近年来,我国各地已重视开展棉花杂种优势利用的研究.在陆地棉品种间杂种优势的利用方面,采用不育系、人工去雄、化学杀雄等方法产生杂交种,进行大面积试种,并取得了可喜的成绩.本省棉区也正在进行陆地棉杂交种的试种.我们从1975年到1978年4年中,曾结合陆地棉杂交育种工作,对陆地棉品种间杂种1代和2代进行了农艺性状、经济性状和产量等的测定,分析了杂种优势的表现,探讨了在生产上的利用问题.现将结果归纳如下,以供参考. In recent years, our country has paid great attention to the utilization of cotton heterosis.In the use of heterosis between upland cotton varieties, using sterile lines, artificial to male, chemical kill male and other methods to produce hybrids, large-scale test, And achieved gratifying results in the cotton area is also under way to test Upland cotton hybrids.We from 1975 to 1978 four years, had combined with G. hybrid cotton breeding, upland cotton hybrids 1 and 2 The agronomic traits, economic traits and yield were measured, the performance of heterosis was analyzed, and the utilization in production was discussed.The results are summarized as follows for reference.