玉米4类种质杂种优势利用模式

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.

Study on Heterosis Models of Four Germplasm Populations of Corn

AThe heterosis and combining ability of the heterosis models were studied with the representative inbred lines of Tangsipingtou population, Lancaster population, Reid population and Ludahonggu population by complete diallell crosses.The results showed that the specific combining ability and heterosis of main yield characters of crossbreed between populations were higher than that of crossbreed in population.The specific combining ability effects and heterosis of heterosis models were difference in characters as followings, and the heterosis of L×R, Tang×L, Tang×R were high on grain weight of plant, and specific combining ability effects of L×R, Tang×R, Tang×Lu were high on grain weight of plant.