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顶端结实率系指稻穗每个一、二次枝梗顶端结实谷粒数与一、二次枝梗数目的比值的百分数。由于枝梗顶端的颖花是强势颖花,在一般情况下,成为空秕粒的可能性最小,所以,比较组合间的顶端结实率,即可看出其抗逆性的差异。此法快速简便,群众容易掌握。1978年秋季,我们对17个杂交
The top seed setting rate refers to the percentage of the ratio of the number of top grains and the number of primary and secondary branches of each primary and secondary branch of rice. Since the spikelets on the top of the stems are strongly spikelets, in the general case, the possibility of becoming spongiform nodules is the smallest. Therefore, comparing the top seed setting rate of the combinations, we can see the difference of their resistances. This method is quick and easy, easy to grasp by the masses. In the fall of 1978, we had 17 crosses