Comparison of Grain Quality of Bacterial Blight Resistant Near-isogenic Lines of Rice under Different Fertilization Levels

  • Shin Mun-Sik (Youngnam Agricultural Research Institute, NICS, RDA) ;
  • Kim Ki-Young (Honam Agricultural Research Institute, NICS, RDA) ;
  • Choi Yun-Hi (National Institute of Crop Science, RDA) ;
  • Shin Seo-Ho (Honam Agricultural Research Institute, NICS, RDA) ;
  • Ko Jae-Kwon (Honam Agricultural Research Institute, NICS, RDA) ;
  • Lee Jae-Kil (Honam Agricultural Research Institute, NICS, RDA)
  • Published : 2006.09.01

Abstract

This study was conducted in 2002 and 2003 to investigate variation on rice quality associated with cooking, and eating qualities under the three different fertilizer levels, none fertilizer level($N-P_2O_{5-}K_2O=0-0-0kg/ha$), ordinary fertilizer level($N-P_2O_{5-}K_2O=1l0-45-57kg/ha$), and heavy fertilizer level($N-P_2O_{5-}K_2O=180-90-110kg/ha$). The eight resistant near-isogenic lines(NILs) for bacterial blight in rice were examined for grain appearances, several physicochemical properties, and palatability value measured by Toyo taste meter. Significant variations in NILs(V), Years(Y), and VxY interaction were recognized in grain length and palatability value under the none fertilizer cultivation, in grain width under the heavy fertilizer cultivation, and in white belly ratio under the three different fertilizer cultivations, respectively. According to increase the fertilizer application rate, variation in grain length and grain width were not significant, but grain thickness was thinner under the ordinary and heavy fertilizer cultivations than under the none fertilizer cultivation. On the other hand, white belly ratio, protein content and Mg/K ratio increased, while amylose content and palatability value lowered. Alkali spreading value lowed under the heavy fertilizer cultivation than under the none and ordinary fertilizer cultivations. Palatability value was significantly low in the line carrying XalJ than in the other lines under the ordinary fertilizer cultivations.

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