【摘要】 为了明确水稻叶色白化转绿光温敏核不育突变系的育种应用价值,笔者对通过辐射诱变获得的具有白化转绿特性的6个光温敏核不育系的遗传及其生物学特性进行了研究。结果表明,6个突变体可分为3种类型:白化转浅绿类型(21W4)、白化转绿类型(21W7、21W9和21W13)和白化转黄绿类型(21W1和21W10)。21W1的叶色变化特性是由一对显性基因控制,21W4、21W7、21W9、21W10和21W13的叶色变化特性是受一对隐性基因控制。6个突变体在穗长、倒二叶、有效穗、播始历期、颖花宽、柱头单边外露率和柱头总外露率方面与对照品种‘SE21S’有所差异,但它们均保持了‘SE21S’的育性转换特性。突变体的杂种具有与原杂交稻相似的株叶形态和株高生长动态,产量构成因素依不同的突变系而表现不同,其中21W1、21W4、21W9和21W10的杂种具有较高的产量潜力,有较好的育种利用价值。更多还原

【Abstract】 In order to evaluate the breeding utilization of photo-thermo-sensitive genic male sterile mutant lines with greenable albino leaf, the inheritance and main agronomic traits of six photo-thermo-sensitive genic male sterile lines with greenable albino leaf were investigated. The results indicated that six mutants might be divided into three types: albino to pale-green type (21W4), albino regreening type (21W7, 21W9 and 21W13) and albino to kelly type (21W1 and 21W10).The mutated green-revertible albino leaf color trait of 21W1 was controlled by a single dominant gene, and those others were all controlled by a single recessive gene. These mutants were different with ‘ SE21S ’ in plant height, second leave from top, No.of productive number, heading day, width of floret, single-outcrossing rate and total outcrossing rate, and they had similar fertility characteristics to the corresponding male sterile line ‘ SE21S ’ . The hybrids of these mutants had similar caracteristics with original-hybrids in plant type and height, but their yield components were different with different mutants, the hybrids of 21W4, 21W9 and 21W10 had better yield potential compared with original-hybrids and maybe they had better breeding application prospects.更多还原