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玉米是我省主要粮食作物之一。无产阶级文化大革命以来,各地积极推广杂交种,使玉米产量显著提高,对我省初步实现粮食自给,起了一定作用。但是,近年来有的地方在繁殖自交系和配制杂交种时,对隔离区选择不够严格,加之田间去杂去劣不彻底,从而降低了自交系的纯度。其次,在脱粒保存过程中,有的由于没有单收、单打,分别保存也造成了人为的种子混杂,这都使杂种优势有所减退,增产效果受到较大的影响。因此,认真做好玉米自交系的提纯工作,是当前种子工作的一项重要任务。
Corn is one of the main food crops in our province. Since the Great Proletarian Cultural Revolution, all localities have been actively promoting hybrids and have significantly increased their corn output, which has played a certain role in the initial realization of food self-sufficiency in our province. However, in some areas in recent years, breeding inbred lines and the preparation of hybrids, the isolation zone is not strict enough, coupled with the field to go to the wrong place is not complete, thereby reducing the purity of inbred lines. Secondly, in the process of threshing and preserving, some have no single income, singles, respectively, resulting in the preservation of man-made seeds mixed, which have diminished the heterosis, increased yield has been greatly affected. Therefore, conscientiously carrying out the purification of maize inbred lines is an important task for the current seed work.