水稻 高蛋白突然變異係統과 母品種과의 交雜 F₃에 있어서 多發性遺傳因子의 發現 (Ⅱ)

Manifestation in F₃ of Pleiotropic Gene in the Cross between Mother Variety and its High Protein Mutant (Ⅱ)

Rice variety Hokwang was X-rayed in 1965 and a high protein line No. 398 was selected. This mutant, besides high protein, accompanied two visible mutated characters, short culm and early heading. In 1973 crossing was made between mutant 398 and its mother variety and in 1976 F₃ generations were grown to examine the manifestation of the mutated gene. It was confirmed that the above-mentioned mutated characters were controlled by a single recessive major gene of pleiotropic nature. Recessive deficit was observed in the segreation ratio of mutated characters. Besides the parental types, there were deviants which were assumed to be caused by the changed genetic background. It was considered possible to make a selection, from among the deviants, of motherlike type with high protein content.