Preliminary Study of Cytoplasm Effect on Several Quantitive Characters of Maize Hybrids

2 series of isonuclear-allocytoplasmic lines under 3 kinds of sterile cytoplasm and normal cytoplasm background as maternal parents,five tester lines as paternal parents were employed to compose a 8×5 incomplete diallel cross and the effects of cytoplasm were analyzed with split-split plot design.The results indicated that sterile cytoplasm had negative effect on ear diameter, grain weight per ear,plant height,positive effect on 100-grain weight and different direction effect on ear height.Cytoplasm effect,nuclear-cytoplasicm interaction including cytoplasmic-tester interaction,cytoplasmic-maintainer interaction,cytoplasmic-tester-maintainer interaction had significant influence on grain weight per ear,plant height and ear height.