The length of the first internode of rice has an important impact on the top soil ability and seedling emergence rate of rice. In order to explore whether the osopt9 gene has a certain impact on the length of the first internode of rice, and further explore the role of osopt9 gene in the growth and development of rice. In this study, the length of the first internode on the main panicle of transgenic rice line 129-7, mutant rice 95-20 and common control variety Nipponbare, which were planted under the same conditions and had the same long development period, were measured, After statistical analysis, the length of the first internode of transgenic rice and mutant rice was significantly lower than that of the control variety Nipponbare. From the above experimental results, it can be concluded that the length of the first internode of rice can be shortened by osopt9 gene.<br>
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