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印尼早籼Ａ是我所用珍汕９７Ａ作母本，印尼早籼作父本，经连续成对择优回交转育而成的新不育系。其平均花时比珍汕９７Ａ提前１小时１１分钟，开颖角度大４．８度，柱头外露率高９．７％。 杂交水稻不育系开花习性的好坏，直接关系到所配组合在生产上的应用价值，是育种者们在不育系选育过程中必须考虑的性状之一。本文侧重于观察研究印尼早税Ａ的开花习性，将它与珍汕９７Ａ比较作一初报。
Indica indica A is the new male sterile line that we used Zhenshan 97A as the female parent and Indonesian early indica as the male parent, which was selected by successive pairwise selection and backcrossing. The average time spent than 1 hour and 97 minutes earlier than the 97A Zhenshan open angle of 4.8 degrees, 9.7% higher stigma exposure. The flowering habits of hybrid rice CMS is directly related to the application value of the combination in the production, which is one of the traits that breeders must consider in the breeding of CMS. This article focuses on observing the flowering habit of Indonesian morning tax A and comparing it with that of Zhenshan 97A for the first time.