milled/brown rice ratio were not significant. The rice plants, which injured by the low temperature, had bad influence in the yield and quality. Consequently, the breeding of rice cultivar and development of cultural technique are required to improve its cold tolerance.
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