• KOREAN JOURNAL OF CROP SCIENCE
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• v.44 no.3
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• pp.277-281
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• 1999

Dull grains segregated from F$_3$ and F$_4$ of the crosses between two dull mutants and a glutinous cultivar were compared with non-glutinous and glutinous segregants for their physicochemical properties. Amylose content of dull rice grain segregated from the dull/glutinous cross showed the intermediate value between glutinous and non-glutinous rice grain, whether it is controlled by the recessive or dominant gene. Alkali digestibility value (ADV) of dull rice grain was lower than that of glutinous or non-glutinous rice. A positive correlation was found between ADV and amylose content of homozygous non-glutinous or dull F$_4$ grains, but a negative relationship was observed in glutinous grains. Protein content of dull grain was significantly higher than that of glutinous or non-glutinous grain segregated from the same cross, while those of glutinous and non-glutinous grains were not different. Among gelatinization characteristics, initial pasting temperature and peak viscosity of dull grains were higher than glutinous rice, and were not different with non-glutinous grain. Hot, cool and consistency viscosities of dull grain were intermediate between glutinous and non-glutinous rices. Dull grains showed the highest breakdown viscosity and the lowest setback viscosity among the three endosperm types.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.10
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• pp.57-60
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• 1971

In this experiment 5 Korean varieties and 3 U.S.A. varieties of wheat were investigated for their moisture content, ash content, crude protein content and extraction rate. The results are summarized as follows; 1. In the case of U.S.A. wheat, the ash content is directly proportional to the content of protein but the extraction rate is negatively correlated to the content of ash. 2. In the case of korean wheat, there is no proportional tendency as in the U.S.A. wheat. It might be cause by the low extraction rate where the endosperm is hardly separated from the bran layer at the same conditions of temering process. 3. The concentration of protein particles in the endospern, is centrifugal in the U.S.A. wheats, but in the Korean varieties the direction is oppositional to the U.S.A. varieties. 4. Yooksung ＃3, Cahngkwang, Youngkwang and Hard winter wheat are adapted to the production of all purpose flour or noodle flour; Noring ＃4, Jinkwang and Softwhite wheat are suitable for the process of cake flour; and Dark northern spring is just adaped to the production of bread flour.

• Korean Journal of Weed Science
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• v.10 no.4
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• pp.261-268
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• 1990

Various herbicides were applied to the young rice seedling from which endosperm were removed and their effects were determined at 40 days after transplanting. Generally, growth was retarded, but the number of tillers was not effected. Application of bensulfuron and pretilachlor showed slight growth inhibition compared to dimepiperate and pyrazolate. Injury due to herbicide application was dependent on the transplanting depth. Injury was severe when pretilachlor and pyrazolate were applied to rice transplanted 0 and 4cm deep, respectively. However, bensulfuron showed much injury regardless of transplanting depths with the tendency of general growth retardation. Dimepiperate was fairly safe at all transplanting depths. The application of herbicides at 3 and 6 DAT showed higher injury than that at g and 12 DAT. The degree of injury was severe when pretilachlor and bensulfuron were applied.