河北省玉米种质基础、杂优群划分和杂交优势利用模式研究

对河北省玉米主要生产用种的种质分析表明：改良Reid系统从1980—1998年所占比例基本上是上升趋势，1999年开始大幅度下降。兰卡斯特系统在1980－1998年为下降趋势，1999年开始上升。唐四平头系统所占比例呈波浪式变化，在20世纪90年代初达到峰值，之后开始下降。旅大红骨所占比例一直最低。河北省玉米种质分为5大杂种优势群、8个亚群，即改良Reid群、兰卡斯特群（包括M017和自330两个亚群）、唐四平头群、旅大红骨群和其它种质杂优群（包括外杂选亚群、综合种选亚群和Suwan亚群）。总结出12种主体杂优利用模式和18种子模式。

Studies on Maize Germplasm Base Division of Heterosis Groups and Utilizing Models of Heterosis in Hebei Province

The main maize germplasm in Hebei Province were analyzed. The result indicated that the proportion of improved Reid germplasm tended to increase from 1980 to 1998 and decrease after 1999. Lancaster germplasm tended to decrease from 1980 to 1988 and begin to increase after 1999. The proportion change of Tongsipingtou germplasm submitted to be wave upon wave and it got to peak value in 1990s then went down. The proportion of Ludahonggu was the lowest all along. Maize germplasm in Hebei Province were divided into 5 maize heterosis groups and 8 sub groups, such as improved Reid group, Lancaster group, Tongsipingtou group, Ludahonggu group and other group. Heterosis utilized models include 12 dominate ones and 18 subdominates.