籼型杂交水稻主要数量性状胞质效应的多样性

Analysis of the Diversity of Cytoplasmic Effects of Some Quantitative Traits in Hybrid Rice( Oryza sativa ssp. indica )

用三套具三种不同雄性不育细胞质的９个不育系，与８个具有明显差异的恢复系组成９×８不完全双列杂交，再按裂区设计分析胞质效应的多样性。表现为不同胞质对同一性状和同一胞质对不同性状的效应存在差异；也表现为胞质效应的组成的多样性，即由胞质的一般配合力、胞质与保持系结合的特殊的一般配合力、胞质与恢复系互作的特殊配合力及胞质与保持系、恢复系互作的特殊配合力４个组分中的一个或多个组成。Ｗ－ｃｍｓ、Ｄ－ｃｍｓ、Ｋ－ｃｍｓ三种胞质对杂种一代千粒重的效应包含上述４个组分，且胞质间存在明显差异；对杂种一代穗总粒数的效应只含胞质与保持系、恢复系互作的特殊配合力；对其余主要经济性状的效应无显著差异。

Analysis of the diversity effects of cytoplasmic male sterility(CMS) was carried out in a 9×8 incomplete diallele cross including 3 series of isonuclear-allocytoplasmic lines under three kinds of CMS background,i.e.9 CMS lines,and 8 restorer lines,with split block design.The effects of different CMSs on one trait were diverse from each other,so were the effects of one CMS on different traits.Besides,the effect of CMS consists of one or more of four components,namely,the gca of CMS,the special gca of interaction in CMS-maintainer combination which could be fixed in a certain sterile line,the sca of CMS-restorer interaction and the sca of CMS-maintainer-restorer interaction.Effects of 1000-grain weight revealed significantly different among W-cms,D-cms and K-cms with identical effects of other traits.Accordingly,a sterile line with multiple-cytoplasm and multiple-cytoplasmic hybrid rice could be raised and exploited in hybrid rice production.