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1976年,我们观察了杂交水稻幼穗分化前后出现的“双零叶期”与幼穗发育的关系,可用来预测花期。从外部形态特征鉴别幼穗发育时间,是一种新的较简墨预测花期的方法。现将我们及许多制种点观察的结果综述如下:一、“双零叶期”在水稻生长发育过程中,植株茎秆上部两张叶片的叶枕有时重叠在一起,我们称之谓“双零叶”。据观察,幼穗分化前后出现的“双零叶”
In 1976, we observed the relationship between the “double zero-leaf stage” and panicle development before and after panicle differentiation of hybrid rice, which can be used to predict the flowering period. Identification of the panicle development time from the external morphological features is a new method for predicting the flowering time of simpler ink. Now we and many seed point observation results are summarized as follows: First, the “double zero-leaf stage” in the process of rice growth and development, plant stems above the leaves of the two leaves sometimes overlap, we call it “double Zero leaves. ” It is observed that spikelets appear before and after the “double zero leaves”