【摘要】 利用 30 0 Gy6 0 Co- γ射线辐照籼型保持系龙特甫 B和 32 B,获得了多种类型的叶色突变体 (分别记为 L Bn和 Bn)。对其中的 13个 LBn和 7个 Bn的稻米理化品质测定结果显示 ,L Bn的表观直链淀粉含量 (AAC)、碱消值 (ASV)和胶稠度 (GC)与亲本差异不显著。但淀粉粘滞特性 (RVA谱 )变异较大。而在 Bn中 , B11的 AAC、ASV和 GC与亲本 32 B有极显著差异 ; B9的 GC也与亲本差异极显著。 B11和 B9的 RVA谱也与 32 B存在差异。配合力分析表明 ,由突变体 L B3和 B2转育而成的带叶色标记不育系 LA3和 A2的配合力与各自的亲本相仿更多还原

【Abstract】 Leaf color mutant lines, designed as LBn and ⅡBn, respectively, were obtained from the mutated progenies of two cytoplasmic male sterile (CMS) maintainers Longtefu B and Ⅱ32B, of which the dried seeds were treated with 300 Gy 60 Co γ rays. It was found that all 13 lines of LBn had similar apparent amylose content (AAC), alkali spreading value(ASV) and gel consistency (GC) to their parental variety, respectively. The starch paste characters (RVA profiles) of the 13 mutant lines were markedly different from that of their parent Longtefu B. However, the AAC, ASV and GC of ⅡB11 was significantly different from those of Ⅱ32B, and so of the GC of ⅡB9. The RVA profiles of ⅡB9 and ⅡB11 were different from those of Ⅱ32B to some extent. Test of F 1 hybrid performance showed that LA3 and ⅡA2, derived from leaf color mutant lines LB3 and ⅡB2, respectively, had excellent combining ability similar to their corresponding parents.更多还原