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用27个组合得出的试验结果表明:籼粳稻亚种间杂种一代具有很强的优势,主要表现在单株秆重、每穗总粒数、单株茎数、株高,穗长、抽穗日数、着粒密度、全生育期等性状均显著超过大值亲本(P<0.005)。但杂种一代的成穗率、每穗实粒数和结实率均显著低于双亲平均值(P<0.005),杂种一代的单株穗数、千粒重和单株粒重与大值亲本比较,差异不显著;通径分析表明,对杂种一代单株粒重有显著影响的7个性状中,以单株穗数的影响为最大,其余性状依次为结实率,每穗实粒数,株高,着粒密度,千粒重,全生育期;株高、穗长、着粒密度、单株茎数、单株穗数、每穗总粒数、每穗实粒数等性状的杂种一代值均与双亲平均值呈显著或极显著正相关;穗长、单株粒重、单株秆重、千粒重、抽穗日数等性状的杂种一代优势强弱均与双亲平均值呈显著或极显著的负相关。
The results obtained with 27 combinations showed that the cross between subspecies of indica and japonica had a strong advantage, mainly manifested in the stalk weight per plant, the total number of grains per panicle, the number of stems per plant, plant height, spike length, heading The number of days, grain density, the whole growth period and other traits significantly exceeded the large parent (P <0.005). However, the rate of panicle formation, grain number per panicle and seed setting rate of hybrids were significantly lower than those of parents (P <0.005). The difference of panicle number per panicle, grain weight per plant and grain weight per plant was significant The results of path analysis showed that among the seven traits that had a significant effect on the grain weight per plant, the number of panicle per plant was the largest. The other traits were the seed setting rate, seed number per panicle, plant height, Grain density, 1000-grain weight, and full-growth stage. The F1 generation values of plant height, spike length, grain density, number of stalks per plant, number of ears per plant, total grains per panicle, number of grains per panicle, The average and the mean of the hybrids had significant or extremely significant positive correlation. The dominant and weak heterosis of the spike length, grain weight per plant, stalk weight per plant, 1000-grain weight and heading date were all significantly or extremely significantly negatively correlated with the average of parents.