The Diversity of Cytoplasmic Effects on Some Quantitative Traits in Hybrid Rice

Analysis on the diverse effects of cytoplasmic male sterility (CMS) was carried out in a 9 ×8 uncomplete diallele cross including 3 series of isonuclear-allocytoplasmic lines under 3 Kinds of CMS background, i. e. 9 CMS lines, and 8 restorer lines, with split-split plot design. The effects of different CMSs on one trait are diverse from each other, so are 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 can be fixed in a certain sterile line, the SCA of CMS-restorer interaction and the SCA of CMS-maintainer-restorer interaction. Effects on 1000-grain weight were revealed significantly different among W-cms, D-cms and Kcms with identical effects on the other traits. Accordingly, a sterile line with multiple-cytoplasm and multiple cytoplasmic hybrid rice could be raised and exploited in hybrid rice production.