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高产 杂交粳 稻泗优６８ ６ 、泗 优５２３ 的株 型特征 在于 具有 协调 的茎、叶、穗 系，后 期叶 片日积累力 高，存活 绿色叶片 数多，熟 相佳。提 出了高产 杂交 粳稻 的理 想株 型 模式 ，并 阐述 了江 苏 省高产杂交 粳稻育 种的关键 ，是在塑 造理想株 型的基 础上，协调 竞争优 势与超亲 优势的齐 驱并进 。
The plant type of high yielding hybrid rice Siyou 68 6 and Siyou 523 is characterized by coordinated stems, leaves and panicles, high accumulation power of leaves at the late stage, more number of green leaves surviving and good maturity. The ideal plant type model of japonica hybrid rice with high yield was put forward. The key to breeding high-yielding japonica hybrid rice in Jiangsu Province was elaborated on the basis of shaping the ideal plant type.