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本文着重研究了玉米杂交种铁单４号和本育９号的幼苗特征，掌握了快速鉴定两杂交种的方法，为在生产中快速鉴定两品种纯度提供了可靠的依据。
In this paper, the seedling characteristics of maize hybrids Tiedan 4 and Benyu 9 were studied emphatically, and the methods for rapid identification of the two hybrids were mastered, which provided a reliable basis for the rapid identification of the purity of the two cultivars in the production.