以唐四平头系统、Lancaster系统、Reid系统和旅大红骨系统的代表性自交系为材料 ,完全双列杂交 ,分析各杂交模式的杂种优势和配合力。结果表明 :系统间杂交后代的产量等主要性状杂种优势和特殊配合力普遍高于系统内杂交后代 ;不同杂交模式的超亲优势和特殊配合力均因性状不同而有所差异 ,单株粒重的超亲优势以 L× R、唐× L、唐× R较高 ,单株粒重特殊配合力以 L× R、唐× R、唐×旅较高 The representative inbred lines of Tangsipingping, Lancaster, Reid and Ludahongbiao were used as materials to complete the double crosses and to analyze their heterosis and combining ability. The results showed that the heterosis and special combining ability of the main traits such as yield were generally higher than that of inbred lines. The heterosis and special combining ability of different hybridization patterns were different due to different traits. The grain weight per plant L × R, Tang × L, Tang × R were higher, and the special combining ability of grain weight was L × R, Tang × R, Tang × Brigade higher