‘Superhongmi’, a reddish brown rice cultivar, was derived from a cross between CG2-3-5-1-6-1 (Heugjinju/Suwon 425) producing blackish purple rice and ‘Daeribbyeo 1’ producing large white grains. A promising line, SR28721-7-5-2-1-2-1, was obtained using the pedigree breeding method from 2003 to 2015 and designated as ‘KNOU6R’. This variety headed on September 5, and its culm length is 94.7 cm. The panicle length of ‘Superhongmi’ is 19.8 cm. The number of panicles per hill and grain per panicle is 5.4 ea and 154.9 ea, respectively. The fertility ratio of ‘Superhongmi’ is approximately 91.0% and 1000-grain weight (TGW) is approximately 26.8 g, which is similar to that of ‘Superjami’; however, the number of panicles per hill is half of that of ‘Superjami’. The content of taxifolin and total polyphenol extracted from whole grains of ‘Superhongmi’ is 67.7 and 248 mg/100g seed weight, respectively (Registration No. 7365).

This study was conducted to obtain general information for rice breeding materials high in taxifolin content. The taxifolin was isolated from the rice variety, ‘Superhongmi’, and was identified by means of spectral methods and quantitative analysis using a high performance liquid chromatography (HPLC). The taxifolin content of the ‘Superhongmi’ variety was ranged between 32mg and 68mg per 100g seed that differs depending on cultivated regions. The taxifolin content was lower grown at mid north than those at south region. A large amount of taxifolin was found in the aleurone layer of seed as well as in the node of spike of the ‘Superhongmi’. The weight of 1,000 grains was ranged between 23.5g and 27.8g that varied depending on cultivated regions. This variety showed heading in the 6^th of September, and its fertility ratio was about 83% in sejong region. These results suggest that the taxifolin-rich rice variety, ‘Superhongmi’, is a good source of functional and stable food.