The results showed that:(1)160 tested RIL gave a continuous distribution in their resistance indices to BPH, indicating that the resistance in the tested rice plants to BPH belonged to polygenic type.

结果如下： （1） 该群体对褐飞虱的平均抗性指数和平均受害等级均呈连续分布， 显示了数量性状的特征， 表明该群体及其亲本对褐飞虱的抗性是由微效多基因控制的数量抗性；

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