찰벼 신소재 개발 = Development of Diversified Glutinous Rices

다국어 초록 (Multilingual Abstract)

Waxy rice lines of diversified qualities were developed by chemical mutagenesis and by introgressing the mutated genes for grain quality into waxy varieties. The low-amylose endosperm trait of a mutant line du-6 was expressed in case of homozygotic pairing of two independent recessive genes. The gene of low amylose endosperm of Du-7 showed a lethal effect on pollens and was transmitted into the progeny through only female parent. The flo(flourOy), su(sugary), and shr(shrunken) genes were transmitted to the F2 progenies independently with wx(waxy) gene. However, it was revealed that wx(waxy) gene was epistatic over du-1(dull) gene. Low-amylose mutant lines induced from the normal line had very low amylose content, 7.0∼10.4%. Sugary lines and giant embryo lines showed more lysine content. Giant embryo waxy lines revealed much more lipid content than the parent variety. Floury waxy and sugary waxy lines showed increased protein content, 9.0∼10.3%. Some waxy lines developed showed greater Ca^2+, Fe^2- and riboflavin content. Lines developed will be applicable for practical use as highly nutritive rices.