SCIENCE AND TECHNOLOGY OF CEREALS, OILS AND FOODS

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Breeding for Good Appearance Quality of Non-glutinous Rice Grain in Cold Region of Hokkaido in Japan (Japanese text)(Online First, Recommended Article)
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    Abstract:

    In Hokkaido, improving appearance quality of non-glutinous rice grain nearly up to those of varieties in the area south of Tohoku district has been the important breeding objective for a long time. For decreasing immature grain such as milky white and white-belly rice so on, increasing whole grain and heightening the whiteness of brown and of milled rice, selections mainly by visual estimation have been used up to the present time. In new and old varieties bred in 1903 and after, the varieties bred lately had more whole grain, and less immature grain, less damaged grain and less colored grain. Genetically “Yukara” bred in 1961 had extremely more whole grains comparing to varieties bred in before or the same age. On their pedigree record the main varieties bred after “Yukara” with good eating and good appearance quality of grain inherited the good appearance quality from “Yukara”. The main varieties bred in 1984 and after had rather less whole grain, and had rather more immature kernel than the main brand-name varieties in the area south of Tohoku district. Varieties bred before 1971 had many white-belly rice so on, and in new and old varieties varieties bred lately didn’t have higher whiteness of brown and milled rice. In varieties bred in 1971 and after, varieties bred lately, however, had higher the whiteness of brown and of milled rice, and negative correlation was found between protein content and the whiteness of brown and of milled rice. Although the present main varieties of Hokkaido had lower whiteness of brown rice comparing to main brand-name varieties in the area south of Tohoku district, those varieties of Hokkaido had the same whiteness of milled rice, the same transparency of brown rice, the same transparency of milled rice, and the same whiteness of brown rice especially with only whole grain. Although the present main varieties of Hokkaido had rather more immature kernel and rather less whole grain comparing to main brand-name varieties in the area south of Tohoku district, in grain appearance quality there weren’t clear differences between those varieties of Hokkaido and of the area south of Tohoku district.

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  • Received:
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  • Online: November 20,2020
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