将６份早粳材料按不完全双列杂交配组，并在早季及其再生条件下进行试验．结果表明，早季稻和再生稻的生长势和繁殖力均存在明显的差异，再生稻表现为抽穗天数缩短、植株变矮、穗数下降、穗子变小；早季稻和再生稻性状的基因效应表达也有不同，在株高、剑叶长、主穗长和主穗总粒数等性状上，早季稻均以加性效应控制为主，而再生稻则受显性效应的影响更大；早季稻与再生稻间存在着相关性，除单株穗数和主穗总粒数外，其余６个性状上两者均有显著或极显著的正相关 Six japonica japonica cultivars were grouped according to incomplete diallel crossings and tested in early season and under regeneration conditions. The results showed that there was a significant difference in growth potential and fecundity between early rice and ratoon rice, while that of ratoon rice showed shorter days of heading, shorter plants, fewer ears and fewer ears; The effect expression was also different. In the characters of plant height, length of flag leaf, main spike length and total number of main spike, the early season rice was dominated by additive effect, while the regenerative rice was more affected by the dominant effect There was a correlation between early rice and ratoon rice, except for the number of panicle per panicle and total grain number of main panicle, the other 6 traits had significant or extremely significant positive correlation