Simulation test of hybrid rice production demonstrated that the purity of hybrid rice would be improved greatly by using leaf colour as a marker to eliminate the false hybrid rice at early stage.

模拟杂交稻生产和制种繁种，表明利用苗期叶色标记结合人工去杂，可有效提高田间纯度。

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Experimental results show that the false negative rate and the false positive rate of the hybrid system are both lower than the HMM based system.

实验结果表明该混合系统的漏报率和误报率都低于HMM方法。

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