【摘要】 从普通野生稻钴－６０γ射线处理后代性状变异、籼粳性鉴别、同工酶分析和野栽杂交亲和性对中国栽培稻近缘祖先及其向栽培稻演化进行的研究表明，通过基因突变和重组，普通野生稻多年生匐匍生态型能产生倾斜和半直立类型；多年生倾斜生态型能产生一年生的直立型，并出现匐匍性的返祖遗传。多年生倾斜生态型由多年生匐匍型演化而来，具有演化为籼稻和粳稻的遗传基础。更多还原

【Abstract】 For determination of the kindred progenitor of Chinese cultivated rice and its evolution. preliminary studies on character variation of O. rufipogon Griff induced by (50)￣Co-γ radiation, indica (hsien) -japonica (Keng) morphological discrimination of M1 and its wild rice parents, isozyme analysis and hybridization between wild and cultivated rice were undertaken. By means of gene mutation and recombination of the mutants, perennial declinational and semi-erect types, atavistic prostrate and annual erect types were respectively obtained from prostrate and declinational types. The result indicated that declinaltional types which were derived from prostrate type and had higher evolutionary potentiality may be more likely to be the progenitor of indica or japonica Chinese cultivated rice.更多还原