【摘要】 通过Co60-γ射线照射籼稻保持系98-14B种子,获得其巨胚隐性单基因突变体98-14geB。98-14geB与98-14B主要农艺性状无显著差异,但绝对胚重和相对胚重分别由0.57mg和2.69%提高到1.17mg和6.33%。98-14geB糙米的蛋白质、粗脂肪、粗纤维、各种矿物质及氨基酸含量比98-14B显著提高。蛋白质含量11.87%,比98-14B提高了22.46%;粗脂肪含量5.25%,提高了58.13%;17种氨基酸含量均提高了,提高幅度为10.05%～34.85%;98-14geB的矿物质元素含量也普遍高于98-14B。与98-14B相比,98-14geB千粒重及生产力有所下降。用98-14geB回交98-14A育成巨胚不育系98-14geA。98-14geA与98-14A的主要农艺性状、雄性不育性特征及构成产量配合力均无明显差异。利用巨胚恢复系与98-14geA组配成巨胚杂交稻,还就巨胚稻的育种技术作了讨论。更多还原

【Abstract】 Induced mutants indica B lines with giant embryo 98-14geB were di re ctly obtained after irradiation on maintainers 98-14B. 98-14geB lines had simi lar plant tapes as the corresponding 98-14B lines. Compared with 98-14B,98-1 4geB has an increase in the absolute and relative embryo weight of its brown ric e,from 0.57mg to 1.17mg and 2.69%to 6.33%.98-14geB contains higher content of protein(11.87%) and lipid(5.25%).The contents of all 17 kinds of amino acid s rose by 10.05%to 34.85%;By back crossing 98-14geB lines with its correspond ing A lines 98-14A,giant embryo CMS lines 98-14geA were developed. 98-14geA lines had similar plant tapes、pollen fertility and yield components as 98-14A lines. Crossing giant embryo restorer lines with 98-14geA and giant embryo hybr ids were developed. In addition,the breeding technology for giant embryo rice w as discussed in this paper.更多还原