【摘要】 以3个转双价抗虫基因水稻种质与5个非抗虫恢复系材料为亲本,按NC II设计配制杂交组合,分析7个产量性状的配合力。结果表明:(1)所考查性状的一般配合力和特殊配合力均达显著或极显著水平,其中株高、有效穗、穗长和每穗粒数等性状以加性效应为主,千粒重、结实率和单株产量等性状受基因的非加性效应影响较大。(2)非抗虫恢复系对杂种一代的性状形成起主要作用。(3)亲本各性状的一般配合力和特殊配合力之间没有明显的对应关系,一般配合力与亲本自身的表现值则有一定的相关性,说明在育种研究中必须注意亲本自身性状的改良。更多还原

【Abstract】 Three transgenic rice varieties with Bt and sck gene germplasms and five restoring lines of three-line india hybrid rice were selected as parents to analyze the combining ability of 7 yield characters by the way of p×q incomplete diallele cross(NCII) design.The results showed that(1) both general combining ability(GCA) and specific combining ability(SCA) of all the yield characters were significant at the level of 5% or 1%;the additive variation was principal for the yield characters of plant height(PH),effective panicles/plant(EPP),panicle length(PL) and totle grains/panicle(TGP),while non additive variation was greater for the yield characters of 1 000-grain weight(1 000 GW),setting ratio(TR)and grain weight/plant(GWP);(2) all the yield characters were more greatly influenced by restorer line than by transgenic rice with Bt and sck genes;(3) effects of various characters on the GCA and SCA were not significantly related to each other,which suggested that it is essential to pay attention to improvement of the parent characters.更多还原