通过对02428形态特征、生理特性研究及与籼稻品种亲和力和杂种一代优势分析、F_1与亲本性状的相关性测定,结果表明:02428是一个中熟粳稻品种,与籼稻品种杂交表现出较强的亲和力,但其亲和性具有明显的选择性。提出了“窄谱型”概念。杂种一代优势明显,并有一定的关联性,产量优势度主要受单株穗数和单株干物重的影响。本文对籼粳亚种间杂种优势利用途径进行了探讨。 The results showed that 02428 was a middle-maturing japonica rice variety, which showed a strong affinity with indica rice varieties through the analysis of the morphological characteristics and physiological characteristics of 02428, the affinity with indica rice varieties, the heterosis analysis of F1 generation and the parental traits. , But its affinity has obvious selectivity. Proposed the concept of “narrow spectrum type”. The hybrid generation had obvious advantages and some correlations. The yield superiority was mainly affected by the number of panicle per plant and dry matter weight per plant. In this paper, the utilization of heterosis between indica and japonica subspecies was discussed.