对 优 7号和对照种汕优 6 3的主要经济性状、丰产性、稳产性和适应性等生产特性进行分析研究的结果表明 : 优 7号的结实率、丰产性、稳产性、适应性和抗稻瘟病性都优于对照汕优 6 3,是一个理想的中籼迟熟杂交稻新组合 The main economic traits, high yield, stable yield and adaptability of Yyou 7 and Shanyou 63 were analyzed. The results showed that the seed yield, yield, stability, adaptability, The resistance to blast was better than that of Shanyou 63, which is an ideal new combination of indica late maturing hybrid rice